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boards/arm/samd2l2/arduino-m0: Add initial board support for the Arduino M0.

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This commit is contained in:
Alan Carvalho de Assis 2019-09-22 10:43:36 -06:00 committed by Gregory Nutt
parent 8eafe880dc
commit 35227fb873
18 changed files with 1949 additions and 1 deletions
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2
Documentation/README.html
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@ -216,6 +216,8 @@ nuttx/
| | | `- sama5d4-ek/ | | | `- sama5d4-ek/
| | | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/boards/arm/sama5/sama5d4-ek/README.txt" target="_blank"><b><i>README.txt</i></b></a> | | | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/boards/arm/sama5/sama5d4-ek/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| | |- samd2l2/ | | |- samd2l2/
| | | |- arduino-m0/
| | | | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/boards/arm/samd2l2/arduino-m0/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| | | |- samd20-xplained/ | | | |- samd20-xplained/
| | | | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/boards/arm/samd2l2/samd20-xplained/README.txt" target="_blank"><b><i>README.txt</i></b></a> | | | | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/boards/arm/samd2l2/samd20-xplained/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| | | |- samd21-xplained/ | | | |- samd21-xplained/

2
README.txt
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@ -1921,6 +1921,8 @@ nuttx/
| | | `- sama5d4-ek/ | | | `- sama5d4-ek/
| | | `- README.txt | | | `- README.txt
| | |- samd2l2/ | | |- samd2l2/
| | | |- arduino-m0/
| | | | `- README.txt
| | | |- samd20-xplained/ | | | |- samd20-xplained/
| | | | `- README.txt | | | | `- README.txt
| | | |- samd21-xplained/ | | | |- samd21-xplained/

12
boards/Kconfig
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@ -35,6 +35,14 @@ config ARCH_BOARD_ARDUINO_DUE
This options selects the Arduino DUE board featuring the Atmel This options selects the Arduino DUE board featuring the Atmel
ATSAM3X8E MCU running at 84 MHz. ATSAM3X8E MCU running at 84 MHz.
config ARCH_BOARD_ARDUINO_M0
bool "Arduino M0"
depends on ARCH_CHIP_SAMD21G18A
select ARCH_HAVE_LEDS
---help---
This options selects the Arduino M0 board featuring the Atmel
ATSAMD21 MCU.
config ARCH_BOARD_AVR32DEV1 config ARCH_BOARD_AVR32DEV1
bool "Atmel AVR32DEV1 board" bool "Atmel AVR32DEV1 board"
depends on ARCH_CHIP_AT32UC3B0256 depends on ARCH_CHIP_AT32UC3B0256
@ -1906,6 +1914,7 @@ config ARCH_BOARD
default "amber" if ARCH_BOARD_AMBER default "amber" if ARCH_BOARD_AMBER
default "arduino-mega2560" if ARCH_BOARD_ARDUINO_MEGA2560 default "arduino-mega2560" if ARCH_BOARD_ARDUINO_MEGA2560
default "arduino-due" if ARCH_BOARD_ARDUINO_DUE default "arduino-due" if ARCH_BOARD_ARDUINO_DUE
default "arduino-m0" if ARCH_BOARD_ARDUINO_M0
default "avr32dev1" if ARCH_BOARD_AVR32DEV1 default "avr32dev1" if ARCH_BOARD_AVR32DEV1
default "axoloti" if ARCH_BOARD_AXOLOTI default "axoloti" if ARCH_BOARD_AXOLOTI
default "bambino-200e" if ARCH_BOARD_BAMBINO_200E default "bambino-200e" if ARCH_BOARD_BAMBINO_200E
@ -2281,6 +2290,9 @@ endif
if ARCH_BOARD_ARDUINO_DUE if ARCH_BOARD_ARDUINO_DUE
source "boards/arm/sam34/arduino-due/Kconfig" source "boards/arm/sam34/arduino-due/Kconfig"
endif endif
if ARCH_BOARD_ARDUINO_M0
source "boards/arm/samd2l2/arduino-m0/Kconfig"
endif
if ARCH_BOARD_FLIPNCLICK_SAM3X if ARCH_BOARD_FLIPNCLICK_SAM3X
source "boards/arm/sam34/flipnclick-sam3x/Kconfig" source "boards/arm/sam34/flipnclick-sam3x/Kconfig"
endif endif

8
boards/arm/samd2l2/arduino-m0/Kconfig Normal file
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@ -0,0 +1,8 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
if ARCH_BOARD_ARDUINO_M0
endif

