@@ -196,6 +196,8 @@
| | | `- README.txt
| | |- samd20-xplained/
| | | `- README.txt
+ | | |- samd21-xplained/
+ | | | `- README.txt
| | |- saml21-xplained/
| | | `- README.txt
| | |- sam3u-ek/
diff --git a/README.txt b/README.txt
index e09b853831..3be0f74c3a 100644
--- a/README.txt
+++ b/README.txt
@@ -1284,6 +1284,8 @@ nuttx
| | `- README.txt
| |- samd20-xplained/
| | `- README.txt
+ | |- samd21-xplained/
+ | | `- README.txt
| |- saml21-xplained/
| | `- README.txt
| |- sam3u-ek/
diff --git a/arch/arm/src/samdl/Kconfig b/arch/arm/src/samdl/Kconfig
index 380ba40c83..279e81e003 100644
--- a/arch/arm/src/samdl/Kconfig
+++ b/arch/arm/src/samdl/Kconfig
@@ -145,7 +145,7 @@ config ARCH_CHIP_SAMD21E15B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21E
---help---
- Flash 32KB SRAM 4KB
+ Flash 32KB SRAM 4KB RWW FLASH 1KB
config ARCH_CHIP_SAMD21E16A
bool "SAMD21E16A"
@@ -161,7 +161,7 @@ config ARCH_CHIP_SAMD21E16B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21E
---help---
- Flash 64KB SRAM 8KB
+ Flash 64KB SRAM 8KB RWW FLASH 2KB
config ARCH_CHIP_SAMD21E17A
bool "SAMD21E17A"
@@ -193,7 +193,7 @@ config ARCH_CHIP_SAMD21G15B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21G
---help---
- Flash 32KB SRAM 4KB
+ Flash 32KB SRAM 4KB RWW FLASH 1KB
config ARCH_CHIP_SAMD21G16A
bool "SAMD21G16A"
@@ -209,7 +209,7 @@ config ARCH_CHIP_SAMD21G16B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21E
---help---
- Flash 64KB SRAM 8KB
+ Flash 64KB SRAM 8KB RWW FLASH 2KB
config ARCH_CHIP_SAMD21G17A
bool "SAMD21G17A"
@@ -241,7 +241,7 @@ config ARCH_CHIP_SAMD21J15B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21J
---help---
- Flash 32KB SRAM 4KB
+ Flash 32KB SRAM 4KB RWW FLASH 1KB
config ARCH_CHIP_SAMD21J16A
bool "SAMD21J16A"
@@ -257,7 +257,7 @@ config ARCH_CHIP_SAMD21J16B
select ARCH_FAMILY_SAMD21
select ARCH_FAMILY_SAMD21J
---help---
- Flash 64KB SRAM 8KB
+ Flash 64KB SRAM 8KB RWW FLASH 2KB
config ARCH_CHIP_SAMD21J17A
bool "SAMD21J17A"
@@ -386,6 +386,7 @@ config ARCH_FAMILY_SAMD21
bool
default n
select SAMDL_HAVE_DMAC
+ select SAMDL_HAVE_USB
config ARCH_FAMILY_SAMD21E
bool
@@ -410,6 +411,7 @@ config ARCH_FAMILY_SAML21
bool
default n
select SAMDL_HAVE_DMAC
+ select SAMDL_HAVE_USB
config ARCH_FAMILY_SAML21E
bool
@@ -561,6 +563,11 @@ config SAMDL_TC7
default n
depends on SAMDL_HAVE_TC7
+config SAMDL_USB
+ bool "USB"
+ default n
+ depends on SAMDL_HAVE_USB
+
config SAMDL_WDT
bool "Watchdog Timer"
default n
diff --git a/configs/Kconfig b/configs/Kconfig
index b6bd245944..d449d4719f 100644
--- a/configs/Kconfig
+++ b/configs/Kconfig
@@ -695,6 +695,17 @@ config ARCH_BOARD_SAMD20_XPLAINED
This board features the ATSAMD20J18A MCU (Cortex-M0+ with 256KB of FLASH
and 32KB of SRAM).
+config ARCH_BOARD_SAMD21_XPLAINED
+ bool "Atmel SAMD21-Xplained Pro development board"
+ depends on ARCH_CHIP_SAMD21J18A
+ select ARCH_HAVE_LEDS
+ select ARCH_HAVE_BUTTONS
+ select ARCH_HAVE_IRQBUTTONS
+ ---help---
+ The port of NuttX to the Atmel SAMD21-Xplained Pro development board.
+ This board features the ATSAMD21J18A MCU (Cortex-M0+ with 256KB of FLASH
+ and 32KB of SRAM).
+
config ARCH_BOARD_SAML21_XPLAINED
bool "Atmel SAML21-Xplained Pro development board"
depends on ARCH_CHIP_SAML21J18
@@ -1239,6 +1250,7 @@ config ARCH_BOARD
default "sama5d3-xplained" if ARCH_BOARD_SAMA5D3_XPLAINED
default "sama5d4-ek" if ARCH_BOARD_SAMA5D4_EK
default "samd20-xplained" if ARCH_BOARD_SAMD20_XPLAINED
+ default "samd21-xplained" if ARCH_BOARD_SAMD21_XPLAINED
default "saml21-xplained" if ARCH_BOARD_SAML21_XPLAINED
default "sam3u-ek" if ARCH_BOARD_SAM3UEK
default "sam4e-ek" if ARCH_BOARD_SAM4EEK
@@ -1533,6 +1545,9 @@ endif
if ARCH_BOARD_SAMD20_XPLAINED
source "configs/samd20-xplained/Kconfig"
endif
+if ARCH_BOARD_SAMD21_XPLAINED
+source "configs/samd21-xplained/Kconfig"
+endif
if ARCH_BOARD_SAML21_XPLAINED
source "configs/saml21-xplained/Kconfig"
endif
diff --git a/configs/README.txt b/configs/README.txt
index 00c808f778..20998ea05d 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -531,6 +531,11 @@ configs/samd20-xplained
board features the ATSAMD20J18A MCU (Cortex-M0+ with 256KB of FLASH and
32KB of SRAM).
+configs/samd21-xplained
+ The port of NuttX to the Atmel SAMD21-Xplained Pro development board. This
+ board features the ATSAMD21J18A MCU (Cortex-M0+ with 256KB of FLASH and
+ 32KB of SRAM).
+
configs/sam3u-ek
The port of NuttX to the Atmel SAM3U-EK development board.
diff --git a/configs/samd21-xplained/Kconfig b/configs/samd21-xplained/Kconfig
new file mode 100644
index 0000000000..ccee7c9921
--- /dev/null
+++ b/configs/samd21-xplained/Kconfig
@@ -0,0 +1,82 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_BOARD_SAMD21_XPLAINED
+
+menu "SAMD21 Xplained Pro Modules"
+
+config SAMD21_XPLAINED_IOMODULE
+ bool "I/O1 Module"
+ default n
+ ---help---
+ The I/O 1 module is attached. This module provides an MMC/SD card
+ slot.
+
+if SAMD21_XPLAINED_IOMODULE
+
+choice
+ prompt "I/O1 Module Location"
+ default SAMD21_XPLAINED_IOMODULE_EXT1
+
+config SAMD21_XPLAINED_IOMODULE_EXT1
+ bool "EXT1"
+
+config SAMD21_XPLAINED_IOMODULE_EXT2
+ bool "EXT2"
+
+endchoice
+endif
+
+config SAMD21_XPLAINED_OLED1MODULE
+ bool "OLED1 Module"
+ default n
+ ---help---
+ The OLED 1 module is attached. This module provides an OLED plus 3
+ additional switches and 3 additional LEDs.
+
+if SAMD21_XPLAINED_OLED1MODULE
+
+choice
+ prompt "OLED1 Module Location"
+ default SAMD21_XPLAINED_OLED1MODULE_EXT1
+
+config SAMD21_XPLAINED_OLED1MODULE_EXT1
+ bool "EXT1"
+
+config SAMD21_XPLAINED_OLED1MODULE_EXT2
+ bool "EXT2"
+
+endchoice
+endif
+endmenu
+
+if USART4_SERIAL_CONSOLE
+choice
+ prompt "USART 4 Connection"
+ default SAMD21_XPLAINED_USART4_EXT3
+
+config SAMD21_XPLAINED_USART4_EXT1
+ bool "EXT1"
+ depends on !SAMD21_XPLAINED_OLED1MODULE_EXT1 && !SAMD21_XPLAINED_IOMODULE_EXT1
+ ---help---
+ Select this option if the serial console is on SERCOM4 connected via
+ EXT1. The RX will be on PB9 and TX signal will be on PB8.
+
+config SAMD21_XPLAINED_USART4_EXT2
+ bool "EXT2"
+ depends on !SAMD21_XPLAINED_OLED1MODULE_EXT2 && !SAMD21_XPLAINED_IOMODULE_EXT2
+ ---help---
+ Select this option if the serial console is on SERCOM4 connected via
+ EXT2. The RX will be on PB13 and TX signal will be on PB12.
+
+config SAMD21_XPLAINED_USART4_EXT3
+ bool "EXT3"
+ ---help---
+ Select this option if the serial console is on SERCOM4 connect via
+ EXT3. The RX will be on PB11 and TX signal will be on PB10.
+
+endchoice
+endif
+endif
diff --git a/configs/samd21-xplained/README.txt b/configs/samd21-xplained/README.txt
new file mode 100644
index 0000000000..0264e5e676
--- /dev/null
+++ b/configs/samd21-xplained/README.txt
@@ -0,0 +1,745 @@
+README
+======
+
+This README discusses issues unique to NuttX configurations for the
+Atmel SAMD21 Xplained Pro development board. This board features the
+ATSAMD21J18A MCU.
+
+The SAMD21 Xplained Pro Starter Kit may be bundled with three modules:
+
+1) I/O1 - An MMC/SD card slot, PWM LED control, ADC light sensor, USART
+ loopback, TWI AT30TSE758 Temperature sensor.
+2) OLED1 - An OLED plus 3 additional switches and 3 additional LEDs
+3) PROTO1 - A prototyping board with logic on board (other than power-related
+ logic).
+
+Contents
+========
+
+ - STATUS/ISSUES
+ - Modules
+ - LEDs
+ - Serial Consoles
+ - Atmel Studio 6.1
+ - SAMD21 Xplained Pro-specific Configuration Options
+ - Configurations
+
+STATUS/ISSUES
+=============
+
+ 1. See configs/samd20-xplained/README.txt. This port derives from the
+ SAMD20 Xplained board board and all issues there should apply.
+ 2. As of this writing, no testing has been performed. The board is on
+ order and testing will begin when I have the board in hand.
+
+Modules
+=======
+
+ There are several I/O modules available that will work with the SAMD21
+ Xplained Pro Starter Kit:
+
+ 1) I/O1 - An MMC/SD card slot, PWM LED control, ADC light sensor, USART
+ loopback, TWI AT30TSE758 Temperature sensor.
+ 2) OLED1 - An OLED plus 3 additional switches and 3 additional LEDs
+ 3) PROTO1 - A prototyping board with logic on board (other than power-
+ related logic).
+ 4) And others. See http://www.atmel.com/products/microcontrollers/avr/xplained.aspx
+
+ Some of these are discussed further below.
+
+ I/O1
+ ----
+ The primary function of this module is to provide SD card support, but
+ the full list of modules features include:
+
+ - microSD card connector (SPI interface)
+ - PWM (LED control)
+ - ADC (light sensor)
+ - USART loopback
+ - TWI AT30TSE758 Temperature sensor with EEPROM
+
+ SPI is available on two of the SAMD21 Xplained connectors, EXT1 and EXT2.
+ They mate with the I/O1 connector as indicated in this table.
+
+ I/O1 CONNECTOR
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ I/O1 EXT1 EXT2 Other use of either pin
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 1 ID 1 1 Communication line to ID chip on
+ extension board.
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 2 GND 2 GND 2 GND
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 3 LIGHTSENSOR 3 PB00 AIN[8] 3 PA10 AIN[18]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 4 LP_OUT 4 PB01 AIN[9] 4 PA11 AIN[19]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 5 GPIO1 5 PB06 GPIO 5 PA20 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 6 GPIO2 6 PB07 GPIO 6 PA21 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 7 LED 7 PB02 TC6/WO[0] 7 PB12 TC4/WO[0]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 8 LP_IN 8 PB03 TC6/WO[1] 8 PB13 TC4/WO[1]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 9 TEMP_ALERT 9 PB04 EXTINT[4] 9 PB14 EXTINT[14]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 10 microSD_DETECT 10 PB05 GPIO 10 PB15 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 11 TWI SDA 11 PA08 SERCOM2 PAD[0] 11 PA08 SERCOM2 PAD[0] EXT1, EXT2, EXT3 and EDBG
+ I²C SDA I²C SDA
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 12 TWI SCL 12 PA09 SERCOM2 PAD[1] 12 PA09 SERCOM2 PAD[1] EXT2, EXT3 and EDBG
+ I²C SCL I²C SCL
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 13 USART RX 13 PB09 SERCOM4 PAD[1] 13 PB11 SERCOM4 PAD[1] EXT3
+ USART RX USART RX
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 14 USART TX 14 PB08 SERCOM4 PAD[0] 14 PB10 SERCOM4 PAD[0] EXT3
+ USART TX USART TX
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 15 microSD_SS 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1]
+ SPI SS SPI SS
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 16 SPI_MOSI 16 PA06 SERCOM0 PAD[2] 16 PA18 SERCOM1 PAD[2]
+ SPI MOSI SPI MOSI
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 17 SPI_MISO 17 PA04 SERCOM0 PAD[0] 17 PA16 SERCOM1 PAD[0]
+ SPI MISO SPI MISO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 18 SPI_SCK 18 PA07 SERCOM0 PAD[3] 18 PA19 SERCOM1 PAD[3]
+ SPI SCK SPI SCK
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 19 GND 19 GND GND
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 20 VCC 20 VCC VCC
+ ----------------- ---------------------- ---------------------- ------------------------------------
+
+ The mapping between the I/O1 pins and the SD connector are shown in the
+ following table.
+
+ SD Card Connection
+ ------------------
+ I/O1 SD PIN Description
+ ---- ---- --- -------------------------------------------------
+ D2 1 Data line 2 (not used)
+ 15 D3 2 Data line 3. Active low chip select, pulled high
+ 16 CMD 3 Command line, connected to SPI_MOSI.
+ 20 VDD 4
+ 18 CLK 5 Clock line, connected to SPI_SCK.
+ 2/19 GND 6
+ 17 D0 7 Data line 0, connected to SPI_MISO.
+ D1 8 Data line 1 (not used)
+ 10 SW_A 9 Card detect
+ 2/19 SW_B 10 GND
+
+ Card Detect
+ -----------
+ When a microSD card is put into the connector SW_A and SW_B are short-
+ circuited. SW_A is connected to the microSD_DETECT signal. To use this
+ as a card indicator remember to enable internal pullup in the target
+ device.
+
+ GPIOs
+ -----
+ So all that is required to connect the SD is configure the SPI
+
+ --- ------------------ ---------------------- -------------------------------------
+ PIN EXT1 EXT2 Description
+ --- ------------------ ---------------------- -------------------------------------
+ 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1] Active low chip select OUTPUT, pulled
+ SPI SS SPI SS high on board.
+ --- ------------------ ---------------------- -------------------------------------
+ 10 PB05 GPIO 10 PB15 GPIO Active low card detect INPUT, must
+ use internal pull-up.
+ --- ------------------ ---------------------- -------------------------------------
+
+ Configuration Options:
+ ----------------------
+ CONFIG_SAMD21_XPLAINED_IOMODULE=y : Informs the system that the
+ I/O1 module is installed
+ CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1=y : The module is installed in EXT1
+ CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2=y : The mdoule is installed in EXT2
+
+ See the set-up in the discussion of the nsh configuration below for other
+ required configuration options.
+
+ NOTE: As of this writing, only the SD card slot is supported in the I/O1
+ module.
+
+ OLED1
+ -----
+ This module provides an OLED plus 3 additional switches and 3 additional
+ LEDs.
+
+ OLED1 CONNECTOR
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ OLED1 EXT1 EXT2 Other use of either pin
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 1 ID 1 1 Communication line to ID chip on
+ extension board.
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 2 GND 2 GND 2 GND
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 3 BUTTON2 3 PB00 AIN[8] 3 PA10 AIN[18]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 4 BUTTON3 4 PB01 AIN[9] 4 PA11 AIN[19]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 5 DATA_CMD_SEL 5 PB06 GPIO 5 PA20 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 6 LED3 6 PB07 GPIO 6 PA21 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 7 LED1 7 PB02 TC6/WO[0] 7 PB12 TC4/WO[0]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 8 LED2 8 PB03 TC6/WO[1] 8 PB13 TC4/WO[1]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 9 BUTTON1 9 PB04 EXTINT[4] 9 PB14 EXTINT[14]
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 10 DISPLAY_RESET 10 PB05 GPIO 10 PB15 GPIO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 11 N/C 11 PA08 SERCOM2 PAD[0] 11 PA08 SERCOM2 PAD[0] EXT1, EXT2, EXT3 and EDBG
+ I²C SDA I²C SDA
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 12 N/C 12 PA09 SERCOM2 PAD[1] 12 PA09 SERCOM2 PAD[1] EXT2, EXT3 and EDBG
+ I²C SCL I²C SCL
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 13 N/C 13 PB09 SERCOM4 PAD[1] 13 PB11 SERCOM4 PAD[1] EXT3
+ USART RX USART RX
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 14 N/C 14 PB08 SERCOM4 PAD[0] 14 PB10 SERCOM4 PAD[0] EXT3
+ USART TX USART TX
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 15 DISPLAY_SS 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1]
+ SPI SS SPI SS
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 16 SPI_MOSI 16 PA06 SERCOM0 PAD[2] 16 PA18 SERCOM1 PAD[2]
+ SPI MOSI SPI MOSI
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 17 N/C 17 PA04 SERCOM0 PAD[0] 17 PA16 SERCOM1 PAD[0]
+ SPI MISO SPI MISO
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 18 SPI_SCK 18 PA07 SERCOM0 PAD[3] 18 PA19 SERCOM1 PAD[3]
+ SPI SCK SPI SCK
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 19 GND 19 GND GND
+ ----------------- ---------------------- ---------------------- ------------------------------------
+ 20 VCC 20 VCC VCC
+ ----------------- ---------------------- ---------------------- ------------------------------------
+
+ Configuration Options:
+ ----------------------
+ CONFIG_SAMD21_XPLAINED_OLED1MODULE=y : Informs the system that the
+ I/O1 module is installed
+ CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1=y : The module is installed in EXT1
+ CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2=y : The mdoule is installed in EXT2
+
+ See the set-up in the discussion of the nsh configuration below for other
+ required configuration options.
+
+ PROTO1
+ ------
+ A prototyping board with logic on board (other than power-related logic).
+ There is no built-in support for the PROTO1 module.
+
+LEDs
+====
+
+ There is one yellow LED available on the SAM D20 Xplained Pro board that
+ can be turned on and off. The LED can be activated by driving the connected
+ PB30 I/O line to GND.
+
+ When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ control the LED as follows:
+
+ SYMBOL Meaning LED0
+ ------------------- ----------------------- ------
+ LED_STARTED NuttX has been started OFF
+ LED_HEAPALLOCATE Heap has been allocated OFF
+ LED_IRQSENABLED Interrupts enabled OFF
+ LED_STACKCREATED Idle stack created ON
+ LED_INIRQ In an interrupt N/C
+ LED_SIGNAL In a signal handler N/C
+ LED_ASSERTION An assertion failed N/C
+ LED_PANIC The system has crashed FLASH
+
+ Thus is LED is statically on, NuttX has successfully booted and is,
+ apparently, running normally. If LED is flashing at approximately
+ 2Hz, then a fatal error has been detected and the system has halted.
+
+Serial Consoles
+===============
+
+ SERCOM4
+ ------
+
+ SERCOM4 is available on connectors EXT1, EXT2, and EXT3, but using
+ different PORT pins:
+
+ PIN EXT1 EXT2 EXT3 GPIO Function
+ ---- ---- ---- ---- ------------------
+ 13 PB09 PB10 PB10 SERCOM4 / USART RX
+ 14 PB08 PB11 PB11 SERCOM4 / USART TX
+ 19 GND GND GND N/A
+ 20 VCC VCC VCC N/A
+
+ There are options available in the NuttX configuration to select which
+ connector SERCOM4 is on: SAMD21_XPLAINED_USART4_EXTn, where n=1, 2, or 3.
+
+ If you have a TTL to RS-232 converter then this is the most convenient
+ serial console to use (because you don't lose the console device each time
+ you lose the USB connection). It is the default in all of these
+ configurations. An option is to use the virtual COM port.
+
+ Virtual COM Port
+ ----------------
+
+ The SAMD21 Xplained Pro contains an Embedded Debugger (EDBG) that can be
+ used to program and debug the ATSAMD21J18A using Serial Wire Debug (SWD).
+ The Embedded debugger also include a Virtual COM port interface over
+ SERCOM3. Virtual COM port connections:
+
+ PA22 SERCOM3 / USART TXD
+ PA23 SERCOM3 / USART RXD
+
+Atmel Studio 6.1
+================
+
+ Loading Code into FLASH:
+ -----------------------
+
+ Tools menus: Tools -> Device Programming.
+
+ Debugging the NuttX Object File
+ -------------------------------
+
+ 1) Rename object file from nutt to nuttx.elf. That is an extension that
+ will be recognized by the file menu.
+
+ 2) File menu: File -> Open -> Open object file for debugging
+
+ - Select nuttx.elf object file
+ - Select AT91SAMD21J18
+ - Select files for symbols as desired
+ - Select debugger
+
+ 3) Debug menu: Debug -> Start debugging and break
+
+ - This will reload the nuttx.elf file into FLASH
+
+SAMD21 Xplained Pro-specific Configuration Options
+==================================================
+
+ CONFIG_ARCH - Identifies the arch/ subdirectory. This should
+ be set to:
+
+ CONFIG_ARCH=arm
+
+ CONFIG_ARCH_family - For use in C code:
+
+ CONFIG_ARCH_ARM=y
+
+ CONFIG_ARCH_architecture - For use in C code:
+
+ CONFIG_ARCH_CORTEXM0=y
+
+ CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
+
+ CONFIG_ARCH_CHIP="samdl"
+
+ CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
+ chip:
+
+ CONFIG_ARCH_CHIP_SAMD
+ CONFIG_ARCH_CHIP_SAMD21
+ CONFIG_ARCH_CHIP_ATSAMD21J18
+
+ CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
+ hence, the board that supports the particular chip or SoC.
+
+ CONFIG_ARCH_BOARD=samd21-xplained (for the SAMD21 Xplained Pro development board)
+
+ CONFIG_ARCH_BOARD_name - For use in C code
+
+ CONFIG_ARCH_BOARD_SAMD21_XPLAINED=y
+
+ CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
+ of delay loops
+
+ CONFIG_ENDIAN_BIG - define if big endian (default is little
+ endian)
+
+ CONFIG_RAM_SIZE - Describes the installed DRAM (SRAM in this case):
+
+ CONFIG_RAM_SIZE=0x00010000 (64KB)
+
+ CONFIG_RAM_START - The start address of installed DRAM
+
+ CONFIG_RAM_START=0x20000000
+
+ CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
+ have LEDs
+
+ CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
+ stack. If defined, this symbol is the size of the interrupt
+ stack in bytes. If not defined, the user task stacks will be
+ used during interrupt handling.
+
+ CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
+
+ CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
+
+ CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
+ cause a 100 second delay during boot-up. This 100 second delay
+ serves no purpose other than it allows you to calibratre
+ CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
+ the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
+ the delay actually is 100 seconds.
+
+ Individual subsystems can be enabled:
+
+ CONFIG_SAMDL_AC - Analog Comparator
+ CONFIG_SAMDL_ADC - Analog-to-Digital Converter
+ CONFIG_SAMDL_DAC - Digital-to-Analog Converter
+ CONFIG_SAMDL_DMAC - Analog Comparator
+ CONFIG_SAMDL_EVSYS - Event System
+ CONFIG_SAMDL_NVMCTRL - Non-Volatile Memory Controller
+ CONFIG_SAMDL_PTC - Peripheral Touch Controller
+ CONFIG_SAMDL_RTC - Real Time Counter
+ CONFIG_SAMDL_SERCOM0 - Serial Communication Interface 0
+ CONFIG_SAMDL_SERCOM1 - Serial Communication Interface 1
+ CONFIG_SAMDL_SERCOM2 - Serial Communication Interface 2
+ CONFIG_SAMDL_SERCOM3 - Serial Communication Interface 3
+ CONFIG_SAMDL_SERCOM4 - Serial Communication Interface 4
+ CONFIG_SAMDL_SERCOM5 - Serial Communication Interface 5
+ CONFIG_SAMDL_TCC0 - Timer/Counter 0 for Control
+ CONFIG_SAMDL_TCC1 - Timer/Counter 1 for Control
+ CONFIG_SAMDL_TCC2 - Timer/Counter 2 for Control
+ CONFIG_SAMDL_TC3 - Timer/Counter 3
+ CONFIG_SAMDL_TC4 - Timer/Counter 4
+ CONFIG_SAMDL_TC5 - Timer/Counter 5
+ CONFIG_SAMDL_TC6 - Timer/Counter 6
+ CONFIG_SAMDL_TC7 - Timer/Counter 6
+ CONFIG_SAMDL_USB - USB device or host
+ CONFIG_SAMDL_WDT - Watchdog Timer
+
+ Some subsystems can be configured to operate in different ways. The drivers
+ need to know how to configure the subsystem.
+
+ CONFIG_SAMDL_SERCOM0_ISI2C, CONFIG_SAMDL_SERCOM0_ISSPI, or CONFIG_SAMDL_SERCOM0_ISUSART
+ CONFIG_SAMDL_SERCOM1_ISI2C, CONFIG_SAMDL_SERCOM1_ISSPI, or CONFIG_SAMDL_SERCOM1_ISUSART
+ CONFIG_SAMDL_SERCOM2_ISI2C, CONFIG_SAMDL_SERCOM2_ISSPI, or CONFIG_SAMDL_SERCOM2_ISUSART
+ CONFIG_SAMDL_SERCOM3_ISI2C, CONFIG_SAMDL_SERCOM3_ISSPI, or CONFIG_SAMDL_SERCOM3_ISUSART
+ CONFIG_SAMDL_SERCOM4_ISI2C, CONFIG_SAMDL_SERCOM4_ISSPI, or CONFIG_SAMDL_SERCOM4_ISUSART
+ CONFIG_SAMDL_SERCOM5_ISI2C, CONFIG_SAMDL_SERCOM5_ISSPI, or CONFIG_SAMDL_SERCOM5_ISUSART
+
+ SAMD21 specific device driver settings
+
+ CONFIG_USARTn_SERIAL_CONSOLE - selects the USARTn (n=0,1,2,..5) for the
+ console and ttys0 (default is the USART4).
+ CONFIG_USARTn_RXBUFSIZE - Characters are buffered as received.
+ This specific the size of the receive buffer
+ CONFIG_USARTn_TXBUFSIZE - Characters are buffered before
+ being sent. This specific the size of the transmit buffer
+ CONFIG_USARTn_BAUD - The configure BAUD of the USART. Must be
+ CONFIG_USARTn_BITS - The number of bits. Must be either 7 or 8.
+ CONFIG_USARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
+ CONFIG_USARTn_2STOP - Two stop bits
+
+Configurations
+==============
+
+ Each SAMD21 Xplained Pro configuration is maintained in a sub-directory and
+ can be selected as follow:
+
+ cd tools
+ ./configure.sh samd21-xplained/
+ cd -
+ . ./setenv.sh
+
+ Before sourcing the setenv.sh file above, you should examine it and perform
+ edits as necessary so that BUILDROOT_BIN is the correct path to the directory
+ than holds your toolchain binaries.
+
+ And then build NuttX by simply typing the following. At the conclusion of
+ the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
+
+ make
+
+ The that is provided above as an argument to the tools/configure.sh
+ must be is one of the following.
+
+ NOTE: These configurations use the mconf-based configuration tool. To
+ change any of these configurations using that tool, you should:
+
+ a. Build and install the kconfig-mconf tool. See nuttx/README.txt
+ and misc/tools/
+
+ b. Execute 'make menuconfig' in nuttx/ in order to start the
+ reconfiguration process.
+
+ NOTES:
+
+ 1. These configurations use the mconf-based configuration tool. To
+ change any of these configurations using that tool, you should:
+
+ a. Build and install the kconfig-mconf tool. See nuttx/README.txt
+ and misc/tools/
+
+ b. Execute 'make menuconfig' in nuttx/ in order to start the
+ reconfiguration process.
+
+ 2. Unless stated otherwise, all configurations generate console
+ output of on SERCOM4 which is available on EXT1, EXT2, or EXT3 (see
+ the section "Serial Consoles" above). The virtual COM port could
+ be used, instead, by reconfiguring to use SERCOM3 instead of
+ SERCOM4:
+
+ System Type -> SAMD/L Peripheral Support
+ CONFIG_SAMDL_SERCOM3=y : Enable one or both
+ CONFIG_SAMDL_SERCOM4=n
+
+ Device Drivers -> Serial Driver Support -> Serial Console
+ CONFIG_USART4_SERIAL_CONSOLE=y : Select only one for the console
+ CONFIG_USART4_SERIAL_CONSOLE=n
+
+ Device Drivers -> Serial Driver Support -> SERCOM3 Configuration
+ CONFIG_USART3_2STOP=0
+ CONFIG_USART3_BAUD=115200
+ CONFIG_USART3_BITS=8
+ CONFIG_USART3_PARITY=0
+ CONFIG_USART3_RXBUFSIZE=256
+ CONFIG_USART3_TXBUFSIZE=256
+
+ Device Drivers -> Serial Driver Support -> SERCOM4 Configuration
+ CONFIG_USART4_2STOP=0
+ CONFIG_USART4_BAUD=115200
+ CONFIG_USART4_BITS=8
+ CONFIG_USART4_PARITY=0
+ CONFIG_USART4_RXBUFSIZE=256
+ CONFIG_USART4_TXBUFSIZE=256
+
+ Board Selection -> USART4 Connection
+ CONFIG_SAMD21_XPLAINED_USART4_EXT1=n : Pick on if USART4 used
+ CONFIG_SAMD21_XPLAINED_USART4_EXT2=n
+ CONFIG_SAMD21_XPLAINED_USART4_EXT3=y
+
+ 3. Unless otherwise stated, the configurations are setup for
+ Cygwin under Windows:
+
+ Build Setup:
+ CONFIG_HOST_WINDOWS=y : Windows Host
+ CONFIG_WINDOWS_CYGWIN=y : Cygwin environment on windoes
+
+ 4. These configurations use the CodeSourcery toolchain. But
+ that is easily reconfigured:
+
+ System Type -> Toolchain:
+ CONFIG_ARMV6M_TOOLCHAIN_CODESOURCERYW=y
+
+ Any re-configuration should be done before making NuttX or else the
+ subsequent 'make' will fail. If you have already attempted building
+ NuttX then you will have to 1) 'make distclean' to remove the old
+ configuration, 2) 'cd tools; ./configure.sh sam3u-ek/ksnh' to start
+ with a fresh configuration, and 3) perform the configuration changes
+ above.
+
+ Also, make sure that your PATH variable has the new path to your
+ Atmel tools. Try 'which arm-none-eabi-gcc' to make sure that you
+ are selecting the right tool. setenv.sh is available for you to
+ use to set or PATH variable. The path in the that file may not,
+ however, be correct for your installation.
+
+ See also the "NOTE about Windows native toolchains" in the section
+ called "GNU Toolchain Options" above.
+
+Configuration sub-directories
+-----------------------------
+
+ nsh:
+ This configuration directory will built the NuttShell. See NOTES above
+ and below:
+
+ NOTES:
+
+ 1. This configuration is set up to build on Windows using the Cygwin
+ environment using the CodeSourcery toolchain. This can be easily
+ changed as described above under "Configurations."
+
+ 2. By default, this configuration provides a serial console on SERCOM4
+ at 115200 8N1 via EXT3:
+
+ PIN EXT3 GPIO Function
+ ---- ---- ------------------
+ 13 PB11 SERCOM4 / USART RX
+ 14 PB10 SERCOM4 / USART TX
+ 19 GND N/A
+ 20 VCC N/A
+
+ If you would prefer to use the EDBG serial COM port or would prefer
+ to use SERCOM4 on EXT1 or EXT2, you will need to reconfigure the
+ SERCOM as described under "Configurations". See also the section
+ entitled "Serial Consoles" above.
+
+ 3. NOTE: If you get a compilation error like:
+
+ libxx_new.cxx:74:40: error: 'operator new' takes type 'size_t'
+ ('unsigned int') as first parameter [-fper
+
+ Sometimes NuttX and your toolchain will disagree on the underlying
+ type of size_t; sometimes it is an 'unsigned int' and sometimes it is
+ an 'unsigned long int'. If this error occurs, then you may need to
+ toggle the value of CONFIG_CXX_NEWLONG.
+
+ 4. If the I/O1 module is connected to the SAMD21 Xplained Pro, then
+ support for the SD card slot can be enabled by making the following
+ changes to the configuration. These changes assume that the I/O1
+ modules is connected in EXT1. Most of the modifications necessary
+ to work with the I/O1 in a different connector are obvious.. except
+ for the selection of SERCOM SPI support:
+
+ EXT1: SPI is provided through SERCOM0
+ EXT2: SPI is provided through SERCOM1
+ EXT3: SPI is provided through SERCOM5
+
+ File Systems:
+ CONFIG_FS_FAT=y : Enable the FAT file system
+ CONFIG_FAT_LCNAMES=y : Enable upper/lower case 8.3 file names (Optional, see below)
+ CONFIG_FAT_LFN=y : Enable long file named (Optional, see below)
+ CONFIG_FAT_MAXFNAME=32 : Maximum supported file name length
+
+ There are issues related to patents that Microsoft holds on FAT long
+ file name technologies. See the top level COPYING file for further
+ details.
+
+ System Type -> Peripherals:
+ CONFIG_SAMDL_SERCOM0=y : Use SERCOM0 if the I/O is in EXT1
+ CONFIG_SAMDL_SERCOM0_ISSPI=y : Configure SERCOM0 as an SPI master
+
+ Device Drivers
+ CONFIG_SPI=y : Enable SPI support
+ CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
+ CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
+
+ CONFIG_MMCSD=y : Enable MMC/SD support
+ CONFIG_MMCSD_NSLOTS=1 : Only one MMC/SD card slot
+ CONFIG_MMCSD_MULTIBLOCK_DISABLE=n : Should not need to disable multi-block transfers
+ CONFIG_MMCSD_MMCSUPPORT=n : May interfere with some SD cards
+ CONFIG_MMCSD_HAVECARDDETECT=y : I/O1 module as a card detect GPIO
+ CONFIG_MMCSD_SPI=y : Use the SPI interface to the MMC/SD card
+ CONFIG_MMCSD_SPICLOCK=20000000 : This is a guess for the optimal MMC/SD frequency
+ CONFIG_MMCSD_SPIMODE=0 : Mode 0 is required
+
+ Board Selection -> Common Board Options
+ CONFIG_NSH_MMCSDSLOTNO=0 : Only one MMC/SD slot, slot 0
+ CONFIG_NSH_MMCSDSPIPORTNO=0 : Use port=0 -> SERCOM0 if the I/O1 is in EXT1
+
+ Board Selection -> SAMD21 Xplained Pro Modules
+ CONFIG_SAMD21_XPLAINED_IOMODULE=y : I/O1 module is connected
+ CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1=y : I/O1 modules is in EXT1
+
+ Application Configuration -> NSH Library
+ CONFIG_NSH_ARCHINIT=y : Board has architecture-specific initialization
+
+ NOTE: If you enable the I/O1 this configuration with SERCOM4 as the
+ console and with the I/O1 module in EXT1, you *must* remove USART
+ jumper. Otherwise, you have lookpack on SERCOM4 and NSH will *not*
+ behave very well (since its outgoing prompts also appear as incoming
+ commands).
+
+ STATUS: As of 2013-6-18, this configuration appears completely
+ functional. Testing, however, has been very light. Example:
+
+ NuttShell (NSH) NuttX-6.34
+ nsh> mount -t vfat /dev/mmcsd0 /mnt/stuff
+ nsh> ls /mnt/stuff
+ /mnt/stuff:
+ nsh> echo "This is a test" >/mnt/stuff/atest.txt
+ nsh> ls /mnt/stuff
+ /mnt/stuff:
+ atest.txt
+ nsh> cat /mnt/stuff/atest.txt
+ This is a test
+ nsh>
+
+ 5. If the OLED1 module is connected to the SAMD21 Xplained Pro, then
+ support for the OLED display can be enabled by making the following
+ changes to the configuration. These changes assume that the I/O1
+ modules is connected in EXT1. Most of the modifications necessary
+ to work with the I/O1 in a different connector are obvious.. except
+ for the selection of SERCOM SPI support:
+
+ EXT1: SPI is provided through SERCOM0
+ EXT2: SPI is provided through SERCOM1
+ EXT3: SPI is provided through SERCOM5
+
+ System Type -> Peripherals:
+ CONFIG_SAMDL_SERCOM1=y : Use SERCOM1 if the I/O is in EXT2
+ CONFIG_SAMDL_SERCOM1_ISSPI=y : Configure SERCOM1 as an SPI master
+
+ Device Drivers -> SPI
+ CONFIG_SPI=y : Enable SPI support
+ CONFIG_SPI_EXCHANGE=y : The exchange() method is supported
+ CONFIG_SPI_CMDDATA=y : CMD/DATA support is required
+ CONFIG_SPI_OWNBUS=y : Smaller code if this is the only SPI device
+
+ Device Drivers -> LCDs
+ CONFIG_LCD=y : Enable LCD support
+ CONFIG_LCD_MAXCONTRAST=255 : Maximum contrast value
+ CONFIG_LCD_LANDSCAPE=y : Landscape orientation (see below*)
+ CONFIG_LCD_UG2832HSWEG04=y : Enable support for the OLED
+ CONFIG_LCD_SSD1306_SPIMODE=0 : SPI Mode 0
+ CONFIG_LCD_SSD1306_SPIMODE=3500000 : Pick an SPI frequency
+
+ Board Selection -> SAMD21 Xplained Pro Modules
+ CONFIG_SAMD21_XPLAINED_OLED1MODULE=y : OLED1 module is connected
+ CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2=y : OLED1 modules is in EXT2
+
+ The NX graphics subsystem also needs to be configured:
+
+ CONFIG_NX=y : Enable graphics support
+ CONFIG_NX_LCDDRIVER=y : Using an LCD driver
+ CONFIG_NX_NPLANES=1 : With a single color plane
+ CONFIG_NX_WRITEONLY=n : You can read from the LCD (see below**)
+ CONFIG_NX_DISABLE_2BPP=y : Disable all resolutions except 1BPP
+ CONFIG_NX_DISABLE_4BPP=y
+ CONFIG_NX_DISABLE_8BPP=y
+ CONFIG_NX_DISABLE_16BPP=y
+ CONFIG_NX_DISABLE_24BPP=y
+ CONFIG_NX_DISABLE_32BPP=y
+ CONFIG_NX_PACKEDMSFIRST=y : LSB packed first (shouldn't matter)
+ CONFIG_NXTK_BORDERWIDTH=2 : Use a small border
+ CONFIG_NXTK_DEFAULT_BORDERCOLORS=y : Default border colors
+ CONFIG_NXFONTS_CHARBITS=7 : 7-bit fonts
+ CONFIG_NXFONT_SANS17X23B=y : Pick a font (any that will fit)
+
+ * This orientation will put the buttons "above" the LCD. The
+ reverse landscape configuration (CONFIG_LCD_RLANDSCAPE) will
+ "flip" the display so that the buttons are "below" the LCD.
+
+ ** The hardware is write only, but the driver maintains a frame buffer
+ to support read and read-write-modiry operations on the LCD.
+ Reading from the frame buffer is, however, untested.
+
+ Then, in order to use the OLED, you will need to build some kind of
+ graphics application or use one of the NuttX graphics examples.
+ Here, for example, is the setup for the graphic "Hello, World!"