143
boards/arm/samd2l2/arduino-m0/README.txt Normal file
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@ -0,0 +1,143 @@
README
======
This README discusses issues unique to NuttX configurations for the
Arduino M0. I used a compatible board called Wemos SAMD21 M0 board,
but there are other equivalent boards, like the RobotDyn SAMD21 M0.
Unfortunately because the Arduino.cc vs Arduino.org conflict in the past,
we have three types of boards: Arduino Zero, Arduino M0 and Arduino M0 Pro.
The Wemos SAMD21 M0 is compatible with Arduino M0, but not exactly a clone.
You have two options to program it: using the SWD (EDBG) connector that
comes in the board or the Arduino M0 bootloader that comes flashed on it.
Currently only SWD programming is supported. Bootloader skip area should be
implemented to avoid overwriting the bootloader area.
The board uses the ATSAMD21G18A MCU and can work over the Native USB Port.
Contents
========
- STATUS/ISSUES
- LEDs
- Serial Consoles
- Configurations
STATUS/ISSUES
=============
Because the Arduino M0 doesn't have a 12MHz crystal, it uses the internal
RC oscillator.
LEDs
====
There is one yellow LED available on the Arduino M0 and it can be turned
on and off. The LED can be activated by driving the connected
PA17 I/O line to high level.
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
===============
SERCOM5
------
SERCOM5 is available on pins PB22 (TXD) and PB23 (RXD). You will need to
solder a two pins header to RXD and TXD labels, near to ICSP pin header.
PIN GPIO Function
---- ---- ------------------
37 PB22 SERCOM5 / USART RX
38 PB23 SERCOM5 / USART TX
If you have a 3.3V USB/Serial adapter 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.
Native USB Port
---------------
You can access the NSH shell directly using the USB connector. All you need
to do is use the "usbnsh" board profile.
Configurations
==============
Each Arduino M0 configuration is maintained in a sub-directory and
can be selected as follow:
tools/configure.sh arduino-m0:<subdir>
Before building, make sure the PATH environment variable include 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 <subdir> 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
see additional README.txt files in the NuttX tools repository.
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
see additional README.txt files in the NuttX tools repository.
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
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 SERCOM5
at 115200 8N1 via RXD/TXD pads:
PIN EXT3 GPIO Function
---- ---- ------------------
37 PB22 SERCOM5 / USART RX
38 PB23 SERCOM5 / USART TX

71
boards/arm/samd2l2/arduino-m0/configs/nsh/defconfig Normal file
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@ -0,0 +1,71 @@
#
# This file is autogenerated: PLEASE DO NOT EDIT IT.
#
# You can use "make menuconfig" to make any modifications to the installed .config file.
# You can then do "make savedefconfig" to generate a new defconfig file that includes your
# modifications.
#
# CONFIG_DISABLE_POSIX_TIMERS is not set
# CONFIG_NSH_DISABLEBG is not set
# CONFIG_NSH_DISABLESCRIPT is not set
# CONFIG_NSH_DISABLE_CMP is not set
# CONFIG_NSH_DISABLE_DD is not set
# CONFIG_NSH_DISABLE_EXEC is not set
# CONFIG_NSH_DISABLE_EXIT is not set
# CONFIG_NSH_DISABLE_GET is not set
# CONFIG_NSH_DISABLE_HEXDUMP is not set
# CONFIG_NSH_DISABLE_IFCONFIG is not set
# CONFIG_NSH_DISABLE_ITEF is not set
# CONFIG_NSH_DISABLE_LOOPS is not set
# CONFIG_NSH_DISABLE_LOSETUP is not set
# CONFIG_NSH_DISABLE_MKRD is not set
# CONFIG_NSH_DISABLE_PS is not set
# CONFIG_NSH_DISABLE_PUT is not set
# CONFIG_NSH_DISABLE_SEMICOLON is not set
# CONFIG_NSH_DISABLE_WGET is not set
# CONFIG_NSH_DISABLE_XD is not set
CONFIG_ARCH="arm"
CONFIG_ARCH_BOARD="arduino-m0"
CONFIG_ARCH_BOARD_ARDUINO_M0=y
CONFIG_ARCH_CHIP="samd2l2"
CONFIG_ARCH_CHIP_SAMD21G18A=y
CONFIG_ARCH_CHIP_SAMD2X=y
CONFIG_ARCH_STACKDUMP=y
CONFIG_BOARD_LOOPSPERMSEC=3410
CONFIG_BUILTIN=y
CONFIG_DEFAULT_SMALL=y
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_MAX_TASKS=16
CONFIG_MAX_WDOGPARMS=2
CONFIG_NFILE_DESCRIPTORS=8
CONFIG_NFILE_STREAMS=8
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_PREALLOC_MQ_MSGS=4
CONFIG_PREALLOC_TIMERS=4
CONFIG_PREALLOC_WDOGS=4
CONFIG_PTHREAD_STACK_DEFAULT=1536
CONFIG_RAM_SIZE=32768
CONFIG_RAM_START=0x20000000
CONFIG_RAW_BINARY=y
CONFIG_RR_INTERVAL=200
CONFIG_SAMD2L2_SERCOM3=y
CONFIG_SAMD2L2_SERCOM4=y
CONFIG_SAMD2L2_SERCOM5=y
CONFIG_SCHED_WAITPID=y
CONFIG_SDCLONE_DISABLE=y
CONFIG_START_DAY=21
CONFIG_START_MONTH=6
CONFIG_START_YEAR=2015
CONFIG_SYSTEM_NSH=y
CONFIG_SYSTEM_NSH_CXXINITIALIZE=y
CONFIG_TASK_NAME_SIZE=0
CONFIG_TASK_SPAWN_DEFAULT_STACKSIZE=1536
CONFIG_USART3_RXBUFSIZE=64
CONFIG_USART3_TXBUFSIZE=64
CONFIG_USART4_RXBUFSIZE=64
CONFIG_USART4_TXBUFSIZE=64
CONFIG_USART5_SERIAL_CONSOLE=y
CONFIG_USERMAIN_STACKSIZE=1536
CONFIG_USER_ENTRYPOINT="nsh_main"
CONFIG_WDOG_INTRESERVE=0