+ example:
+
+ CONFIG_EXAMPLES_NXHELLO=y : Enables the example
+ CONFIG_EXAMPLES_NXHELLO_DEFAULT_COLORS=y : Use default colors (see below *)
+ CONFIG_EXAMPLES_NXHELLO_DEFAULT_FONT=y : Use the default font
+ CONFIG_EXAMPLES_NXHELLO_BPP=1 : One bit per pixel
+ CONFIG_EXAMPLES_NXHELLO_EXTERNINIT=y : Special initialization is required.
+
+ * The OLED is monochrome so the only "colors" are blacka nd white.
+ The default "colors" will give you while text on a black background.
+ You can override the faults it you want black text on a while background.
+
+ NOTE: One issue that I have seen with the NXHello example when
+ running as an NSH command is that it only works the first time.
+ So, after you run the 'nxhello' command one time, you will have to
+ reset the board before you run it again.
+
+ This is clearly some issue with initializing, un-initializing, and
+ then re-initializing. If you want to fix this, patches are quite
+ welcome.
diff --git a/configs/samd21-xplained/include/board.h b/configs/samd21-xplained/include/board.h
new file mode 100644
index 0000000000..f60461a956
--- /dev/null
+++ b/configs/samd21-xplained/include/board.h
@@ -0,0 +1,587 @@
+/************************************************************************************
+ * configs/samd21-xplained/include/board.h
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMD21_XPLAINED_INCLUDE_BOARD_H
+#define __CONFIGS_SAMD21_XPLAINED_INCLUDE_BOARD_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include
+
+#ifndef __ASSEMBLY__
+# include
+# ifdef CONFIG_GPIO_IRQ
+# include
+# endif
+#endif
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/* Clocking *************************************************************************/
+/* Overview
+ *
+ * OSC8M Output = 8MHz
+ * `- GCLK1 Input = 8MHz Prescaler = 1 output = 8MHz
+ * `- DFLL Input = 8MHz Multiplier = 6 output = 48MHz
+ * `- GCLK0 Input = 48MHz Prescaler = 1 output = 48MHz
+ * `- PM Input = 48Mhz CPU divider = 1 CPU frequency = 48MHz
+ * APBA divider = 1 APBA frequency = 48MHz
+ * APBB divider = 1 APBB frequency = 48MHz
+ * APBC divider = 1 APBC frequency = 48MHz
+ *
+ * The SAMD21 Xplained Pro has one on-board crystal:
+ *
+ * XC101 32.768KHz XOSC32
+ *
+ * REVISIT: Not currently used, may want to use as GCLK1 source with
+ * DFLL multiplier of ((48000000+16384)/32768) = 1465 which would yield
+ * a clock of 48,005,120 MHz.
+ */
+
+/* XOSC Configuration -- Not available
+ *
+ * BOARD_XOSC_ENABLE - Boolean (defined / not defined)
+ * BOARD_XOSC_FREQUENCY - In Hz
+ * BOARD_XOSC_STARTUPTIME - See SYSCTRL_XOSC_STARTUP_* definitions
+ * BOARD_XOSC_ISCRYSTAL - Boolean (defined / not defined)
+ * BOARD_XOSC_AMPGC - Boolean (defined / not defined)
+ * BOARD_XOSC_ONDEMAND - Boolean (defined / not defined)
+ * BOARD_XOSC_RUNINSTANDBY - Boolean (defined / not defined)
+ */
+
+#undef BOARD_XOSC_ENABLE
+#define BOARD_XOSC_FREQUENCY 12000000UL
+#define BOARD_XOSC_STARTUPTIME SYSCTRL_XOSC_STARTUP_1S
+#define BOARD_XOSC_ISCRYSTAL 1
+#define BOARD_XOSC_AMPGC 1
+#define BOARD_XOSC_ONDEMAND 1
+#undef BOARD_XOSC_RUNINSTANDBY
+
+/* XOSC32 Configuration -- Not used
+ *
+ * BOARD_XOSC32K_ENABLE - Boolean (defined / not defined)
+ * BOARD_XOSC32K_FREQUENCY - In Hz
+ * BOARD_XOSC32K_STARTUPTIME - See SYSCTRL_XOSC32K_STARTUP_* definitions
+ * BOARD_XOSC32K_ISCRYSTAL - Boolean (defined / not defined)
+ * BOARD_XOSC32K_AAMPEN - Boolean (defined / not defined)
+ * BOARD_XOSC32K_EN1KHZ - Boolean (defined / not defined)
+ * BOARD_XOSC32K_EN32KHZ - Boolean (defined / not defined)
+ * BOARD_XOSC32K_ONDEMAND - Boolean (defined / not defined)
+ * BOARD_XOSC32K_RUNINSTANDBY - Boolean (defined / not defined)
+ */
+
+#undef BOARD_XOSC32K_ENABLE
+#define BOARD_XOSC32K_FREQUENCY 32768 /* 32.768KHz XTAL */
+#define BOARD_XOSC32K_STARTUPTIME SYSCTRL_XOSC32K_STARTUP_2S
+#define BOARD_XOSC32K_ISCRYSTAL 1
+#define BOARD_XOSC32K_AAMPEN 1
+#undef BOARD_XOSC32K_EN1KHZ
+#define BOARD_XOSC32K_EN32KHZ 1
+#define BOARD_XOSC32K_ONDEMAND 1
+#undef BOARD_XOSC32K_RUNINSTANDBY
+
+/* OSC32 Configuration -- not used
+ *
+ * BOARD_OSC32K_ENABLE - Boolean (defined / not defined)
+ * BOARD_OSC32K_FREQUENCY - In Hz
+ * BOARD_OSC32K_STARTUPTIME - See SYSCTRL_OSC32K_STARTUP_* definitions
+ * BOARD_OSC32K_EN1KHZ - Boolean (defined / not defined)
+ * BOARD_OSC32K_EN32KHZ - Boolean (defined / not defined)
+ * BOARD_OSC32K_ONDEMAND - Boolean (defined / not defined)
+ * BOARD_OSC32K_RUNINSTANDBY - Boolean (defined / not defined)
+ */
+
+#undef BOARD_OSC32K_ENABLE
+#define BOARD_OSC32K_FREQUENCY 32768 /* 32.768kHz internal oscillator */
+#define BOARD_OSC32K_STARTUPTIME SYSCTRL_OSC32K_STARTUP_4MS
+#define BOARD_OSC32K_EN1KHZ 1
+#define BOARD_OSC32K_EN32KHZ 1
+#define BOARD_OSC32K_ONDEMAND 1
+#undef BOARD_OSC32K_RUNINSTANDBY
+
+/* OSC8M Configuration -- always enabled
+ *
+ * BOARD_OSC8M_PRESCALER - See SYSCTRL_OSC8M_PRESC_DIV* definitions
+ * BOARD_OSC8M_ONDEMAND - Boolean (defined / not defined)
+ * BOARD_OSC8M_RUNINSTANDBY - Boolean (defined / not defined)
+ */
+
+#define BOARD_OSC8M_PRESCALER SYSCTRL_OSC8M_PRESC_DIV1
+#define BOARD_OSC8M_ONDEMAND 1
+#undef BOARD_OSC8M_RUNINSTANDBY
+
+#define BOARD_OSC8M_FREQUENCY 8000000 /* 8MHz high-accuracy internal oscillator */
+
+/* OSCULP32K Configuration -- not used. */
+
+#define BOARD_OSCULP32K_FREQUENCY 32000 /* 32kHz ultra-low-power internal oscillator */
+
+/* Digital Frequency Locked Loop configuration. In closed-loop mode, the
+ * DFLL output frequency (Fdfll) is given by:
+ *
+ * Fdfll = DFLLmul * Frefclk
+ * = 6 * 8000000 = 48MHz
+ *
+ * Where the reference clock is Generic Clock Channel 0 output of GLCK1.
+ * GCLCK1 provides OSC8M, undivided.
+ *
+ * When operating in open-loop mode, the output frequency of the DFLL will
+ * be determined by the values written to the DFLL Coarse Value bit group
+ * and the DFLL Fine Value bit group in the DFLL Value register.
+ *
+ * BOARD_DFLL_OPENLOOP - Boolean (defined / not defined)
+ * BOARD_DFLL_TRACKAFTERFINELOCK - Boolean (defined / not defined)
+ * BOARD_DFLL_KEEPLOCKONWAKEUP - Boolean (defined / not defined)
+ * BOARD_DFLL_ENABLECHILLCYCLE - Boolean (defined / not defined)
+ * BOARD_DFLL_QUICKLOCK - Boolean (defined / not defined)
+ * BOARD_DFLL_ONDEMAND - Boolean (defined / not defined)
+ * BOARD_DFLL_COARSEVALUE - Value
+ * BOARD_DFLL_FINEVALUE - Value
+ *
+ * Open Loop mode only:
+ * BOARD_DFLL_COARSEVALUE - Value
+ * BOARD_DFLL_FINEVALUE - Value
+ *
+ * Closed loop mode only:
+ * BOARD_DFLL_GCLKGEN - GCLK index
+ * BOARD_DFLL_MULTIPLIER - Value
+ * BOARD_DFLL_MAXCOARSESTEP - Value
+ * BOARD_DFLL_MAXFINESTEP - Value
+ *
+ * BOARD_DFLL_FREQUENCY - The resulting frequency
+ */
+
+#define BOARD_DFLL_ENABLE 1
+#undef BOARD_DFLL_OPENLOOP
+#undef BOARD_DFLL_ONDEMAND
+#undef BOARD_DFLL_RUNINSTANDBY
+
+/* DFLL open loop mode configuration */
+
+#define BOARD_DFLL_COARSEVALUE (0x1f / 4)
+#define BOARD_DFLL_FINEVALUE (0xff / 4)
+
+/* DFLL closed loop mode configuration */
+
+#define BOARD_DFLL_SRCGCLKGEN 1
+#define BOARD_DFLL_MULTIPLIER 6
+#define BOARD_DFLL_QUICKLOCK 1
+#define BOARD_DFLL_TRACKAFTERFINELOCK 1
+#define BOARD_DFLL_KEEPLOCKONWAKEUP 1
+#define BOARD_DFLL_ENABLECHILLCYCLE 1
+#define BOARD_DFLL_MAXCOARSESTEP (0x1f / 4)
+#define BOARD_DFLL_MAXFINESTEP (0xff / 4)
+
+#define BOARD_DFLL_FREQUENCY (48000000)
+
+/* GCLK Configuration
+ *
+ * Global enable/disable.
+ *
+ * BOARD_GCLK_ENABLE - Boolean (defined / not defined)
+ *
+ * For n=1-7:
+ * BOARD_GCLKn_ENABLE - Boolean (defined / not defined)
+ *
+ * For n=0-8:
+ * BOARD_GCLKn_RUN_IN_STANDBY - Boolean (defined / not defined)
+ * BOARD_GCLKn_CLOCK_SOURCE - See GCLK_GENCTRL_SRC_* definitions
+ * BOARD_GCLKn_PRESCALER - Value
+ * BOARD_GCLKn_OUTPUT_ENABLE - Boolean (defined / not defined)
+ */
+
+#define BOARD_GCLK_ENABLE 1
+
+/* GCLK generator 0 (Main Clock) - Source is the DFLL */
+
+#undef BOARD_GCLK0_RUN_IN_STANDBY
+#define BOARD_GCLK0_CLOCK_SOURCE GCLK_GENCTRL_SRC_DFLL48M
+#define BOARD_GCLK0_PRESCALER 1
+#undef BOARD_GCLK0_OUTPUT_ENABLE
+#define BOARD_GCLK0_FREQUENCY (BOARD_DFLL_FREQUENCY / BOARD_GCLK0_PRESCALER)
+
+/* Configure GCLK generator 1 - Drives the DFLL */
+
+#define BOARD_GCLK1_ENABLE 1
+#undef BOARD_GCLK1_RUN_IN_STANDBY
+#define BOARD_GCLK1_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK1_PRESCALER 1
+#undef BOARD_GCLK1_OUTPUT_ENABLE
+#define BOARD_GCLK1_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK1_PRESCALER)
+
+/* Configure GCLK generator 2 (RTC) */
+
+#undef BOARD_GCLK2_ENABLE
+#undef BOARD_GCLK2_RUN_IN_STANDBY
+#define BOARD_GCLK2_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC32K
+#define BOARD_GCLK2_PRESCALER 32
+#undef BOARD_GCLK2_OUTPUT_ENABLE
+#define BOARD_GCLK2_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK2_PRESCALER)
+
+/* Configure GCLK generator 3 */
+
+#undef BOARD_GCLK3_ENABLE
+#undef BOARD_GCLK3_RUN_IN_STANDBY
+#define BOARD_GCLK3_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK3_PRESCALER 1
+#undef BOARD_GCLK3_OUTPUT_ENABLE
+#define BOARD_GCLK3_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK3_PRESCALER)
+
+/* Configure GCLK generator 4 */
+
+#undef BOARD_GCLK4_ENABLE
+#undef BOARD_GCLK4_RUN_IN_STANDBY
+#define BOARD_GCLK4_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK4_PRESCALER 1
+#undef BOARD_GCLK4_OUTPUT_ENABLE
+#define BOARD_GCLK4_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK4_PRESCALER)
+
+/* Configure GCLK generator 5 */
+
+#undef BOARD_GCLK5_ENABLE
+#undef BOARD_GCLK5_RUN_IN_STANDBY
+#define BOARD_GCLK5_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK5_PRESCALER 1
+#undef BOARD_GCLK5_OUTPUT_ENABLE
+#define BOARD_GCLK5_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK5_PRESCALER)
+
+/* Configure GCLK generator 6 */
+
+#undef BOARD_GCLK6_ENABLE
+#undef BOARD_GCLK6_RUN_IN_STANDBY
+#define BOARD_GCLK6_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK6_PRESCALER 1
+#undef BOARD_GCLK6_OUTPUT_ENABLE
+#define BOARD_GCLK6_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK6_PRESCALER)
+
+/* Configure GCLK generator 7 */
+
+#undef BOARD_GCLK7_ENABLE
+#undef BOARD_GCLK7_RUN_IN_STANDBY
+#define BOARD_GCLK7_CLOCK_SOURCE GCLK_GENCTRL_SRC_OSC8M
+#define BOARD_GCLK7_PRESCALER 1
+#undef BOARD_GCLK7_OUTPUT_ENABLE
+#define BOARD_GCLK7_FREQUENCY (BOARD_OSC8M_FREQUENCY / BOARD_GCLK7_PRESCALER)
+
+/* The source of the main clock is always GCLK_MAIN. Also called GCLKGEN[0], this is
+ * the clock feeding the Power Manager. The Power Manager, in turn, generates main
+ * clock which is divided down to produce the CPU, AHB, and APB clocks.
+ *
+ * The main clock is initially OSC8M divided by 8.
+ */
+
+#define BOARD_GCLK_MAIN_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* Main clock dividers
+ *
+ * BOARD_CPU_DIVIDER - See PM_CPUSEL_CPUDIV_* definitions
+ * BOARD_CPU_FRQUENCY - In Hz
+ * BOARD_CPU_FAILDECT - Boolean (defined / not defined)
+ * BOARD_APBA_DIVIDER - See M_APBASEL_APBADIV_* definitions
+ * BOARD_APBA_FRQUENCY - In Hz
+ * BOARD_APBB_DIVIDER - See M_APBBSEL_APBBDIV_* definitions
+ * BOARD_APBB_FRQUENCY - In Hz
+ * BOARD_APBC_DIVIDER - See M_APBCSEL_APBCDIV_* definitions
+ * BOARD_APBC_FRQUENCY - In Hz
+ */
+
+#define BOARD_CPU_FAILDECT 1
+#define BOARD_CPU_DIVIDER PM_CPUSEL_CPUDIV_1
+#define BOARD_APBA_DIVIDER PM_APBASEL_APBADIV_1
+#define BOARD_APBB_DIVIDER PM_APBBSEL_APBBDIV_1
+#define BOARD_APBC_DIVIDER PM_APBCSEL_APBCDIV_1
+
+/* Resulting frequencies */
+
+#define BOARD_MCK_FREQUENCY (BOARD_GCLK_MAIN_FREQUENCY)
+#define BOARD_CPU_FREQUENCY (BOARD_MCK_FREQUENCY)
+#define BOARD_PBA_FREQUENCY (BOARD_MCK_FREQUENCY)
+#define BOARD_PBB_FREQUENCY (BOARD_MCK_FREQUENCY)
+#define BOARD_PBC_FREQUENCY (BOARD_MCK_FREQUENCY)
+#define BOARD_PBD_FREQUENCY (BOARD_MCK_FREQUENCY)
+
+/* FLASH wait states
+ *
+ * Vdd Range Wait states Maximum Operating Frequency
+ * ------------- -------------- ---------------------------
+ * 1.62V to 2.7V 0 14 MHz
+ * 1 28 MHz
+ * 2 42 MHz
+ * 3 48 MHz
+ * 2.7V to 3.63V 0 24 MHz
+ * 1 48 MHz
+ */
+
+#if 0 /* REVISIT -- should not be necessary */
+# define BOARD_FLASH_WAITSTATES 1
+#else
+# define BOARD_FLASH_WAITSTATES 2
+#endif
+
+/* SERCOM definitions ***************************************************************/
+/* This is the source clock generator for the GCLK_SERCOM_SLOW clock that is common
+ * to all SERCOM modules.
+ */
+
+#define BOARD_SERCOM05_SLOW_GCLKGEN 0
+
+/* SERCOM0 SPI is available on EXT1
+ *
+ * PIN PORT SERCOM FUNCTION
+ * --- ------------------ -----------
+ * 15 PA5 SERCOM0 PAD1 SPI SS
+ * 16 PA6 SERCOM0 PAD2 SPI MOSI
+ * 17 PA4 SERCOM0 PAD0 SPI MISO
+ * 18 PA7 SERCOM0 PAD3 SPI SCK
+ */
+
+#define BOARD_SERCOM0_GCLKGEN 0
+#define BOARD_SERCOM0_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
+#define BOARD_SERCOM0_MUXCONFIG (SPI_CTRLA_DOPO_DOPAD231 | SPI_CTRLA_DIPAD0)
+#define BOARD_SERCOM0_PINMAP_PAD0 PORT_SERCOM0_PAD0_2 /* SPI_MISO */
+#define BOARD_SERCOM0_PINMAP_PAD1 0 /* microSD_SS */
+#define BOARD_SERCOM0_PINMAP_PAD2 PORT_SERCOM0_PAD2_2 /* SPI_MOSI */
+#define BOARD_SERCOM0_PINMAP_PAD3 PORT_SERCOM0_PAD3_2 /* SPI_SCK */
+
+#define BOARD_SERCOM0_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* SERCOM1 SPI is available on EXT2
+ *
+ * PIN PORT SERCOM FUNCTION
+ * --- ------------------ -----------
+ * 15 PA17 SERCOM1 PAD1 SPI SS
+ * 16 PA18 SERCOM1 PAD2 SPI MOSI
+ * 17 PA16 SERCOM1 PAD0 SPI MISO
+ * 18 PA19 SERCOM1 PAD3 SPI SCK
+ */
+
+#define BOARD_SERCOM1_GCLKGEN 0
+#define BOARD_SERCOM1_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
+#define BOARD_SERCOM1_MUXCONFIG (SPI_CTRLA_DOPO_DOPAD231 | SPI_CTRLA_DIPAD0)
+#define BOARD_SERCOM1_PINMAP_PAD0 PORT_SERCOM1_PAD0_1 /* SPI_MISO */
+#define BOARD_SERCOM1_PINMAP_PAD1 0 /* microSD_SS */
+#define BOARD_SERCOM1_PINMAP_PAD2 PORT_SERCOM1_PAD2_1 /* SPI_MOSI */
+#define BOARD_SERCOM1_PINMAP_PAD3 PORT_SERCOM1_PAD3_1 /* SPI_SCK */
+
+#define BOARD_SERCOM1_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* The SAMD21 Xplained Pro contains an Embedded Debugger (EDBG) that can be
+ * used to program and debug the ATSAMD21J18A using Serial Wire Debug (SWD).