532
boards/arm/samd2l2/arduino-m0/include/board.h Normal file
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@ -0,0 +1,532 @@
/****************************************************************************
* boards/arm/samd2l2/arduino-m0/include/board.h
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 __BOARDS_ARM_SAMD2L2_ARDUINO_M0_INCLUDE_BOARD_H
#define __BOARDS_ARM_SAMD2L2_ARDUINO_M0_INCLUDE_BOARD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#ifndef __ASSEMBLY__
# include <stdint.h>
# ifdef CONFIG_SAMD2L2_GPIOIRQ
# include <arch/irq.h>
# 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 Arduino M0 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)
*
* 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
#define BOARD_DFLL_OPENLOOP 1
#undef BOARD_DFLL_ONDEMAND
#undef BOARD_DFLL_RUNINSTANDBY
/* 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 Arduino M0 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_1)
#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_ARDUINO_M0_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_ARDUINO_M0_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_ARDUINO_M0_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 USART used to Serial Console
*
* PIN PORT SERCOM FUNCTION
* --- ------------------ -----------
* 31 PB02 SERCOM5 PAD0 USART TXD
* 32 PB03 SERCOM5 PAD1 USART RXD
*/
#define BOARD_SERCOM5_GCLKGEN 0
#define BOARD_SERCOM5_SLOW_GCLKGEN BOARD_SERCOM05_SLOW_GCLKGEN
#define BOARD_SERCOM5_MUXCONFIG (USART_CTRLA_RXPAD3 | USART_CTRLA_TXPAD2)
#define BOARD_SERCOM5_PINMAP_PAD0 0
#define BOARD_SERCOM5_PINMAP_PAD1 0
#define BOARD_SERCOM5_PINMAP_PAD2 PORT_SERCOM5_PAD2_4 /* USART 5 TXD */
#define BOARD_SERCOM5_PINMAP_PAD3 PORT_SERCOM5_PAD3_4 /* USART 5 RXD */
#define BOARD_SERCOM5_FREQUENCY BOARD_GCLK0_FREQUENCY
/* USB definitions **********************************************************/
/* This is the source clock generator for the GCLK_USB clock
*/
#define BOARD_USB_GCLKGEN 0
#define BOARD_USB_FREQUENCY BOARD_GCLK0_FREQUENCY
/* default USB Pad calibration (not used yet by USB driver) */
#define BOARD_USB_PADCAL_P 29
#define BOARD_USB_PADCAL_N 5
#define BOARD_USB_PADCAL_TRIM 3
/* LED definitions **********************************************************/
/* There are three LEDs on board the Arduino M0 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 board_userled() */
#define BOARD_STATUS_LED 0
#define BOARD_NLEDS 1
/* LED bits for use with board_userled_all() */
#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 Arduino M0 doesn't contain mechanical buttons.
*/
#define NUM_BUTTONS 0
#endif /* __BOARDS_ARM_SAMD2L2_ARDUINO_M0_INCLUDE_BOARD_H */