+ * The Embedded debugger also include a Virtual COM port interface over
+ * SERCOM3. Virtual COM port connections:
+ *
+ * PA22 SERCOM3 PAD[0] / USART TXD
+ * PA23 SERCOM3 PAD[1] / USART RXD
+ */
+
+#define BOARD_SERCOM3_GCLKGEN 0
+#define BOARD_SERCOM3_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
+#define BOARD_SERCOM3_MUXCONFIG (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0)
+#define BOARD_SERCOM3_PINMAP_PAD0 PORT_SERCOM3_PAD0_1 /* USART TX */
+#define BOARD_SERCOM3_PINMAP_PAD1 PORT_SERCOM3_PAD1_1 /* USART RX */
+#define BOARD_SERCOM3_PINMAP_PAD2 0
+#define BOARD_SERCOM3_PINMAP_PAD3 0
+
+#define BOARD_SERCOM3_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* The SERCOM4 USART is available on connectors EXT1, EXT2, and EXT3
+ *
+ * PIN EXT1 EXT2 EXT3 GPIO Function
+ * ---- ---- ---- ---- ------------------
+ * 13 PB09 PB10 PB10 SERCOM4 / USART RX
+ * 14 PB08 PB11 PB11 SERCOM4 / USART TX
+ * 19 GND GND GND N/A
+ * 20 VCC VCC VCC N/A
+ *
+ * If you have a TTL to RS-232 converter then this is the most convenient
+ * serial console to use (because you don't lose the console device each time
+ * you lose the USB connection). It is the default in all of the SAMD21
+ * configurations.
+ */
+
+#define BOARD_SERCOM4_GCLKGEN 0
+#define BOARD_SERCOM4_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
+
+#if defined(CONFIG_SAMD21_XPLAINED_USART4_EXT1)
+# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0)
+# define BOARD_SERCOM4_PINMAP_PAD0 PORT_SERCOM4_PAD0_3 /* USART TX */
+# define BOARD_SERCOM4_PINMAP_PAD1 PORT_SERCOM4_PAD1_3 /* USART RX */
+# define BOARD_SERCOM4_PINMAP_PAD2 0
+# define BOARD_SERCOM4_PINMAP_PAD3 0
+#elif defined(CONFIG_SAMD21_XPLAINED_USART4_EXT2)
+# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD3 | USART_CTRLA_TXPAD2)
+# define BOARD_SERCOM4_PINMAP_PAD0 0
+# define BOARD_SERCOM4_PINMAP_PAD1 0
+# define BOARD_SERCOM4_PINMAP_PAD2 PORT_SERCOM4_PAD2_3 /* USART TX */
+# define BOARD_SERCOM4_PINMAP_PAD3 PORT_SERCOM4_PAD3_3 /* USART RX */
+#else /* if defined(CONFIG_SAMD21_XPLAINED_USART4_EXT3) */
+# define BOARD_SERCOM4_MUXCONFIG (USART_CTRLA_RXPAD3 | USART_CTRLA_TXPAD2)
+# define BOARD_SERCOM4_PINMAP_PAD0 0
+# define BOARD_SERCOM4_PINMAP_PAD1 0
+# define BOARD_SERCOM4_PINMAP_PAD2 PORT_SERCOM4_PAD2_3 /* USART TX */
+# define BOARD_SERCOM4_PINMAP_PAD3 PORT_SERCOM4_PAD3_3 /* USART RX */
+#endif
+
+#define BOARD_SERCOM4_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* SERCOM5 SPI is available on EXT3
+ *
+ * PIN PORT SERCOM FUNCTION
+ * --- ------------------ -----------
+ * 15 PB17 SERCOM5 PAD1 SPI SS
+ * 16 PB22 SERCOM5 PAD2 SPI MOSI
+ * 17 PB16 SERCOM5 PAD0 SPI MISO
+ * 18 PB23 SERCOM5 PAD3 SPI SCK
+ */
+
+#define BOARD_SERCOM5_GCLKGEN 0
+#define BOARD_SERCOM5_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
+#define BOARD_SERCOM5_MUXCONFIG (SPI_CTRLA_DOPO_DOPAD231 | SPI_CTRLA_DIPAD0)
+#define BOARD_SERCOM5_PINMAP_PAD0 PORT_SERCOM5_PAD0_1 /* SPI_MISO */
+#define BOARD_SERCOM5_PINMAP_PAD1 0 /* microSD_SS */
+#define BOARD_SERCOM5_PINMAP_PAD2 PORT_SERCOM5_PAD2_4 /* SPI_MOSI */
+#define BOARD_SERCOM5_PINMAP_PAD3 PORT_SERCOM5_PAD3_4 /* SPI_SCK */
+
+#define BOARD_SERCOM5_FREQUENCY BOARD_GCLK0_FREQUENCY
+
+/* LED definitions ******************************************************************/
+/* There are three LEDs on board the SAMD21 Xplained Pro board: The EDBG
+ * controls two of the LEDs, a power LED and a status LED. There is only
+ * one user controllable LED, a yellow LED labelled STATUS near the SAMD21 USB
+ * connector.
+ *
+ * This LED is controlled by PC07 and the LED can be activated by driving the
+ * PB30 to GND.
+ */
+
+/* LED index values for use with sam_setled() */
+
+#define BOARD_STATUS_LED 0
+#define BOARD_NLEDS 1
+
+/* LED bits for use with sam_setleds() */
+
+#define BOARD_STATUS LED_BIT (1 << BOARD_STATUS_LED)
+
+/* When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ * control the LED as defined below. Thus if the LED is statically on, NuttX has
+ * successfully booted and is, apparently, running normally. If the LED is
+ * flashing at approximately 2Hz, then a fatal error has been detected and the
+ * system has halted.
+ */
+
+#define LED_STARTED 0 /* STATUS LED=OFF */
+#define LED_HEAPALLOCATE 0 /* STATUS LED=OFF */
+#define LED_IRQSENABLED 0 /* STATUS LED=OFF */
+#define LED_STACKCREATED 1 /* STATUS LED=ON */
+#define LED_INIRQ 2 /* STATUS LED=no change */
+#define LED_SIGNAL 2 /* STATUS LED=no change */
+#define LED_ASSERTION 2 /* STATUS LED=no change */
+#define LED_PANIC 3 /* STATUS LED=flashing */
+
+/* Button definitions ***************************************************************/
+/* Mechanical buttons:
+ *
+ * The SAMD21 Xplained Pro contains two mechanical buttons. One button is the
+ * RESET button connected to the SAMD21 reset line and the other is a generic user
+ * configurable button. When a button is pressed it will drive the I/O line to GND.
+ *
+ * PA15 SW0
+ */
+
+/* The SAMD21 Xplained Pro supports one button: */
+
+#define BUTTON_SW0 0
+#define NUM_BUTTONS 1
+
+#define BUTTON_SW0_BIT (1 << BUTTON_SW0)
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+/************************************************************************************
+ * Name: sam_boardinitialize
+ *
+ * Description:
+ * All SAM3U architectures must provide the following entry point. This entry point
+ * is called early in the initialization -- after all memory has been configured
+ * and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void sam_boardinitialize(void);
+
+/************************************************************************************
+ * Name: sam_ledinit, sam_setled, and sam_setleds
+ *
+ * Description:
+ * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board LEDs. If
+ * CONFIG_ARCH_LEDS is not defined, then the following interfaces are available to
+ * control the LEDs from user applications.
+ *
+ ************************************************************************************/
+
+#ifndef CONFIG_ARCH_LEDS
+void sam_ledinit(void);
+void sam_setled(int led, bool ledon);
+void sam_setleds(uint8_t ledset);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_SAMD21_XPLAINED_INCLUDE_BOARD_H */
diff --git a/configs/samd21-xplained/nsh/Make.defs b/configs/samd21-xplained/nsh/Make.defs
new file mode 100644
index 0000000000..06770a5d86
--- /dev/null
+++ b/configs/samd21-xplained/nsh/Make.defs
@@ -0,0 +1,122 @@
+############################################################################
+# configs/samd21-xplained/nsh/Make.defs
+#
+# Copyright (C) 2014 Gregory Nutt. All rights reserved.
+# Author: Gregory Nutt
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+# used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+include ${TOPDIR}/tools/Config.mk
+include ${TOPDIR}/arch/arm/src/armv6-m/Toolchain.defs
+
+LDSCRIPT = flash.ld
+
+ifeq ($(WINTOOL),y)
+ # Windows-native toolchains
+ ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
+ ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
+ ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
+else
+ # Linux/Cygwin-native toolchain
+ ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
+ ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
+ ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
+endif
+
+CC = $(CROSSDEV)gcc
+CXX = $(CROSSDEV)g++
+CPP = $(CROSSDEV)gcc -E
+LD = $(CROSSDEV)ld
+AR = $(ARCROSSDEV)ar rcs
+NM = $(ARCROSSDEV)nm
+OBJCOPY = $(CROSSDEV)objcopy
+OBJDUMP = $(CROSSDEV)objdump
+
+ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
+ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+ ARCHOPTIMIZATION = -g
+endif
+
+ifneq ($(CONFIG_DEBUG_NOOPT),y)
+ ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
+endif
+
+ARCHCFLAGS = -fno-builtin
+ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fno-rtti
+ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow
+ARCHWARNINGSXX = -Wall -Wshadow
+ARCHDEFINES =
+ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10
+
+CFLAGS = $(ARCHCFLAGS) $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
+AFLAGS = $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
+
+OBJEXT = .o
+LIBEXT = .a
+EXEEXT =
+
+ifneq ($(CROSSDEV),arm-nuttx-elf-)
+ LDFLAGS += -nostartfiles -nodefaultlibs
+endif
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+ LDFLAGS += -g
+endif
+
+
+HOSTCC = gcc
+HOSTINCLUDES = -I.
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
+HOSTLDFLAGS =
+ifeq ($(CONFIG_HOST_WINDOWS),y)
+ HOSTEXEEXT = .exe
+else
+ HOSTEXEEXT =
+endif
+
+ifeq ($(WINTOOL),y)
+ # Windows-native host tools
+ DIRLINK = $(TOPDIR)/tools/copydir.sh
+ DIRUNLINK = $(TOPDIR)/tools/unlink.sh
+ MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+else
+ # Linux/Cygwin-native host tools
+ MKDEP = $(TOPDIR)/tools/mkdeps$(HOSTEXEEXT)
+endif
diff --git a/configs/samd21-xplained/nsh/defconfig b/configs/samd21-xplained/nsh/defconfig
new file mode 100644
index 0000000000..52a291ff2c
--- /dev/null
+++ b/configs/samd21-xplained/nsh/defconfig
@@ -0,0 +1,846 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Nuttx/ Configuration
+#
+
+#
+# Build Setup
+#
+# CONFIG_EXPERIMENTAL is not set
+CONFIG_DEFAULT_SMALL=y
+# CONFIG_HOST_LINUX is not set
+# CONFIG_HOST_OSX is not set
+CONFIG_HOST_WINDOWS=y
+# CONFIG_HOST_OTHER is not set
+# CONFIG_WINDOWS_NATIVE is not set
+CONFIG_WINDOWS_CYGWIN=y
+# CONFIG_WINDOWS_MSYS is not set
+# CONFIG_WINDOWS_OTHER is not set
+
+#
+# Build Configuration
+#
+# CONFIG_APPS_DIR="../apps"
+CONFIG_BUILD_FLAT=y
+# CONFIG_BUILD_2PASS is not set
+
+#
+# Binary Output Formats
+#
+# CONFIG_RRLOAD_BINARY is not set
+# CONFIG_INTELHEX_BINARY is not set
+# CONFIG_MOTOROLA_SREC is not set
+CONFIG_RAW_BINARY=y
+# CONFIG_UBOOT_UIMAGE is not set
+
+#
+# Customize Header Files
+#
+# CONFIG_ARCH_STDINT_H is not set
+# CONFIG_ARCH_STDBOOL_H is not set
+# CONFIG_ARCH_MATH_H is not set
+# CONFIG_ARCH_FLOAT_H is not set
+# CONFIG_ARCH_STDARG_H is not set
+
+#
+# Debug Options
+#
+# CONFIG_DEBUG is not set
+# CONFIG_ARCH_HAVE_HEAPCHECK is not set
+CONFIG_ARCH_HAVE_STACKCHECK=y
+# CONFIG_STACK_COLORATION is not set
+# CONFIG_DEBUG_SYMBOLS is not set
+CONFIG_ARCH_HAVE_CUSTOMOPT=y
+# CONFIG_DEBUG_NOOPT is not set
+# CONFIG_DEBUG_CUSTOMOPT is not set
+CONFIG_DEBUG_FULLOPT=y
+
+#
+# System Type
+#
+CONFIG_ARCH_ARM=y
+# CONFIG_ARCH_AVR is not set
+# CONFIG_ARCH_HC is not set
+# CONFIG_ARCH_MIPS is not set
+# CONFIG_ARCH_RGMP is not set
+# CONFIG_ARCH_SH is not set
+# CONFIG_ARCH_SIM is not set
+# CONFIG_ARCH_X86 is not set
+# CONFIG_ARCH_Z16 is not set
+# CONFIG_ARCH_Z80 is not set
+CONFIG_ARCH="arm"
+
+#
+# ARM Options
+#
+# CONFIG_ARCH_CHIP_A1X is not set
+# CONFIG_ARCH_CHIP_C5471 is not set
+# CONFIG_ARCH_CHIP_CALYPSO is not set
+# CONFIG_ARCH_CHIP_DM320 is not set
+# CONFIG_ARCH_CHIP_EFM32 is not set
+# CONFIG_ARCH_CHIP_IMX is not set
+# CONFIG_ARCH_CHIP_KINETIS is not set
+# CONFIG_ARCH_CHIP_KL is not set
+# CONFIG_ARCH_CHIP_LM is not set
+# CONFIG_ARCH_CHIP_TIVA is not set
+# CONFIG_ARCH_CHIP_LPC11XX is not set
+# CONFIG_ARCH_CHIP_LPC17XX is not set
+# CONFIG_ARCH_CHIP_LPC214X is not set
+# CONFIG_ARCH_CHIP_LPC2378 is not set
+# CONFIG_ARCH_CHIP_LPC31XX is not set
+# CONFIG_ARCH_CHIP_LPC43XX is not set
+# CONFIG_ARCH_CHIP_NUC1XX is not set
+# CONFIG_ARCH_CHIP_SAMA5 is not set
+CONFIG_ARCH_CHIP_SAMD=y
+# CONFIG_ARCH_CHIP_SAML is not set
+# CONFIG_ARCH_CHIP_SAM34 is not set
+# CONFIG_ARCH_CHIP_SAMV7 is not set
+# CONFIG_ARCH_CHIP_STM32 is not set
+# CONFIG_ARCH_CHIP_STR71X is not set
+# CONFIG_ARCH_ARM7TDMI is not set
+# CONFIG_ARCH_ARM926EJS is not set
+# CONFIG_ARCH_ARM920T is not set
+CONFIG_ARCH_CORTEXM0=y
+# CONFIG_ARCH_CORTEXM3 is not set
+# CONFIG_ARCH_CORTEXM4 is not set
+# CONFIG_ARCH_CORTEXM7 is not set
+# CONFIG_ARCH_CORTEXA5 is not set
+# CONFIG_ARCH_CORTEXA8 is not set
+CONFIG_ARCH_FAMILY="armv6-m"
+CONFIG_ARCH_CHIP="samdl"
+CONFIG_ARCH_HAVE_CMNVECTOR=y
+# CONFIG_ARMV7M_CMNVECTOR is not set
+# CONFIG_ARMV7M_LAZYFPU is not set
+# CONFIG_ARCH_HAVE_FPU is not set
+# CONFIG_ARCH_HAVE_DPFPU is not set
+
+#
+# ARMV6M Configuration Options
+#
+# CONFIG_ARMV6M_TOOLCHAIN_ATOLLIC is not set
+# CONFIG_ARMV6M_TOOLCHAIN_BUILDROOT is not set
+# CONFIG_ARMV6M_TOOLCHAIN_CODEREDW is not set
+CONFIG_ARMV6M_TOOLCHAIN_CODESOURCERYW=y
+# CONFIG_ARMV6M_TOOLCHAIN_DEVKITARM is not set
+# CONFIG_ARMV6M_TOOLCHAIN_GNU_EABIL is not set
+# CONFIG_ARMV6M_TOOLCHAIN_GNU_EABIW is not set
+
+#
+# Atmel SAMD/L Configuration Options
+#
+# CONFIG_ARCH_CHIP_SAMD21E14 is not set
+# CONFIG_ARCH_CHIP_SAMD21E15 is not set
+# CONFIG_ARCH_CHIP_SAMD21E16 is not set
+# CONFIG_ARCH_CHIP_SAMD21E17 is not set
+# CONFIG_ARCH_CHIP_SAMD21E18 is not set
+# CONFIG_ARCH_CHIP_SAMD21G14 is not set
+# CONFIG_ARCH_CHIP_SAMD21G15 is not set
+# CONFIG_ARCH_CHIP_SAMD21G16 is not set
+# CONFIG_ARCH_CHIP_SAMD21G17 is not set
+# CONFIG_ARCH_CHIP_SAMD21G18 is not set
+# CONFIG_ARCH_CHIP_SAMD21J14 is not set
+# CONFIG_ARCH_CHIP_SAMD21J15 is not set
+# CONFIG_ARCH_CHIP_SAMD21J16 is not set
+# CONFIG_ARCH_CHIP_SAMD21J17 is not set
+CONFIG_ARCH_CHIP_SAMD21J18=y
+# CONFIG_ARCH_CHIP_SAMD21E15A is not set
+# CONFIG_ARCH_CHIP_SAMD21E15B is not set
+# CONFIG_ARCH_CHIP_SAMD21E16A is not set
+# CONFIG_ARCH_CHIP_SAMD21E16B is not set
+# CONFIG_ARCH_CHIP_SAMD21E17A is not set
+# CONFIG_ARCH_CHIP_SAMD21E18A is not set
+# CONFIG_ARCH_CHIP_SAMD21G15A is not set
+# CONFIG_ARCH_CHIP_SAMD21G15B is not set
+# CONFIG_ARCH_CHIP_SAMD21G16A is not set
+# CONFIG_ARCH_CHIP_SAMD21G16B is not set
+# CONFIG_ARCH_CHIP_SAMD21G17A is not set
+# CONFIG_ARCH_CHIP_SAMD21G18A is not set
+# CONFIG_ARCH_CHIP_SAMD21J15A is not set
+# CONFIG_ARCH_CHIP_SAMD21J15B is not set
+# CONFIG_ARCH_CHIP_SAMD21J16A is not set
+# CONFIG_ARCH_CHIP_SAMD21J16B is not set
+# CONFIG_ARCH_CHIP_SAMD21J17A is not set
+# CONFIG_ARCH_CHIP_SAMD21J18A is not set
+CONFIG_ARCH_FAMILY_SAMD21=y
+# CONFIG_ARCH_FAMILY_SAMD21E is not set
+# CONFIG_ARCH_FAMILY_SAMD21G is not set
+CONFIG_ARCH_FAMILY_SAMD21J=y
+# CONFIG_ARCH_FAMILY_SAMD21 is not set
+# CONFIG_ARCH_FAMILY_SAMD21E is not set
+# CONFIG_ARCH_FAMILY_SAMD21G is not set
+# CONFIG_ARCH_FAMILY_SAMD21J is not set
+# CONFIG_ARCH_FAMILY_SAML21 is not set
+# CONFIG_ARCH_FAMILY_SAML21E is not set
+# CONFIG_ARCH_FAMILY_SAML21G is not set
+# CONFIG_ARCH_FAMILY_SAML21J is not set
+
+#
+# SAMD/L Peripheral Support
+#
+# CONFIG_SAMDL_HAVE_DMAC is not set
+CONFIG_SAMDL_HAVE_SERCOM4=y
+CONFIG_SAMDL_HAVE_SERCOM5=y
+CONFIG_SAMDL_HAVE_TC5=y
+CONFIG_SAMDL_HAVE_TC2=y
+CONFIG_SAMDL_HAVE_TC3=y
+CONFIG_SAMDL_HAVE_TC6=y
+CONFIG_SAMDL_HAVE_TC7=y
+# CONFIG_SAMDL_AC is not set
+# CONFIG_SAMDL_ADC is not set
+# CONFIG_SAMDL_DAC is not set
+# CONFIG_SAMDL_EVSYS is not set
+# CONFIG_SAMDL_NVMCTRL is not set
+# CONFIG_SAMDL_PTC is not set
+# CONFIG_SAMDL_RTC is not set
+# CONFIG_SAMDL_SERCOM0 is not set
+# CONFIG_SAMDL_SERCOM1 is not set
+# CONFIG_SAMDL_SERCOM2 is not set
+CONFIG_SAMDL_SERCOM3=y
+CONFIG_SAMDL_SERCOM4=y
+# CONFIG_SAMDL_SERCOM5 is not set
+# CONFIG_SAMDL_TC0 is not set
+# CONFIG_SAMDL_TC1 is not set
+# CONFIG_SAMDL_TC2 is not set
+# CONFIG_SAMDL_TC3 is not set
+# CONFIG_SAMDL_TC4 is not set
+# CONFIG_SAMDL_TC5 is not set
+# CONFIG_SAMDL_TC6 is not set
+# CONFIG_SAMDL_TC7 is not set
+# CONFIG_SAMDL_WDT is not set
+# CONFIG_SAMDL_SERCOM3_ISI2C is not set
+# CONFIG_SAMDL_SERCOM3_ISSPI is not set
+CONFIG_SAMDL_SERCOM3_ISUSART=y
+# CONFIG_SAMDL_SERCOM4_ISI2C is not set
+# CONFIG_SAMDL_SERCOM4_ISSPI is not set
+CONFIG_SAMDL_SERCOM4_ISUSART=y
+
+#
+# Architecture Options
+#
+# CONFIG_ARCH_NOINTC is not set
+# CONFIG_ARCH_VECNOTIRQ is not set
+# CONFIG_ARCH_DMA is not set
+CONFIG_ARCH_HAVE_IRQPRIO=y
+# CONFIG_ARCH_L2CACHE is not set
+# CONFIG_ARCH_HAVE_COHERENT_DCACHE is not set
+# CONFIG_ARCH_HAVE_ADDRENV is not set
+# CONFIG_ARCH_NEED_ADDRENV_MAPPING is not set
+CONFIG_ARCH_HAVE_VFORK=y
+# CONFIG_ARCH_HAVE_MMU is not set
+# CONFIG_ARCH_HAVE_MPU is not set
+# CONFIG_ARCH_NAND_HWECC is not set
+# CONFIG_ARCH_HAVE_EXTCLK is not set
+# CONFIG_ARCH_IRQPRIO is not set
+CONFIG_ARCH_STACKDUMP=y
+# CONFIG_ENDIAN_BIG is not set
+# CONFIG_ARCH_IDLE_CUSTOM is not set
+# CONFIG_ARCH_HAVE_RAMFUNCS is not set
+# CONFIG_ARCH_HAVE_RAMVECTORS is not set
+
+#
+# Board Settings
+#
+CONFIG_BOARD_LOOPSPERMSEC=3410
+# CONFIG_ARCH_CALIBRATION is not set
+
+#
+# Interrupt options
+#
+CONFIG_ARCH_HAVE_INTERRUPTSTACK=y
+CONFIG_ARCH_INTERRUPTSTACK=0
+# CONFIG_ARCH_HAVE_HIPRI_INTERRUPT is not set
+
+#
+# Boot options
+#
+# CONFIG_BOOT_RUNFROMEXTSRAM is not set
+CONFIG_BOOT_RUNFROMFLASH=y
+# CONFIG_BOOT_RUNFROMISRAM is not set
+# CONFIG_BOOT_RUNFROMSDRAM is not set
+# CONFIG_BOOT_COPYTORAM is not set
+
+#
+# Boot Memory Configuration
+#
+CONFIG_RAM_START=0x20000000
+CONFIG_RAM_SIZE=32768
+# CONFIG_ARCH_HAVE_SDRAM is not set
+
+#
+# Board Selection
+#
+CONFIG_ARCH_BOARD_SAMD21_XPLAINED=y
+# CONFIG_ARCH_BOARD_CUSTOM is not set
+CONFIG_ARCH_BOARD="samd21-xplained"
+
+#
+# Common Board Options
+#
+CONFIG_ARCH_HAVE_LEDS=y
+CONFIG_ARCH_LEDS=y
+CONFIG_ARCH_HAVE_BUTTONS=y
+CONFIG_ARCH_BUTTONS=y
+CONFIG_ARCH_HAVE_IRQBUTTONS=y
+# CONFIG_ARCH_IRQBUTTONS is not set
+CONFIG_NSH_MMCSDMINOR=0
+
+#
+# Board-Specific Options
+#
+
+#
+# SAMD21 Xplained Pro Modules
+#
+# CONFIG_SAMD21_XPLAINED_IOMODULE is not set
+# CONFIG_SAMD21_XPLAINED_OLED1MODULE is not set
+# CONFIG_SAMD21_XPLAINED_USART4_EXT1 is not set
+# CONFIG_SAMD21_XPLAINED_USART4_EXT2 is not set
+CONFIG_SAMD21_XPLAINED_USART4_EXT3=y
+# CONFIG_LIB_BOARDCTL is not set
+
+#
+# RTOS Features
+#
+CONFIG_DISABLE_OS_API=y
+# CONFIG_DISABLE_POSIX_TIMERS is not set
+# CONFIG_DISABLE_PTHREAD is not set
+# CONFIG_DISABLE_SIGNALS is not set
+# CONFIG_DISABLE_MQUEUE is not set
+CONFIG_DISABLE_ENVIRON=y
+
+#
+# Clocks and Timers
+#
+CONFIG_USEC_PER_TICK=10000
+# CONFIG_SYSTEM_TIME64 is not set
+# CONFIG_CLOCK_MONOTONIC is not set
+# CONFIG_JULIAN_TIME is not set
+CONFIG_START_YEAR=2014
+CONFIG_START_MONTH=2
+CONFIG_START_DAY=12
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_PREALLOC_WDOGS=4
+CONFIG_WDOG_INTRESERVE=0
+CONFIG_PREALLOC_TIMERS=4
+
+#
+# Tasks and Scheduling
+#
+# CONFIG_INIT_NONE is not set
+CONFIG_INIT_ENTRYPOINT=y
+# CONFIG_INIT_FILEPATH is not set
+CONFIG_USER_ENTRYPOINT="nsh_main"
+CONFIG_RR_INTERVAL=200
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_MAX_TASKS=16
+# CONFIG_SCHED_HAVE_PARENT is not set
+CONFIG_SCHED_WAITPID=y
+
+#
+# Pthread Options
+#
+# CONFIG_MUTEX_TYPES is not set
+CONFIG_NPTHREAD_KEYS=4
+
+#
+# Performance Monitoring
+#
+# CONFIG_SCHED_CPULOAD is not set
+# CONFIG_SCHED_INSTRUMENTATION is not set
+
+#
+# Files and I/O
+#
+CONFIG_DEV_CONSOLE=y
+# CONFIG_FDCLONE_DISABLE is not set
+# CONFIG_FDCLONE_STDIO is not set
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NAME_MAX=32
+# CONFIG_PRIORITY_INHERITANCE is not set
+
+#
+# RTOS hooks
+#
+# CONFIG_BOARD_INITIALIZE is not set
+# CONFIG_SCHED_STARTHOOK is not set
+# CONFIG_SCHED_ATEXIT is not set
+# CONFIG_SCHED_ONEXIT is not set
+
+#
+# Signal Numbers
+#
+CONFIG_SIG_SIGUSR1=1
+CONFIG_SIG_SIGUSR2=2
+CONFIG_SIG_SIGALARM=3
+CONFIG_SIG_SIGCONDTIMEDOUT=16
+
+#
+# POSIX Message Queue Options
+#
+CONFIG_PREALLOC_MQ_MSGS=4
+CONFIG_MQ_MAXMSGSIZE=32
+
+#
+# Work Queue Support
+#
+# CONFIG_SCHED_WORKQUEUE is not set
+# CONFIG_SCHED_HPWORK is not set
+# CONFIG_SCHED_LPWORK is not set
+
+#
+# Stack and heap information
+#
+CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1536
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=1536
+# CONFIG_LIB_SYSCALL is not set
+
+#
+# Device Drivers
+#
+CONFIG_DISABLE_POLL=y
+CONFIG_DEV_NULL=y
+# CONFIG_DEV_ZERO is not set
+# CONFIG_LOOP is not set
+
+#
+# Buffering
+#
+# CONFIG_DRVR_WRITEBUFFER is not set
+# CONFIG_DRVR_READAHEAD is not set
+# CONFIG_RAMDISK is not set
+# CONFIG_CAN is not set
+# CONFIG_ARCH_HAVE_PWM_PULSECOUNT is not set
+# CONFIG_PWM is not set
+# CONFIG_ARCH_HAVE_I2CRESET is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_I2S is not set
+
+#
+# Timer Driver Support
+#
+# CONFIG_TIMER is not set
+# CONFIG_RTC is not set
+# CONFIG_WATCHDOG is not set
+# CONFIG_ANALOG is not set
+# CONFIG_AUDIO_DEVICES is not set
+# CONFIG_VIDEO_DEVICES is not set
+# CONFIG_BCH is not set
+# CONFIG_INPUT is not set
+# CONFIG_LCD is not set
+# CONFIG_MMCSD is not set
+# CONFIG_MTD is not set
+# CONFIG_EEPROM is not set
+# CONFIG_PIPES is not set
+# CONFIG_PM is not set
+# CONFIG_POWER is not set
+# CONFIG_SENSORS is not set
+# CONFIG_SERCOMM_CONSOLE is not set
+CONFIG_SERIAL=y
+# CONFIG_DEV_LOWCONSOLE is not set
+# CONFIG_16550_UART is not set
+# CONFIG_ARCH_HAVE_UART is not set
+# CONFIG_ARCH_HAVE_UART0 is not set
+# CONFIG_ARCH_HAVE_UART1 is not set
+# CONFIG_ARCH_HAVE_UART2 is not set
+# CONFIG_ARCH_HAVE_UART3 is not set
+# CONFIG_ARCH_HAVE_UART4 is not set
+# CONFIG_ARCH_HAVE_UART5 is not set
+# CONFIG_ARCH_HAVE_UART6 is not set
+# CONFIG_ARCH_HAVE_UART7 is not set
+# CONFIG_ARCH_HAVE_UART8 is not set
+# CONFIG_ARCH_HAVE_SCI0 is not set
+# CONFIG_ARCH_HAVE_SCI1 is not set
+# CONFIG_ARCH_HAVE_USART0 is not set
+# CONFIG_ARCH_HAVE_USART1 is not set
+# CONFIG_ARCH_HAVE_USART2 is not set
+CONFIG_ARCH_HAVE_USART3=y
+CONFIG_ARCH_HAVE_USART4=y
+# CONFIG_ARCH_HAVE_USART5 is not set
+# CONFIG_ARCH_HAVE_USART6 is not set
+# CONFIG_ARCH_HAVE_USART7 is not set
+# CONFIG_ARCH_HAVE_USART8 is not set
+# CONFIG_ARCH_HAVE_OTHER_UART is not set
+
+#
+# USART Configuration
+#
+CONFIG_USART3_ISUART=y
+CONFIG_USART4_ISUART=y
+CONFIG_MCU_SERIAL=y
+CONFIG_STANDARD_SERIAL=y
+# CONFIG_SERIAL_IFLOWCONTROL is not set
+# CONFIG_SERIAL_OFLOWCONTROL is not set
+# CONFIG_ARCH_HAVE_SERIAL_TERMIOS is not set
+# CONFIG_USART3_SERIAL_CONSOLE is not set
+CONFIG_USART4_SERIAL_CONSOLE=y
+# CONFIG_OTHER_SERIAL_CONSOLE is not set
+# CONFIG_NO_SERIAL_CONSOLE is not set
+
+#
+# USART3 Configuration
+#
+CONFIG_USART3_RXBUFSIZE=64
+CONFIG_USART3_TXBUFSIZE=64
+CONFIG_USART3_BAUD=115200
+CONFIG_USART3_BITS=8
+CONFIG_USART3_PARITY=0
+CONFIG_USART3_2STOP=0
+# CONFIG_USART3_IFLOWCONTROL is not set
+# CONFIG_USART3_OFLOWCONTROL is not set
+
+#
+# USART4 Configuration
+#
+CONFIG_USART4_RXBUFSIZE=64
+CONFIG_USART4_TXBUFSIZE=64
+CONFIG_USART4_BAUD=115200
+CONFIG_USART4_BITS=8
+CONFIG_USART4_PARITY=0
+CONFIG_USART4_2STOP=0
+# CONFIG_USART4_IFLOWCONTROL is not set
+# CONFIG_USART4_OFLOWCONTROL is not set
+# CONFIG_USBDEV is not set
+# CONFIG_USBHOST is not set
+# CONFIG_WIRELESS is not set
+
+#
+# System Logging Device Options
+#
+
+#
+# System Logging
+#
+# CONFIG_RAMLOG is not set
+# CONFIG_SYSLOG_CONSOLE is not set
+
+#
+# Networking Support
+#
+# CONFIG_ARCH_HAVE_NET is not set
+# CONFIG_ARCH_HAVE_PHY is not set
+# CONFIG_NET is not set
+
+#
+# Crypto API
+#
+# CONFIG_CRYPTO is not set
+
+#
+# File Systems
+#
+
+#
+# File system configuration
+#
+# CONFIG_DISABLE_MOUNTPOINT is not set
+# CONFIG_FS_AUTOMOUNTER is not set
+CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y
+# CONFIG_FS_READABLE is not set
+# CONFIG_FS_WRITABLE is not set
+# CONFIG_FS_NAMED_SEMAPHORES is not set
+CONFIG_FS_MQUEUE_MPATH="/var/mqueue"
+# CONFIG_FS_RAMMAP is not set
+# CONFIG_FS_FAT is not set
+# CONFIG_FS_NXFFS is not set
+# CONFIG_FS_ROMFS is not set
+# CONFIG_FS_SMARTFS is not set
+# CONFIG_FS_BINFS is not set
+# CONFIG_FS_PROCFS is not set
+# CONFIG_FS_UNIONFS is not set
+
+#
+# System Logging
+#
+# CONFIG_SYSLOG is not set
+# CONFIG_SYSLOG_TIMESTAMP is not set
+
+#
+# Graphics Support
+#
+# CONFIG_NX is not set
+
+#
+# Memory Management
+#
+# CONFIG_MM_SMALL is not set
+CONFIG_MM_REGIONS=1
+# CONFIG_ARCH_HAVE_HEAP2 is not set
+# CONFIG_GRAN is not set
+
+#
+# Audio Support
+#
+# CONFIG_AUDIO is not set
+
+#
+# Binary Loader
+#
+# CONFIG_BINFMT_DISABLE is not set
+# CONFIG_NXFLAT is not set
+# CONFIG_ELF is not set
+CONFIG_BUILTIN=y
+# CONFIG_PIC is not set
+# CONFIG_SYMTAB_ORDEREDBYNAME is not set
+
+#
+# Library Routines
+#
+
+#
+# Standard C Library Options
+#
+CONFIG_STDIO_BUFFER_SIZE=64
+CONFIG_STDIO_LINEBUFFER=y
+CONFIG_NUNGET_CHARS=2
+# CONFIG_LIBM is not set
+# CONFIG_NOPRINTF_FIELDWIDTH is not set
+# CONFIG_LIBC_FLOATINGPOINT is not set
+# CONFIG_LIBC_LONG_LONG is not set
+# CONFIG_LIBC_IOCTL_VARIADIC is not set
+CONFIG_LIB_RAND_ORDER=1
+# CONFIG_EOL_IS_CR is not set
+# CONFIG_EOL_IS_LF is not set
+# CONFIG_EOL_IS_BOTH_CRLF is not set
+CONFIG_EOL_IS_EITHER_CRLF=y
+# CONFIG_LIBC_EXECFUNCS is not set
+CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=1024
+CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=1536
+# CONFIG_LIBC_STRERROR is not set
+# CONFIG_LIBC_PERROR_STDOUT is not set
+CONFIG_ARCH_LOWPUTC=y
+# CONFIG_TIME_EXTENDED is not set
+CONFIG_LIB_SENDFILE_BUFSIZE=512
+# CONFIG_ARCH_ROMGETC is not set
+# CONFIG_ARCH_OPTIMIZED_FUNCTIONS is not set
+
+#
+# Non-standard Library Support
+#
+# CONFIG_LIB_KBDCODEC is not set
+# CONFIG_LIB_SLCDCODEC is not set
+
+#
+# Basic CXX Support
+#
+# CONFIG_C99_BOOL8 is not set
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+# CONFIG_CXX_NEWLONG is not set
+
+#
+# uClibc++ Standard C++ Library
+#
+# CONFIG_UCLIBCXX is not set
+
+#
+# Application Configuration
+#
+
+#
+# Built-In Applications
+#
+CONFIG_BUILTIN_PROXY_STACKSIZE=1024
+
+#
+# Examples
+#
+# CONFIG_EXAMPLES_BUTTONS is not set
+# CONFIG_EXAMPLES_CAN is not set
+# CONFIG_EXAMPLES_CONFIGDATA is not set
+# CONFIG_EXAMPLES_CPUHOG is not set
+# CONFIG_EXAMPLES_CXXTEST is not set
+# CONFIG_EXAMPLES_DHCPD is not set
+# CONFIG_EXAMPLES_ELF is not set
+# CONFIG_EXAMPLES_FTPC is not set
+# CONFIG_EXAMPLES_FTPD is not set
+# CONFIG_EXAMPLES_HELLO is not set
+# CONFIG_EXAMPLES_HELLOXX is not set
+# CONFIG_EXAMPLES_JSON is not set
+# CONFIG_EXAMPLES_HIDKBD is not set
+# CONFIG_EXAMPLES_KEYPADTEST is not set
+# CONFIG_EXAMPLES_IGMP is not set
+# CONFIG_EXAMPLES_MM is not set
+# CONFIG_EXAMPLES_MODBUS is not set
+# CONFIG_EXAMPLES_MOUNT is not set
+# CONFIG_EXAMPLES_NRF24L01TERM is not set
+CONFIG_EXAMPLES_NSH=y
+CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y
+# CONFIG_EXAMPLES_NULL is not set
+# CONFIG_EXAMPLES_NX is not set
+# CONFIG_EXAMPLES_NXTERM is not set
+# CONFIG_EXAMPLES_NXFFS is not set
+# CONFIG_EXAMPLES_NXHELLO is not set
+# CONFIG_EXAMPLES_NXIMAGE is not set
+# CONFIG_EXAMPLES_NXLINES is not set
+# CONFIG_EXAMPLES_NXTEXT is not set
+# CONFIG_EXAMPLES_OSTEST is not set
+# CONFIG_EXAMPLES_PIPE is not set
+# CONFIG_EXAMPLES_PPPD is not set
+# CONFIG_EXAMPLES_POSIXSPAWN is not set
+# CONFIG_EXAMPLES_QENCODER is not set
+# CONFIG_EXAMPLES_RGMP is not set
+# CONFIG_EXAMPLES_SENDMAIL is not set
+# CONFIG_EXAMPLES_SERIALBLASTER is not set
+# CONFIG_EXAMPLES_SERIALRX is not set
+# CONFIG_EXAMPLES_SERLOOP is not set
+# CONFIG_EXAMPLES_SLCD is not set
+# CONFIG_EXAMPLES_SMART_TEST is not set
+# CONFIG_EXAMPLES_SMART is not set
+# CONFIG_EXAMPLES_TCPECHO is not set
+# CONFIG_EXAMPLES_TELNETD is not set
+# CONFIG_EXAMPLES_TIFF is not set
+# CONFIG_EXAMPLES_TOUCHSCREEN is not set
+# CONFIG_EXAMPLES_WEBSERVER is not set
+# CONFIG_EXAMPLES_USBSERIAL is not set
+# CONFIG_EXAMPLES_USBTERM is not set
+# CONFIG_EXAMPLES_WATCHDOG is not set
+
+#
+# Graphics Support
+#
+# CONFIG_TIFF is not set
+# CONFIG_GRAPHICS_TRAVELER is not set
+
+#
+# Interpreters
+#
+# CONFIG_INTERPRETERS_FICL is not set
+# CONFIG_INTERPRETERS_PCODE is not set
+# CONFIG_INTERPRETERS_MICROPYTHON is not set
+
+#
+# Network Utilities
+#
+
+#
+# Networking Utilities
+#
+# CONFIG_NETUTILS_CODECS is not set
+# CONFIG_NETUTILS_FTPC is not set
+# CONFIG_NETUTILS_JSON is not set
+# CONFIG_NETUTILS_SMTP is not set
+
+#
+# FreeModBus
+#
+# CONFIG_MODBUS is not set
+
+#
+# NSH Library
+#
+CONFIG_NSH_LIBRARY=y
+
+#
+# Command Line Configuration
+#
+CONFIG_NSH_READLINE=y
+# CONFIG_NSH_CLE is not set
+CONFIG_NSH_LINELEN=64
+# CONFIG_NSH_DISABLE_SEMICOLON is not set
+# CONFIG_NSH_CMDPARMS is not set
+CONFIG_NSH_MAXARGUMENTS=6
+# CONFIG_NSH_ARGCAT is not set
+CONFIG_NSH_NESTDEPTH=3
+# CONFIG_NSH_DISABLEBG is not set
+CONFIG_NSH_BUILTIN_APPS=y
+
+#
+# Disable Individual commands
+#
+# CONFIG_NSH_DISABLE_ADDROUTE is not set
+# CONFIG_NSH_DISABLE_CAT is not set
+# CONFIG_NSH_DISABLE_CD is not set
+# CONFIG_NSH_DISABLE_CP is not set
+# CONFIG_NSH_DISABLE_CMP is not set
+CONFIG_NSH_DISABLE_DATE=y
+# CONFIG_NSH_DISABLE_DD is not set
+CONFIG_NSH_DISABLE_DF=y
+# CONFIG_NSH_DISABLE_DELROUTE is not set
+# CONFIG_NSH_DISABLE_ECHO is not set
+# CONFIG_NSH_DISABLE_EXEC is not set
+# CONFIG_NSH_DISABLE_EXIT is not set
+# CONFIG_NSH_DISABLE_FREE is not set
+# CONFIG_NSH_DISABLE_GET is not set
+# CONFIG_NSH_DISABLE_HELP is not set
+# CONFIG_NSH_DISABLE_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_KILL is not set
+# CONFIG_NSH_DISABLE_LOSETUP is not set
+# CONFIG_NSH_DISABLE_LS is not set
+# CONFIG_NSH_DISABLE_MB is not set
+# CONFIG_NSH_DISABLE_MKDIR is not set
+# CONFIG_NSH_DISABLE_MKFIFO is not set
+# CONFIG_NSH_DISABLE_MKRD is not set
+# CONFIG_NSH_DISABLE_MH is not set
+# CONFIG_NSH_DISABLE_MOUNT is not set
+# CONFIG_NSH_DISABLE_MV is not set
+# CONFIG_NSH_DISABLE_MW is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_NSH_DISABLE_PUT is not set
+# CONFIG_NSH_DISABLE_PWD is not set
+# CONFIG_NSH_DISABLE_RM is not set
+# CONFIG_NSH_DISABLE_RMDIR is not set
+# CONFIG_NSH_DISABLE_SET is not set
+# CONFIG_NSH_DISABLE_SH is not set
+# CONFIG_NSH_DISABLE_SLEEP is not set
+# CONFIG_NSH_DISABLE_TEST is not set
+# CONFIG_NSH_DISABLE_UMOUNT is not set
+# CONFIG_NSH_DISABLE_UNSET is not set
+# CONFIG_NSH_DISABLE_USLEEP is not set
+# CONFIG_NSH_DISABLE_WGET is not set
+# CONFIG_NSH_DISABLE_XD is not set
+
+#
+# Configure Command Options
+#
+CONFIG_NSH_CODECS_BUFSIZE=128
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_NSH_FILEIOSIZE=512
+
+#
+# Scripting Support
+#
+# CONFIG_NSH_DISABLESCRIPT is not set
+# CONFIG_NSH_DISABLE_ITEF is not set
+# CONFIG_NSH_DISABLE_LOOPS is not set
+
+#
+# Console Configuration
+#
+CONFIG_NSH_CONSOLE=y
+# CONFIG_NSH_ALTCONDEV is not set
+# CONFIG_NSH_ARCHINIT is not set
+
+#
+# NxWidgets/NxWM
+#
+
+#
+# Platform-specific Support
+#
+# CONFIG_PLATFORM_CONFIGDATA is not set
+
+#
+# System Libraries and NSH Add-Ons
+#
+# CONFIG_SYSTEM_FREE is not set
+# CONFIG_SYSTEM_CLE is not set
+# CONFIG_SYSTEM_CUTERM is not set
+# CONFIG_SYSTEM_INSTALL is not set
+# CONFIG_SYSTEM_HEX2BIN is not set
+# CONFIG_SYSTEM_INIFILE is not set
+# CONFIG_SYSTEM_RAMTEST is not set
+CONFIG_SYSTEM_READLINE=y
+CONFIG_READLINE_ECHO=y
+# CONFIG_SYSTEM_POWEROFF is not set
+# CONFIG_SYSTEM_RAMTRON is not set
+# CONFIG_SYSTEM_SDCARD is not set
+# CONFIG_SYSTEM_SUDOKU is not set
+# CONFIG_SYSTEM_SYSINFO is not set
+# CONFIG_SYSTEM_VI is not set
+# CONFIG_SYSTEM_ZMODEM is not set
diff --git a/configs/samd21-xplained/nsh/setenv.sh b/configs/samd21-xplained/nsh/setenv.sh
new file mode 100755
index 0000000000..a2d526f54c
--- /dev/null
+++ b/configs/samd21-xplained/nsh/setenv.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+# configs/samd21-xplained/nsh/setenv.sh
+#
+# Copyright (C) 2014 Gregory Nutt. All rights reserved.
+# Author: Gregory Nutt
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+# used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+if [ "$_" = "$0" ] ; then
+ echo "You must source this script, not run it!" 1>&2
+ exit 1
+fi
+
+WD=`pwd`
+if [ ! -x "setenv.sh" ]; then
+ echo "This script must be executed from the top-level NuttX build directory"
+ exit 1
+fi
+
+if [ -z "${PATH_ORIG}" ]; then
+ export PATH_ORIG="${PATH}"
+fi
+
+# This is the Cygwin path to the location where I installed the Atmel GCC
+# toolchain under Windows. You will also have to edit this if you install
+# this toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
+
+# This is the Cygwin path to the location where I installed the CodeSourcery
+# toolchain under windows. You will also have to edit this if you install
+# the CodeSourcery toolchain in any other location
+#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
+export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+#export TOOLCHAIN_BIN="/cygdrive/c/Users/MyName/MentorGraphics/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
+
+# These are the Cygwin paths to the locations where I installed the Atollic
+# toolchain under windows. You will also have to edit this if you install
+# the Atollic toolchain in any other location. /usr/bin is added before
+# the Atollic bin path because there is are binaries named gcc.exe and g++.exe
+# at those locations as well.
+#export TOOLCHAIN_BIN="/usr/bin:/cygdrive/c/Program Files (x86)/Atollic/TrueSTUDIO for ARM Pro 2.3.0/ARMTools/bin"
+
+# This is the Cygwin path to the location where I build the buildroot
+# toolchain.
+# export TOOLCHAIN_BIN="${WD}/../misc/buildroot/build_arm_nofpu/staging_dir/bin"
+
+# Add the path to the toolchain to the PATH varialble
+export PATH="${TOOLCHAIN_BIN}:/sbin:/usr/sbin:${PATH_ORIG}"
+
+echo "PATH : ${PATH}"
diff --git a/configs/samd21-xplained/scripts/flash.ld b/configs/samd21-xplained/scripts/flash.ld
new file mode 100755
index 0000000000..286ac9be4e
--- /dev/null
+++ b/configs/samd21-xplained/scripts/flash.ld
@@ -0,0 +1,123 @@
+/****************************************************************************
+ * configs/samd21-xplained/scripts/flash.ld
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* The ATSAMD21J18A has 256KB of FLASH beginning at address 0x0000:0000 and
+ * 32KB of SRAM beginning at address 0x2000:0000
+ */
+
+MEMORY
+{
+ flash (rx) : ORIGIN = 0x00000000, LENGTH = 256K
+ sram (rwx) : ORIGIN = 0x20000000, LENGTH = 32K
+}
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+ENTRY(_stext)
+
+SECTIONS
+{
+ .text : {
+ _stext = ABSOLUTE(.);
+ *(.vectors)
+ *(.text .text.*)
+ *(.fixup)
+ *(.gnu.warning)
+ *(.rodata .rodata.*)
+ *(.gnu.linkonce.t.*)
+ *(.glue_7)
+ *(.glue_7t)
+ *(.got)
+ *(.gcc_except_table)
+ *(.gnu.linkonce.r.*)
+ _etext = ABSOLUTE(.);
+ } > flash
+
+ .init_section : {
+ _sinit = ABSOLUTE(.);
+ *(.init_array .init_array.*)
+ _einit = ABSOLUTE(.);
+ } > flash
+
+ .ARM.extab : {
+ *(.ARM.extab*)
+ } >flash
+
+ __exidx_start = ABSOLUTE(.);
+ .ARM.exidx : {
+ *(.ARM.exidx*)
+ } >flash
+ __exidx_end = ABSOLUTE(.);
+
+ .data : {
+ _sdata = ABSOLUTE(.);
+ *(.data .data.*)
+ *(.gnu.linkonce.d.*)
+ CONSTRUCTORS
+ _edata = ABSOLUTE(.);
+ } > sram AT > flash
+
+ _eronly = LOADADDR(.data);
+
+ .ramfunc ALIGN(4): {
+ _sramfuncs = ABSOLUTE(.);
+ *(.ramfunc .ramfunc.*)
+ _eramfuncs = ABSOLUTE(.);
+ } > sram AT > flash
+
+ _framfuncs = LOADADDR(.ramfunc);
+
+ .bss : {
+ _sbss = ABSOLUTE(.);
+ *(.bss .bss.*)
+ *(.gnu.linkonce.b.*)
+ *(COMMON)
+ _ebss = ABSOLUTE(.);
+ } > sram
+
+ /* Stabs debugging sections. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
+ .stab.excl 0 : { *(.stab.excl) }
+ .stab.exclstr 0 : { *(.stab.exclstr) }
+ .stab.index 0 : { *(.stab.index) }
+ .stab.indexstr 0 : { *(.stab.indexstr) }
+ .comment 0 : { *(.comment) }
+ .debug_abbrev 0 : { *(.debug_abbrev) }
+ .debug_info 0 : { *(.debug_info) }
+ .debug_line 0 : { *(.debug_line) }
+ .debug_pubnames 0 : { *(.debug_pubnames) }
+ .debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/configs/samd21-xplained/src/.gitignore b/configs/samd21-xplained/src/.gitignore
new file mode 100644
index 0000000000..726d936e1e
--- /dev/null
+++ b/configs/samd21-xplained/src/.gitignore
@@ -0,0 +1,2 @@
+/.depend
+/Make.dep
diff --git a/configs/samd21-xplained/src/Makefile b/configs/samd21-xplained/src/Makefile
new file mode 100644
index 0000000000..1633c59e39
--- /dev/null
+++ b/configs/samd21-xplained/src/Makefile
@@ -0,0 +1,118 @@
+############################################################################
+# configs/samd21-xplained/src/Makefile
+#
+# Copyright (C) 2014 Gregory Nutt. All rights reserved.
+# Author: Gregory Nutt
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+# used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+
+CFLAGS += -I$(TOPDIR)/sched
+
+ASRCS =
+AOBJS = $(ASRCS:.S=$(OBJEXT))
+
+CSRCS = sam_boot.c
+
+ifeq ($(CONFIG_HAVE_CXX),y)
+CSRCS += sam_cxxinitialize.c
+endif
+
+ifeq ($(CONFIG_SAMDL_SERCOM0),y)
+CSRCS += sam_spi.c
+endif
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += sam_autoleds.c
+else
+CSRCS += sam_userleds.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += sam_buttons.c
+endif
+
+ifeq ($(CONFIG_NSH_ARCHINIT),y)
+CSRCS += sam_nsh.c
+endif
+
+ifeq ($(CONFIG_SAMD21_XPLAINED_IOMODULE),y)
+CSRCS += sam_mmcsd.c
+endif
+
+ifeq ($(CONFIG_SAMD21_XPLAINED_OLED1MODULE),y)
+ifeq ($(CONFIG_LCD_UG2832HSWEG04),y)
+CSRCS += sam_ug2832hsweg04.c
+endif
+endif
+
+COBJS = $(CSRCS:.c=$(OBJEXT))
+
+SRCS = $(ASRCS) $(CSRCS)
+OBJS = $(AOBJS) $(COBJS)
+
+ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
+ifeq ($(WINTOOL),y)
+ CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
+ CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
+ CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
+else
+ CFLAGS += -I$(ARCH_SRCDIR)/chip
+ CFLAGS += -I$(ARCH_SRCDIR)/common
+ CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
+endif
+
+all: libboard$(LIBEXT)
+
+$(AOBJS): %$(OBJEXT): %.S
+ $(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
+ $(call COMPILE, $<, $@)
+
+libboard$(LIBEXT): $(OBJS)
+ $(call ARCHIVE, $@, $(OBJS))
+
+.depend: Makefile $(SRCS)
+ $(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+ $(Q) touch $@
+
+depend: .depend
+
+clean:
+ $(call DELFILE, libboard$(LIBEXT))
+ $(call CLEAN)
+
+distclean: clean
+ $(call DELFILE, Make.dep)
+ $(call DELFILE, .depend)
+
+-include Make.dep
diff --git a/configs/samd21-xplained/src/sam_autoleds.c b/configs/samd21-xplained/src/sam_autoleds.c
new file mode 100644
index 0000000000..29adc557b6
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_autoleds.c
@@ -0,0 +1,178 @@
+/****************************************************************************
+ * configs/samd21-xplained/src/sam_autoleds.c
+ *
+ * Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* There are three LEDs on board the SAMD21 Xplained Pro board: The EDBG
+ * controls two of the LEDs, a power LED and a status LED. There is only
+ * one user controllable LED, a yellow LED labelled STATUS near the SAMD21 USB
+ * connector.
+ *
+ * This LED is controlled by PB30 and the LED can be activated by driving PB30
+ * to GND.
+ *
+ * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ * control the LED as follows:
+ *
+ * SYMBOL Meaning LED
+ * ------------------- ----------------------- ------
+ * LED_STARTED NuttX has been started OFF
+ * LED_HEAPALLOCATE Heap has been allocated OFF
+ * LED_IRQSENABLED Interrupts enabled OFF
+ * LED_STACKCREATED Idle stack created ON
+ * LED_INIRQ In an interrupt** N/C
+ * LED_SIGNAL In a signal handler*** N/C
+ * LED_ASSERTION An assertion failed N/C
+ * LED_PANIC The system has crashed FLASH
+ *
+ * Thus if the LED is statically on, NuttX has successfully booted and is,
+ * apparently, running normally. If the LED is flashing at approximately
+ * 2Hz, then a fatal error has been detected and the system has halted.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+#include
+#include
+
+#include
+#include
+
+#include "sam_port.h"
+#include "samd21-xplained.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+# define leddbg lldbg
+# define ledvdbg llvdbg
+#else
+# define leddbg(x...)
+# define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_led_initialize
+ ****************************************************************************/
+
+void board_led_initialize(void)
+{
+ (void)sam_configport(PORT_STATUS_LED);
+}
+
+/****************************************************************************
+ * Name: board_led_on
+ ****************************************************************************/
+
+void board_led_on(int led)
+{
+ bool ledstate = true;
+
+ switch (led)
+ {
+ case 0: /* LED_STARTED: NuttX has been started STATUS LED=OFF */
+ /* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF */
+ /* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF */
+ break; /* Leave ledstate == true to turn OFF */
+
+ default:
+ case 2: /* LED_INIRQ: In an interrupt STATUS LED=N/C */
+ /* LED_SIGNAL: In a signal handler STATUS LED=N/C */
+ /* LED_ASSERTION: An assertion failed STATUS LED=N/C */
+ return; /* Return to leave STATUS LED unchanged */
+
+ case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
+ case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=ON */
+ ledstate = false; /* Set ledstate == false to turn ON */
+ break;
+ }
+
+ sam_portwrite(PORT_STATUS_LED, ledstate);
+}
+
+/****************************************************************************
+ * Name: board_led_off
+ ****************************************************************************/
+
+void board_led_off(int led)
+{
+ switch (led)
+ {
+ /* These should not happen and are ignored */
+
+ default:
+ case 0: /* LED_STARTED: NuttX has been started STATUS LED=OFF */
+ /* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=OFF */
+ /* LED_IRQSENABLED: Interrupts enabled STATUS LED=OFF */
+ case 1: /* LED_STACKCREATED: Idle stack created STATUS LED=ON */
+
+ /* These result in no-change */
+
+ case 2: /* LED_INIRQ: In an interrupt STATUS LED=N/C */
+ /* LED_SIGNAL: In a signal handler STATUS LED=N/C */
+ /* LED_ASSERTION: An assertion failed STATUS LED=N/C */
+ return; /* Return to leave STATUS LED unchanged */
+
+ /* Turn STATUS LED off set driving the output high */
+
+ case 3: /* LED_PANIC: The system has crashed STATUS LED=FLASH */
+ sam_portwrite(PORT_STATUS_LED, true);
+ break;
+ }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/configs/samd21-xplained/src/sam_boot.c b/configs/samd21-xplained/src/sam_boot.c
new file mode 100644
index 0000000000..02fe572a59
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_boot.c
@@ -0,0 +1,89 @@
+/************************************************************************************
+ * configs/samd21-xplained/src/sam_boot.c
+ *
+ * Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include
+
+#include
+
+#include
+
+#include "sam_config.h"
+#include "samd21-xplained.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_boardinitialize
+ *
+ * Description:
+ * All SAM3U architectures must provide the following entry point. This entry point
+ * is called early in the initialization -- after all memory has been configured
+ * and mapped but before any devices have been initialized.
+ *
+ ************************************************************************************/
+
+void sam_boardinitialize(void)
+{
+ /* Configure SPI chip selects if 1) SPI is not disabled, and 2) the weak function
+ * sam_spiinitialize() has been brought into the link.
+ */
+
+#ifdef SAMDL_HAVE_SPI
+ if (sam_spiinitialize)
+ {
+ sam_spiinitialize();
+ }
+#endif
+
+ /* Configure on-board LEDs if LED support has been selected. */
+
+#ifdef CONFIG_ARCH_LEDS
+ board_led_initialize();
+#endif
+}
diff --git a/configs/samd21-xplained/src/sam_buttons.c b/configs/samd21-xplained/src/sam_buttons.c
new file mode 100644
index 0000000000..e862b925dc
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_buttons.c
@@ -0,0 +1,160 @@
+/****************************************************************************
+ * configs/samd21-xplained/src/sam_buttons.c
+ *
+ * Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+
+#include
+#include
+#include
+
+#include
+#include
+
+#include "sam_port.h"
+#include "samd21-xplained.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if defined(CONFIG_PORTA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+static xcpt_t g_irqsw0;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ * board_button_initialize() must be called to initialize button resources.
+ * After that, board_buttons() may be called to collect the current state of
+ * all buttons or board_button_irq() may be called to register button
+ * interrupt handlers.
+ *
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+ (void)sam_configport(PORT_SW0);
+}
+
+/************************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ * After board_button_initialize() has been called, board_buttons() may be called to collect
+ * the state of all buttons. board_buttons() returns an 8-bit bit set with each bit
+ * associated with a button. See the BUTTON* definitions above for the meaning of
+ * each bit in the returned value.
+ *
+ ************************************************************************************/
+
+uint8_t board_buttons(void)
+{
+ return sam_portread(PORT_SW0) ? 0 : BUTTON_SW0_BIT;
+}
+
+/****************************************************************************
+ * Name: board_button_irq
+ *
+ * Description:
+ * This function may be called to register an interrupt handler that will
+ * be called when a button is depressed or released. The ID value is one
+ * of the BUTTON* definitions provided above. The previous interrupt
+ * handler address isreturned (so that it may restored, if so desired).
+ *
+ * Configuration Notes:
+ * Configuration CONFIG_AVR32_PORTIRQ must be selected to enable the
+ * overall PORT IRQ feature and CONFIG_AVR32_PORTIRQSETA and/or
+ * CONFIG_AVR32_PORTIRQSETB must be enabled to select PORTs to support
+ * interrupts on. For button support, bits 2 and 3 must be set in
+ * CONFIG_AVR32_PORTIRQSETB (PB2 and PB3).
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_PORTA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
+xcpt_t board_button_irq(int id, xcpt_t irqhandler)
+{
+ xcpt_t oldhandler = NULL;
+
+ if (id == BUTTON_SW0)
+ {
+ irqstate_t flags;
+
+ /* Disable interrupts until we are done. This guarantees that the
+ * following operations are atomic.
+ */
+
+ flags = irqsave();
+
+ /* Get the old button interrupt handler and save the new one */
+
+ oldhandler = *g_irqsw0;
+ *g_irqsw0 = irqhandler;
+
+ /* Configure the interrupt */
+
+ sam_portirq(IRQ_SW0);
+ (void)irq_attach(IRQ_SW0, irqhandler);
+ sam_portirqenable(IRQ_SW0);
+ irqrestore(flags);
+ }
+
+ /* Return the old button handler (so that it can be restored) */
+
+ return oldhandler;
+}
+#endif
+
+#endif /* CONFIG_ARCH_BUTTONS */
diff --git a/configs/samd21-xplained/src/sam_cxxinitialize.c b/configs/samd21-xplained/src/sam_cxxinitialize.c
new file mode 100644
index 0000000000..fd57726117
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_cxxinitialize.c
@@ -0,0 +1,150 @@
+/************************************************************************************
+ * configs/samd21-xplained/src/sam_cxxinitialize.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include
+
+#include
+
+#include
+
+#if defined(CONFIG_HAVE_CXX) && defined(CONFIG_HAVE_CXXINITIALIZE)
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Debug ****************************************************************************/
+/* Non-standard debug that may be enabled just for testing the static constructors */
+
+#ifndef CONFIG_DEBUG
+# undef CONFIG_DEBUG_CXX
+#endif
+
+#ifdef CONFIG_DEBUG_CXX
+# define cxxdbg dbg
+# define cxxlldbg lldbg
+# ifdef CONFIG_DEBUG_VERBOSE
+# define cxxvdbg vdbg
+# define cxxllvdbg llvdbg
+# else
+# define cxxvdbg(x...)
+# define cxxllvdbg(x...)
+# endif
+#else
+# define cxxdbg(x...)
+# define cxxlldbg(x...)
+# define cxxvdbg(x...)
+# define cxxllvdbg(x...)
+#endif
+
+/************************************************************************************
+ * Private Types
+ ************************************************************************************/
+/* This type defines one entry in initialization array */
+
+typedef void (*initializer_t)(void);
+
+/************************************************************************************
+ * External references
+ ************************************************************************************/
+/* _sinit and _einit are symbols exported by the linker script that mark the
+ * beginning and the end of the C++ initialization section.
+ */
+
+extern initializer_t _sinit;
+extern initializer_t _einit;
+
+/* _stext and _etext are symbols exported by the linker script that mark the
+ * beginning and the end of text.
+ */
+
+extern uint32_t _stext;
+extern uint32_t _etext;
+
+/************************************************************************************
+ * Private Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/****************************************************************************
+ * Name: up_cxxinitialize
+ *
+ * Description:
+ * If C++ and C++ static constructors are supported, then this function
+ * must be provided by board-specific logic in order to perform
+ * initialization of the static C++ class instances.
+ *
+ * This function should then be called in the application-specific
+ * user_start logic in order to perform the C++ initialization. NOTE
+ * that no component of the core NuttX RTOS logic is involved; This
+ * function defintion only provides the 'contract' between application
+ * specific C++ code and platform-specific toolchain support
+ *
+ ***************************************************************************/
+
+void up_cxxinitialize(void)
+{
+ initializer_t *initp;
+
+ cxxdbg("_sinit: %p _einit: %p _stext: %p _etext: %p\n",
+ &_sinit, &_einit, &_stext, &_etext);
+
+ /* Visit each entry in the initialzation table */
+
+ for (initp = &_sinit; initp != &_einit; initp++)
+ {
+ initializer_t initializer = *initp;
+ cxxdbg("initp: %p initializer: %p\n", initp, initializer);
+
+ /* Make sure that the address is non-NULL and lies in the text region
+ * defined by the linker script. Some toolchains may put NULL values
+ * or counts in the initialization table
+ */
+
+ if ((void*)initializer > (void*)&_stext && (void*)initializer < (void*)&_etext)
+ {
+ cxxdbg("Calling %p\n", initializer);
+ initializer();
+ }
+ }
+}
+
+#endif /* CONFIG_HAVE_CXX && CONFIG_HAVE_CXXINITIALIZE */
diff --git a/configs/samd21-xplained/src/sam_mmcsd.c b/configs/samd21-xplained/src/sam_mmcsd.c
new file mode 100644
index 0000000000..315b13fae9
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_mmcsd.c
@@ -0,0 +1,125 @@
+/****************************************************************************
+ * config/samd21-xplained/src/sam_mmcsd.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+#include
+#include
+
+#include
+#include
+
+#include "sam_config.h"
+#include "samd21-xplained.h"
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#ifdef CONFIG_DISABLE_MOUNTPOINT
+# error Mountpoints are disabled (CONFIG_DISABLE_MOUNTPOINT=y)
+#endif
+
+#ifndef SAMDL_HAVE_SPI0
+# error SERCOM0 SPI support is required
+#endif
+
+#ifndef CONFIG_MMCSD
+# error MMC/SD support is required (CONFIG_MMCSD)
+#endif
+
+#define SAMDL_MMCSDSLOTNO 0 /* There is only one slot */
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_sdinitialize
+ *
+ * Description:
+ * Initialize the SPI-based SD card. Requires
+ * - CONFIG_SAMD21_XPLAINED_IOMODULE=y,
+ * - CONFIG_DISABLE_MOUNTPOINT=n,
+ * - CONFIG_MMCSD=y, and
+ * - SAMDL_HAVE_SPI0=y (CONFIG_SAMDL_SERCOM0 && CONFIG_SAMDL_SERCOM0_ISSPI)
+ *
+ *****************************************************************************/
+
+int sam_sdinitialize(int port, int minor)
+{
+ FAR struct spi_dev_s *spi;
+ int ret;
+
+ /* Get the SPI driver instance for the SD chip select */
+
+ fvdbg("Initializing SERCOM SPI%d\n", port);
+
+ spi = up_spiinitialize(port);
+ if (!spi)
+ {
+ fdbg("Failed to initialize SPI%d\n", port);
+ return -ENODEV;
+ }
+
+ fvdbg("Successfully initialized SPI%d\n", port);
+
+ /* Bind the SPI device for the chip select to the slot */
+
+ fvdbg("Binding SPI%d to MMC/SD slot %d\n", port, SAMDL_MMCSDSLOTNO);
+
+ ret = mmcsd_spislotinitialize(minor, SAMDL_MMCSDSLOTNO, spi);
+ if (ret < 0)
+ {
+ fdbg("Failed to bind SPI%d to MMC/SD slot %d: %d\n",
+ port, SAMDL_MMCSDSLOTNO, ret);
+ return ret;
+ }
+
+ fvdbg("Successfuly bound SPI%d to MMC/SD slot %d\n",
+ port, SAMDL_MMCSDSLOTNO);
+
+ return OK;
+}
+
+#endif /* CONFIG_SAMD21_XPLAINED_IOMODULE */
diff --git a/configs/samd21-xplained/src/sam_nsh.c b/configs/samd21-xplained/src/sam_nsh.c
new file mode 100644
index 0000000000..482e68611a
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_nsh.c
@@ -0,0 +1,125 @@
+/****************************************************************************
+ * config/samd21-xplained/src/sam_nsh.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+#include
+
+#include
+
+#include "sam_config.h"
+#include "samd21-xplained.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Some configuration checks */
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1
+# ifndef SAMDL_HAVE_SPI0
+# error I/O1 module on EXT1 requires SERCOM SPI0
+# undef CONFIG_SAMD21_XPLAINED_IOMODULE
+# endif
+# define SPI_PORTNO 0
+#endif
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2
+# ifndef SAMDL_HAVE_SPI1
+# error I/O1 module on EXT2 requires SERCOM SPI1
+# undef CONFIG_SAMD21_XPLAINED_IOMODULE
+# endif
+# define SPI_PORTNO 1
+#endif
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE
+/* Support for the SD card slot on the I/O1 module */
+/* Verify NSH PORT and SLOT settings */
+
+# define SAMDL_MMCSDSLOTNO 0 /* There is only one slot */
+
+# if defined(CONFIG_NSH_MMCSDSLOTNO) && CONFIG_NSH_MMCSDSLOTNO != SAMDL_MMCSDSLOTNO
+# error Only one MMC/SD slot: Slot 0 (CONFIG_NSH_MMCSDSLOTNO)
+# undef CONFIG_NSH_MMCSDSLOTNO
+# define CONFIG_NSH_MMCSDSLOTNO SAMDL_MMCSDSLOTNO
+# endif
+
+# if defined(CONFIG_NSH_MMCSDSPIPORTNO) && CONFIG_NSH_MMCSDSPIPORTNO != SPI_PORTNO
+# error CONFIG_NSH_MMCSDSPIPORTNO must have the same value as SPI_PORTNO
+# undef CONFIG_NSH_MMCSDSPIPORTNO
+# define CONFIG_NSH_MMCSDSPIPORTNO SPI_PORTNO
+# endif
+
+/* Default MMC/SD minor number */
+
+# ifndef CONFIG_NSH_MMCSDMINOR
+# define CONFIG_NSH_MMCSDMINOR 0
+# endif
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ * Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int board_app_initialize(void)
+{
+#if defined(SAMDL_HAVE_SPI0) && defined(CONFIG_SAMD21_XPLAINED_IOMODULE)
+ /* Initialize the SPI-based MMC/SD slot */
+
+ {
+ int ret = sam_sdinitialize(SPI_PORTNO, CONFIG_NSH_MMCSDMINOR);
+ if (ret < 0)
+ {
+ syslog(LOG_ERR, "ERROR: Failed to initialize MMC/SD slot: %d\n",
+ ret);
+ return ret;
+ }
+ }
+#endif
+
+ return OK;
+}
diff --git a/configs/samd21-xplained/src/sam_spi.c b/configs/samd21-xplained/src/sam_spi.c
new file mode 100644
index 0000000000..d76c15bb13
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_spi.c
@@ -0,0 +1,452 @@
+/****************************************************************************
+ * configs/samd21-xplained/src/sam_spi.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+#include
+#include
+
+#include
+
+#include "sam_config.h"
+#include "sam_port.h"
+#include "sam_spi.h"
+
+#include "samd21-xplained.h"
+
+#ifdef SAMDL_HAVE_SPI
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+#if defined(CONFIG_SAMD21_XPLAINED_IOMODULE) && \
+ defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE) && defined(CONFIG_SPI_OWNBUS)
+# error CONFIG_SPI_OWNBUS must not defined if using both I/O1 and OLED1 modules
+#endif
+
+/* Enables debug output from this file (needs CONFIG_DEBUG too) */
+
+#undef SPI_DEBUG /* Define to enable debug */
+#undef SPI_VERBOSE /* Define to enable verbose debug */
+
+#ifdef SPI_DEBUG
+# define spidbg lldbg
+# ifdef SPI_VERBOSE
+# define spivdbg lldbg
+# else
+# define spivdbg(x...)
+# endif
+#else
+# undef SPI_VERBOSE
+# define spidbg(x...)
+# define spivdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_spiinitialize
+ *
+ * Description:
+ * Called to configure SPI chip select PORT pins for the SAMD21 Xplained
+ * Pro board.
+ *
+ ****************************************************************************/
+
+void weak_function sam_spiinitialize(void)
+{
+ /* The I/O module containing the SD connector may or may not be installed. And, if
+ * it is installed, it may be in connector EXT1 or EXT2.
+ */
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE
+ /* TODO: enable interrupt on card detect */
+
+ sam_configport(PORT_SD_CD); /* Card detect input */
+ sam_configport(PORT_SD_CS); /* Chip select output */
+#endif
+
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE
+ sam_configport(PORT_OLED_DATA); /* Command/data */
+ sam_configport(PORT_OLED_CS); /* Card detect input */
+#endif
+}
+
+/****************************************************************************
+ * Name: sam_spi[n]select, sam_spi[n]status, and sam_spi[n]cmddata
+ *
+ * Description:
+ * These external functions must be provided by board-specific logic. They
+ * include:
+ *
+ * o sam_spi[n]select is a functions to manage the board-specific chip
+ * selects
+ * o sam_spi[n]status and sam_spi[n]cmddata: Implementations of the status
+ * and cmddata methods of the SPI interface defined by struct spi_ops_
+ * (see include/nuttx/spi/spi.h). All other methods including
+ * up_spiinitialize()) are provided by common SAMD/L logic.
+ *
+ * Where [n] is the SERCOM number for the SPI module.
+ *
+ * To use this common SPI logic on your board:
+ *
+ * 1. Provide logic in sam_boardinitialize() to configure SPI chip select
+ * pins.
+ * 2. Provide sam_spi[n]select() and sam_spi[n]status() functions in your
+ * board-specific logic. These functions will perform chip selection
+ * and status operations using GPIOs in the way your board is configured.
+ * 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
+ * sam_spi[n]cmddata() functions in your board-specific logic. This
+ * function will perform cmd/data selection operations using GPIOs in
+ * the way your board is configured.
+ * 3. Add a call to up_spiinitialize() in your low level application
+ * initialization logic
+ * 4. The handle returned by up_spiinitialize() may then be used to bind
+ * the SPI driver to higher level logic (e.g., calling
+ * mmcsd_spislotinitialize(), for example, will bind the SPI driver to
+ * the SPI MMC/SD driver).
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_spi[n]select
+ *
+ * Description:
+ * PIO chip select pins may be programmed by the board specific logic in
+ * one of two different ways. First, the pins may be programmed as SPI
+ * peripherals. In that case, the pins are completely controlled by the
+ * SPI driver. This method still needs to be provided, but it may be only
+ * a stub.
+ *
+ * An alternative way to program the PIO chip select pins is as a normal
+ * GPIO output. In that case, the automatic control of the CS pins is
+ * bypassed and this function must provide control of the chip select.
+ * NOTE: In this case, the GPIO output pin does *not* have to be the
+ * same as the NPCS pin normal associated with the chip select number.
+ *
+ * Input Parameters:
+ * dev - SPI device info
+ * devid - Identifies the (logical) device
+ * selected - TRUE:Select the device, FALSE:De-select the device
+ *
+ * Returned Values:
+ * None
+ *
+ ****************************************************************************/
+
+#ifdef SAMDL_HAVE_SPI0
+void sam_spi0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1
+ /* Select/de-select the SD card */
+
+ if (devid == SPIDEV_MMCSD)
+ {
+ /* Active low */
+
+ sam_portwrite(PORT_SD_CS, !selected);
+ }
+#endif
+
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1
+ /* Select/de-select the OLED */
+
+ if (devid == SPIDEV_DISPLAY)
+ {
+ /* Active low */
+
+ sam_portwrite(PORT_OLED_CS, !selected);
+ }
+#endif
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI1
+void sam_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2
+ /* Select/de-select the SD card */
+
+ if (devid == SPIDEV_MMCSD)
+ {
+ /* Active low */
+
+ sam_portwrite(PORT_SD_CS, !selected);
+ }
+#endif
+
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2
+ /* Select/de-select the OLED */
+
+ if (devid == SPIDEV_DISPLAY)
+ {
+ /* Active low */
+
+ sam_portwrite(PORT_OLED_CS, !selected);
+ }
+#endif
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI2
+void sam_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI3
+void sam_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI4
+void sam_spi4select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI5
+void sam_spi5select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+ bool selected)
+{
+}
+#endif
+
+/****************************************************************************
+ * Name: sam_spi[n]status
+ *
+ * Description:
+ * Return status information associated with the SPI device.
+ *
+ * Input Parameters:
+ * dev - SPI device info
+ * devid - Identifies the (logical) device
+ *
+ * Returned Values:
+ * Bit-encoded SPI status (see include/nuttx/spi/spi.h.
+ *
+ ****************************************************************************/
+
+#ifdef SAMDL_HAVE_SPI0
+uint8_t sam_spi0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ uint8_t ret = 0;
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1
+ /* Check if an SD card is present in the microSD slot */
+
+ if (devid == SPIDEV_MMCSD)
+ {
+ /* Active low */
+
+ if (!sam_portread(PORT_SD_CD))
+ {
+ ret |= SPI_STATUS_PRESENT;
+ }
+ }
+#endif
+
+ return ret;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI1
+uint8_t sam_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ uint8_t ret = 0;
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2
+ /* Check if an SD card is present in the microSD slot */
+
+ if (devid == SPIDEV_MMCSD)
+ {
+ /* Active low */
+
+ if (!sam_portread(PORT_SD_CD))
+ {
+ ret |= SPI_STATUS_PRESENT;
+ }
+ }
+#endif
+
+ return ret;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI2
+uint8_t sam_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ return 0;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI3
+uint8_t sam_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ return 0;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI4
+uint8_t sam_spi4status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ return 0;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI5
+uint8_t sam_spi5status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
+{
+ uint8_t ret = 0;
+ return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: sam_spi[n]cmddata
+ *
+ * Description:
+ * Some SPI devices require an additional control to determine if the SPI
+ * data being sent is a command or is data. If CONFIG_SPI_CMDDATA then
+ * this function will be called to different be command and data transfers.
+ *
+ * This is often needed, for example, by LCD drivers. Some LCD hardware
+ * may be configured to use 9-bit data transfers with the 9th bit
+ * indicating command or data. That same hardware may be configurable,
+ * instead, to use 8-bit data but to require an additional, board-
+ * specific GPIO control to distinguish command and data. This function
+ * would be needed in that latter case.
+ *
+ * Input Parameters:
+ * dev - SPI device info
+ * devid - Identifies the (logical) device
+ *
+ * Returned Values:
+ * Zero on success; a negated errno on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_SPI_CMDDATA
+#ifdef SAMDL_HAVE_SPI0
+int sam_spi0cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1
+ if (devid == SPIDEV_DISPLAY)
+ {
+ /* This is the Data/Command control pad which determines whether the
+ * data bits are data or a command.
+ *
+ * High: the inputs are treated as display data.
+ * Low: the inputs are transferred to the command registers.
+ */
+
+ (void)sam_portwrite(PORT_OLED_DATA, !cmd);
+ }
+#endif
+
+ return OK;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI1
+int sam_spi1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2
+ if (devid == SPIDEV_DISPLAY)
+ {
+ /* This is the Data/Command control pad which determines whether the
+ * data bits are data or a command.
+ *
+ * High: the inputs are treated as display data.
+ * Low: the inputs are transferred to the command registers.
+ */
+
+ (void)sam_portwrite(PORT_OLED_DATA, !cmd);
+ }
+#endif
+
+ return OK;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI2
+int sam_spi2cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+ return OK;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI3
+int sam_spi3cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+ return OK;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI4
+int sam_spi4cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+ return OK;
+}
+#endif
+
+#ifdef SAMDL_HAVE_SPI5
+int sam_spi5cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd)
+{
+ return OK;
+}
+#endif
+
+#endif /* CONFIG_SPI_CMDDATA */
+#endif /* SAMDL_HAVE_SPI */
diff --git a/configs/samd21-xplained/src/sam_ug2832hsweg04.c b/configs/samd21-xplained/src/sam_ug2832hsweg04.c
new file mode 100644
index 0000000000..9c0af2e444
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_ug2832hsweg04.c
@@ -0,0 +1,212 @@
+/****************************************************************************
+ * config/samd21-xplained/src/sam_ug2832hsweg04.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* OLED1 Connector:
+ *
+ * OLED1 CONNECTOR
+ * ----------------- ---------------------- ----------------------
+ * OLED1 EXT1 EXT2
+ * ----------------- ---------------------- ----------------------
+ * 1 ID 1 1
+ * ----------------- ---------------------- ----------------------
+ * 2 GND 2 GND 2 GND
+ * ----------------- ---------------------- ----------------------
+ * 3 BUTTON2 3 PB00 AIN[8] 3 PA10 AIN[18]
+ * ----------------- ---------------------- ----------------------
+ * 4 BUTTON3 4 PB01 AIN[9] 4 PA11 AIN[19]
+ * ----------------- ---------------------- ----------------------
+ * 5 DATA_CMD_SEL 5 PB06 PORT 5 PA20 PORT
+ * ----------------- ---------------------- ----------------------
+ * 6 LED3 6 PB07 PORT 6 PA21 PORT
+ * ----------------- ---------------------- ----------------------
+ * 7 LED1 7 PB02 TC6/WO[0] 7 PB12 TC4/WO[0]
+ * ----------------- ---------------------- ----------------------
+ * 8 LED2 8 PB03 TC6/WO[1] 8 PB13 TC4/WO[1]
+ * ----------------- ---------------------- ----------------------
+ * 9 BUTTON1 9 PB04 EXTINT[4] 9 PB14 EXTINT[14]
+ * ----------------- ---------------------- ----------------------
+ * 10 DISPLAY_RESET 10 PB05 PORT 10 PB15 PORT
+ * ----------------- ---------------------- ----------------------
+ * 11 N/C 11 PA08 SERCOM2 PAD[0] 11 PA08 SERCOM2 PAD[0]
+ * I²C SDA I²C SDA
+ * ----------------- ---------------------- ----------------------
+ * 12 N/C 12 PA09 SERCOM2 PAD[1] 12 PA09 SERCOM2 PAD[1]
+ * I²C SCL I²C SCL
+ * ----------------- ---------------------- ----------------------
+ * 13 N/C 13 PB09 SERCOM4 PAD[1] 13 PB11 SERCOM4 PAD[1]
+ * USART RX USART RX
+ * ----------------- ---------------------- ----------------------
+ * 14 N/C 14 PB08 SERCOM4 PAD[0] 14 PB10 SERCOM4 PAD[0]
+ * USART TX USART TX
+ * ----------------- ---------------------- ----------------------
+ * 15 DISPLAY_SS 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1]
+ * SPI SS SPI SS
+ * ----------------- ---------------------- ----------------------
+ * 16 SPI_MOSI 16 PA06 SERCOM0 PAD[2] 16 PA18 SERCOM1 PAD[2]
+ * SPI MOSI SPI MOSI
+ * ----------------- ---------------------- ----------------------
+ * 17 N/C 17 PA04 SERCOM0 PAD[0] 17 PA16 SERCOM1 PAD[0]
+ * SPI MISO SPI MISO
+ * ----------------- ---------------------- ----------------------
+ * 18 SPI_SCK 18 PA07 SERCOM0 PAD[3] 18 PA19 SERCOM1 PAD[3]
+ * SPI SCK SPI SCK
+ * ----------------- ---------------------- ----------------------
+ * 19 GND 19 GND GND
+ * ----------------- ---------------------- ----------------------
+ * 20 VCC 20 VCC VCC
+ * ----------------- ---------------------- ----------------------
+ *
+ * OLED1 signals
+ *
+ * DATA_CMD_SEL - Data/command select. Used to choose whether the
+ * communication is data to the display memory or a command to the LCD
+ * controller. High = data, low = command
+ * DISPLAY_RESET - Reset signal to the OLED display, active low. Used during
+ * initialization of the display.
+ * DISPLAY_SS - SPI slave select signal, must be held low during SPI
+ * communication.
+ * SPI_MOSI - SPI master out, slave in signal. Used to write data to the
+ * display
+ * SPI_SCK SPI - clock signal, generated by the master.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+
+#include
+#include
+#include
+#include
+
+#include "sam_port.h"
+#include "samd21-xplained.h"
+
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+/* The pin configurations here require that SPI1 is selected */
+
+#ifndef CONFIG_LCD_SSD1306
+# error "The OLED driver requires CONFIG_LCD_SSD1306 in the configuration"
+#endif
+
+#ifndef CONFIG_LCD_UG2832HSWEG04
+# error "The OLED driver requires CONFIG_LCD_UG2832HSWEG04 in the configuration"
+#endif
+
+#ifndef SAMDL_HAVE_SPI0
+# error "The OLED driver requires SAMDL_HAVE_SPI0 in the configuration"
+#endif
+
+#ifndef CONFIG_SPI_CMDDATA
+# error "The OLED driver requires CONFIG_SPI_CMDDATA in the configuration"
+#endif
+
+/* Debug ********************************************************************/
+
+#ifdef CONFIG_DEBUG_LCD
+# define lcddbg(format, ...) dbg(format, ##__VA_ARGS__)
+# define lcdvdbg(format, ...) vdbg(format, ##__VA_ARGS__)
+#else
+# define lcddbg(x...)
+# define lcdvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_graphics_setup
+ *
+ * Description:
+ * Called by NX initialization logic to configure the OLED.
+ *
+ ****************************************************************************/
+
+FAR struct lcd_dev_s *board_graphics_setup(unsigned int devno)
+{
+ FAR struct spi_dev_s *spi;
+ FAR struct lcd_dev_s *dev;
+
+ /* Configure the OLED PORTs. This initial configuration is RESET low,
+ * putting the OLED into reset state.
+ */
+
+ (void)sam_configport(PORT_OLED_RST);
+
+ /* Wait a bit then release the OLED from the reset state */
+
+ up_mdelay(20);
+ sam_portwrite(PORT_OLED_RST, true);
+
+ /* Get the SPI1 port interface */
+
+ spi = up_spiinitialize(OLED_CSNO);
+ if (!spi)
+ {
+ lcddbg("Failed to initialize SPI port 1\n");
+ }
+ else
+ {
+ /* Bind the SPI port to the OLED */
+
+ dev = ssd1306_initialize(spi, devno);
+ if (!dev)
+ {
+ lcddbg("Failed to bind SPI port 1 to OLED %d: %d\n", devno);
+ }
+ else
+ {
+ lcdvdbg("Bound SPI port 1 to OLED %d\n", devno);
+
+ /* And turn the OLED on */
+
+ (void)dev->setpower(dev, CONFIG_LCD_MAXPOWER);
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+#endif /* CONFIG_SAMD21_XPLAINED_OLED1MODULE */
diff --git a/configs/samd21-xplained/src/sam_userleds.c b/configs/samd21-xplained/src/sam_userleds.c
new file mode 100644
index 0000000000..c8276ea901
--- /dev/null
+++ b/configs/samd21-xplained/src/sam_userleds.c
@@ -0,0 +1,142 @@
+/****************************************************************************
+ * configs/samd21-xplained/src/sam_userleds.c
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+/* There are three LEDs on board the SAMD21 Xplained Pro board: The EDBG
+ * controls two of the LEDs, a power LED and a status LED. There is only
+ * one user controllable LED, a yellow LED labelled STATUS near the SAMD21 USB
+ * connector.
+ *
+ * This LED is controlled by PB30 and the LED can be activated by driving PB30
+ * to GND.
+ *
+ * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ * control the LED. Otherwise, the LED can be controlled from user applications
+ * using the logic in this file.
+ */
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include
+
+#include
+#include
+#include
+
+#include
+
+#include "sam_port.h"
+#include "samd21-xplained.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG
+ * with CONFIG_DEBUG_VERBOSE too)
+ */
+
+#ifdef CONFIG_DEBUG_LEDS
+# define leddbg lldbg
+# define ledvdbg llvdbg
+#else
+# define leddbg(x...)
+# define ledvdbg(x...)
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam_ledinit
+ *
+ * Description:
+ * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ * LEDs. If CONFIG_ARCH_LEDS is not defined, then the sam_ledinit() is
+ * available to initialize the LED from user application logic.
+ *
+ ****************************************************************************/
+
+void sam_ledinit(void)
+{
+ (void)sam_configport(PORT_STATUS_LED);
+}
+
+/****************************************************************************
+ * Name: sam_setled
+ *
+ * Description:
+ * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ * LEDs. If CONFIG_ARCH_LEDS is not defined, then the sam_setled() is
+ * available to control the LED from user application logic.
+ *
+ *****************************************************************************/
+
+void sam_setled(int led, bool ledon)
+{
+ if (led == BOARD_STATUS_LED)
+ {
+ sam_portwrite(PORT_STATUS_LED, !ledon);
+ }
+}
+
+/****************************************************************************
+ * Name: sam_setled
+ *
+ * Description:
+ * If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
+ * LEDs. If CONFIG_ARCH_LEDS is not defined, then the sam_setleds() is
+ * available to control the LED from user application logic. NOTE: since
+ * there is only a single LED on-board, this is function is not very useful.
+ *
+ *****************************************************************************/
+
+void sam_setleds(uint8_t ledset)
+{
+ sam_setled(BOARD_STATUS_LED, (ledset & BOARD_STATUS_LED_BIT) != 0);
+}
+
+#endif /* !CONFIG_ARCH_LEDS */
diff --git a/configs/samd21-xplained/src/samd21-xplained.h b/configs/samd21-xplained/src/samd21-xplained.h
new file mode 100644
index 0000000000..d0c7b328ff
--- /dev/null
+++ b/configs/samd21-xplained/src/samd21-xplained.h
@@ -0,0 +1,264 @@
+/************************************************************************************
+ * configs/samd21-xplained/src/samd21-xplained.h
+ *
+ * Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************/
+
+#ifndef __CONFIGS_SAMD21_XPLAINED_SRC_SAMD21_XPLAINED_H
+#define __CONFIGS_SAMD21_XPLAINED_SRC_SAMD21_XPLAINED_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include
+#include
+
+#include
+
+#include
+#include
+
+#include "sam_config.h"
+#include "sam_pinmap.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* LEDs: There are three LEDs on board the SAMD21 Xplained Pro board: The EDBG
+ * controls two of the LEDs, a power LED and a status LED. There is only
+ * one user controllable LED, a yellow LED labelled STATIS near the SAMD21 USB
+ * connector.
+ *
+ * This LED is controlled by PB30 and the LED can be activated by driving PB30
+ * to GND.
+ *
+ * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
+ * control the LED as follows:
+ *
+ * SYMBOL Meaning LED
+ * ------------------- ----------------------- ------
+ * LED_STARTED NuttX has been started OFF
+ * LED_HEAPALLOCATE Heap has been allocated OFF
+ * LED_IRQSENABLED Interrupts enabled OFF
+ * LED_STACKCREATED Idle stack created ON
+ * LED_INIRQ In an interrupt N/C
+ * LED_SIGNAL In a signal handler N/C
+ * LED_ASSERTION An assertion failed N/C
+ * LED_PANIC The system has crashed FLASH
+ *
+ * Thus if the LED is statically on, NuttX has successfully booted and is,
+ * apparently, running normally. If the LED is flashing at approximately
+ * 2Hz, then a fatal error has been detected and the system has halted.
+ */
+
+#define PORT_STATUS_LED (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTB | PORT_PIN30)
+
+/* Mechanical buttons:
+ *
+ * The SAMD21 Xplained Pro contains two mechanical buttons. One button is the
+ * RESET button connected to the SAMD21 reset line and the other is a generic user
+ * configurable button. When a button is pressed it will drive the I/O line to GND.
+ *
+ * PA15 SW0
+ */
+
+#define PORT_SW0 (PORT_INTERRUPT | PORT_PULL_UP | PORTA | PORT_PIN15)
+#define IRQ_SW0 SAM_IRQ_PA15
+
+/* I/O1
+ *
+ * Support for the microSD card slot on the I/O1 module. The I/O1 requires
+ * SPI support and two PORTs. These the PORTs will vary if the I/O1
+ * is installed on the EXT1 or EXT2 connector:
+ *
+ * --- ------------------ ---------------------- -------------------------------
+ * PIN EXT1 EXT2 Description
+ * --- ------------------ ---------------------- -------------------------------
+ * 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1] Active low chip select OUTPUT,
+ * SPI SS SPI SS pulled high on board.
+ * --- ------------------ ---------------------- -------------------------------
+ * 10 PB05 PORT 10 PB15 PORT Active low card detect INPUT,
+ * must use internal pull-up.
+ * --- ------------------ ---------------------- -------------------------------
+ */
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE
+
+# ifndef SAMDL_HAVE_SPI0
+# error SAMDL_HAVE_SPI0 is required to use the I/O1 module
+# endif
+
+# if defined(CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1)
+
+# if defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE) && \
+ defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1)
+# error I/O1 and OLED1 modules cannot both reside in EXT1
+# endif
+
+# define PORT_SD_CD (PORT_INTERRUPT | PORT_INT_CHANGE | PORT_PULL_UP | \
+ PORTB | PORT_PIN5)
+
+# define PORT_SD_CS (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTA | PORT_PIN5)
+
+# elif defined(CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2)
+
+# if defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE) && \
+ defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2)
+# error I/O1 and OLED1 modules cannot both reside in EXT2
+# endif
+
+# define PORT_SD_CD (PORT_INTERRUPT | PORT_INT_CHANGE | PORT_PULL_UP | \
+ PORTB | PORT_PIN15)
+
+# define PORT_SD_CS (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTA | PORT_PIN17)
+
+# else
+# error Which connector is the I/O1 module installed in?
+# endif
+#endif
+
+/* OLED1
+ *
+ * Support for the microSD card slot on the I/O1 module. The I/O1 requires
+ * SPI support and three output PORTs. These the PORTs will vary if the OLED1
+ * is installed on the EXT1 or EXT2 connector:
+ *
+ *
+ * PIN EXT1 EXT2 Description
+ * --- ------------------- -------------------- -------------------------------------
+ * 5 PB06 PORT PA20 PORT DATA_CMD_SEL
+ * 10 PB05 PORT PB15 PORT DISPLAY_RESET. Active low.
+ * 15 PA05 SERCOM0 PAD[1] PA17 SERCOM1 PAD[1] DISPLAY_SS. Active low.
+ * SPI SS SPI SS
+ */
+
+#ifdef CONFIG_SAMD21_XPLAINED_OLED1MODULE
+
+# ifndef SAMDL_HAVE_SPI0
+# error SAMDL_HAVE_SPI0 is required to use the OLED1 module
+# endif
+
+# ifndef CONFIG_SPI_CMDDATA
+# error CONFIG_SPI_CMDDATA is required to use the OLED1 module
+# endif
+
+# ifndef CONFIG_LCD_SSD1306
+# error CONFIG_LCD_SSD1306 is required to use the OLED1 module
+# endif
+
+# ifndef CONFIG_LCD_UG2832HSWEG04
+# error CONFIG_LCD_UG2832HSWEG04 is required to use the OLED1 module
+# endif
+
+# if defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1)
+
+# if defined(CONFIG_SAMD21_XPLAINED_IOMODULE) && \
+ defined(CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1)
+# error OLED1 and I/O1 modules cannot both reside in EXT1
+# endif
+
+# define PORT_OLED_DATA (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_CLEAR | \
+ PORTB | PORT_PIN6)
+# define PORT_OLED_RST (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_CLEAR | \
+ PORTB | PORT_PIN5)
+# define PORT_OLED_CS (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTA | PORT_PIN5)
+
+# elif defined(CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2)
+
+# if defined(CONFIG_SAMD21_XPLAINED_IOMODULE) && \
+ defined(CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2)
+# error OLED1 and I/O1 modules cannot both reside in EXT2
+# endif
+
+# define PORT_OLED_DATA (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_CLEAR | \
+ PORTA | PORT_PIN20)
+# define PORT_OLED_RST (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_CLEAR | \
+ PORTB | PORT_PIN15)
+# define PORT_OLED_CS (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTA | PORT_PIN17)
+
+# else
+# error Which connector is the OLED1 module installed in?
+# endif
+#endif
+
+#if defined(CONFIG_LCD_UG2864AMBAG01) || defined(CONFIG_LCD_UG2864HSWEG01)
+# define PORT_SD_CS (PORT_OUTPUT | PORT_PULL_NONE | PORT_OUTPUT_SET | \
+ PORTB | PORT_PIN11) /* REVISIT */
+#endif
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+/************************************************************************************
+ * Public data
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: sam_spiinitialize
+ *
+ * Description:
+ * Called to configure SPI chip select PORT pins for the SAM3U-EK board.
+ *
+ ************************************************************************************/
+
+void weak_function sam_spiinitialize(void);
+
+/************************************************************************************
+ * Name: sam_sdinitialize
+ *
+ * Description:
+ * Initialize the SPI-based SD card. Requires CONFIG_SAMD21_XPLAINED_IOMODULE=y,
+ * CONFIG_DISABLE_MOUNTPOINT=n, CONFIG_MMCSD=y, and the appropriate SERCOM SPI
+ * port enabled.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_SAMD21_XPLAINED_IOMODULE
+int sam_sdinitialize(int port, int minor);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_SAMD21_XPLAINED_SRC_SAMD21_XPLAINED_H */
+
diff --git a/configs/saml21-xplained/README.txt b/configs/saml21-xplained/README.txt
index 16d11c40a9..3b36a758e3 100644
--- a/configs/saml21-xplained/README.txt
+++ b/configs/saml21-xplained/README.txt
@@ -46,6 +46,7 @@ Modules
2) OLED1 - An OLED plus 3 additional switches and 3 additional LEDs
3) PROTO1 - A prototyping board with logic on board (other than power-
related logic).
+ 4) And others. See http://www.atmel.com/products/microcontrollers/avr/xplained.aspx
Some of these are discussed further below.
@@ -590,28 +591,30 @@ SAML21 Xplained Pro-specific Configuration Options
Individual subsystems can be enabled:
- CONFIG_SAMDL_WDT - Watchdog Timer"
- CONFIG_SAMDL_RTC - Real Time Counter"
- CONFIG_SAMDL_NVMCTRL - Non-Volatile Memory Controller"
- CONFIG_SAMDL_EVSYS - Event System"
- CONFIG_SAMDL_SERCOM0 - Serial Communication Interface 0"
- CONFIG_SAMDL_SERCOM1 - Serial Communication Interface 1"
- CONFIG_SAMDL_SERCOM2 - Serial Communication Interface 2"
- CONFIG_SAMDL_SERCOM3 - Serial Communication Interface 3"
- CONFIG_SAMDL_SERCOM4 - Serial Communication Interface 4"
- CONFIG_SAMDL_SERCOM5 - Serial Communication Interface 5"
- CONFIG_SAMDL_TC0 - Timer/Counter 0"
- CONFIG_SAMDL_TC1 - Timer/Counter 1"
- CONFIG_SAMDL_TC2 - Timer/Counter 2"
- CONFIG_SAMDL_TC3 - Timer/Counter 3"
- CONFIG_SAMDL_TC4 - Timer/Counter 4"
- CONFIG_SAMDL_TC5 - Timer/Counter 5"
- CONFIG_SAMDL_TC6 - Timer/Counter 6"
- CONFIG_SAMDL_TC7 - Timer/Counter 6"
- CONFIG_SAMDL_ADC - Analog-to-Digital Converter"
- CONFIG_SAMDL_AC - Analog Comparator"
- CONFIG_SAMDL_DAC - Digital-to-Analog Converter"
- CONFIG_SAMDL_PTC - Peripheral Touch Controller"
+ CONFIG_SAMDL_AC - Analog Comparator
+ CONFIG_SAMDL_ADC - Analog-to-Digital Converter
+ CONFIG_SAMDL_DAC - Digital-to-Analog Converter
+ CONFIG_SAMDL_DMAC - Analog Comparator
+ CONFIG_SAMDL_EVSYS - Event System
+ CONFIG_SAMDL_NVMCTRL - Non-Volatile Memory Controller
+ CONFIG_SAMDL_PTC - Peripheral Touch Controller
+ CONFIG_SAMDL_RTC - Real Time Counter
+ CONFIG_SAMDL_SERCOM0 - Serial Communication Interface 0
+ CONFIG_SAMDL_SERCOM1 - Serial Communication Interface 1
+ CONFIG_SAMDL_SERCOM2 - Serial Communication Interface 2
+ CONFIG_SAMDL_SERCOM3 - Serial Communication Interface 3
+ CONFIG_SAMDL_SERCOM4 - Serial Communication Interface 4
+ CONFIG_SAMDL_SERCOM5 - Serial Communication Interface 5
+ CONFIG_SAMDL_TCC0 - Timer/Counter 0 for Control
+ CONFIG_SAMDL_TCC1 - Timer/Counter 1 for Control
+ CONFIG_SAMDL_TCC2 - Timer/Counter 2 for Control
+ CONFIG_SAMDL_TC3 - Timer/Counter 3
+ CONFIG_SAMDL_TC4 - Timer/Counter 4
+ CONFIG_SAMDL_TC5 - Timer/Counter 5
+ CONFIG_SAMDL_TC6 - Timer/Counter 6
+ CONFIG_SAMDL_TC7 - Timer/Counter 6
+ CONFIG_SAMDL_USB - USB device or host
+ CONFIG_SAMDL_WDT - Watchdog Timer
Some subsystems can be configured to operate in different ways. The drivers
need to know how to configure the subsystem.