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############################################################################
# boards/arm/samd2l2/arduino-m0/scripts/Make.defs
#
# Copyright (C) 2019 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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 $(TOPDIR)/boards/$(CONFIG_ARCH)/$(CONFIG_ARCH_CHIP)/$(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)/boards/$(CONFIG_ARCH)/$(CONFIG_ARCH_CHIP)/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
endif
CC = $(CROSSDEV)gcc
CXX = $(CROSSDEV)g++
CPP = $(CROSSDEV)gcc -E
LD = $(CROSSDEV)ld
STRIP = $(CROSSDEV)strip --strip-unneeded
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 -fcheck-new -fno-rtti
ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
ARCHWARNINGSXX = -Wall -Wshadow -Wundef
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
ASMEXT = .S
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 -Wundef -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/mkwindeps.sh
else
# Linux/Cygwin-native host tools
MKDEP = $(TOPDIR)/tools/mkdeps$(HOSTEXEEXT)
endif

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/scripts/flash.ld
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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
.ARM.exidx : {
__exidx_start = ABSOLUTE(.);
*(.ARM.exidx*)
__exidx_end = ABSOLUTE(.);
} >flash
.data : {
_sdata = ABSOLUTE(.);
*(.data .data.*)
*(.gnu.linkonce.d.*)
CONSTRUCTORS
. = ALIGN(4);
_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)
. = ALIGN(4);
_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) }
}

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/.depend
/Make.dep

59
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############################################################################
# boards/arm/samd2l2/arduino-m0/src/Makefile
#
# Copyright (C) 2019 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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 $(TOPDIR)/Make.defs
ASRCS =
CSRCS = sam_boot.c
ifeq ($(CONFIG_SAMD2L2_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_LIB_BOARDCTL),y)
CSRCS += sam_appinit.c
endif
include $(TOPDIR)/boards/Board.mk

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/arduino_m0.h
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 __BOARDS_ARM_SAMD2L2_ARDUINO_M0_SRC_ARDUINO_M0_H
#define __BOARDS_ARM_SAMD2L2_ARDUINO_M0_SRC_ARDUINO_M0_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
#include <arch/irq.h>
#include <nuttx/irq.h>
#include "sam_config.h"
#include "sam_pinmap.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* LEDs:
* There is a LED on board the Arduino M0 board.
*
* This LED is controlled by PA17 and the LED can be activated by driving
* PA17 to High.
*
* 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 | \
PORTA | PORT_PIN17)
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public data
****************************************************************************/
#ifndef __ASSEMBLY__
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_spidev_initialize
*
* Description:
* Called to configure SPI chip select PORT pins for the SAM3U-EK board.
*
****************************************************************************/
void weak_function sam_spidev_initialize(void);
#endif /* __ASSEMBLY__ */
#endif /* __BOARDS_ARM_SAMD2L2_ARDUINO_M0_SRC_ARDUINO_M0_H */

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/sam_appinit.c
*
* Copyright (C) 2015-2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <stdio.h>
#include <syslog.h>
#include <nuttx/board.h>
#include "sam_config.h"
#include "arduino_m0.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_app_initialize
*
* Description:
* Perform application specific initialization. This function is never
* called directly from application code, but only indirectly via the
* (non-standard) boardctl() interface using the command BOARDIOC_INIT.
*
* Input Parameters:
* arg - The boardctl() argument is passed to the board_app_initialize()
* implementation without modification. The argument has no
* meaning to NuttX; the meaning of the argument is a contract
* between the board-specific initialization logic and the
* matching application logic. The value cold be such things as a
* mode enumeration value, a set of DIP switch switch settings, a
* pointer to configuration data read from a file or serial FLASH,
* or whatever you would like to do with it. Every implementation
* should accept zero/NULL as a default configuration.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned on
* any failure to indicate the nature of the failure.
*
****************************************************************************/
int board_app_initialize(uintptr_t arg)
{
return OK;
}

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/sam_autoleds.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 is a LED on board the Arduino M0 board.
*
* 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 <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <debug.h>
#include <nuttx/board.h>
#include <arch/board/board.h>
#include "sam_port.h"
#include "arduino_m0.h"
#ifdef CONFIG_ARCH_LEDS
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_autoled_initialize
****************************************************************************/
void board_autoled_initialize(void)
{
(void)sam_configport(PORT_STATUS_LED);
}
/****************************************************************************
* Name: board_autoled_on
****************************************************************************/
void board_autoled_on(int led)
{
bool ledstate = false;
switch (led)
{
case 0: /* LED_STARTED: NuttX has been started STATUS LED=ON
* LED_HEAPALLOCATE: Heap has been allocated STATUS LED=ON
* LED_IRQSENABLED: Interrupts enabled STATUS LED=ON
*/
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 = true; /* Set ledstate == false to turn OFF */
break;
}
sam_portwrite(PORT_STATUS_LED, ledstate);
}
/****************************************************************************
* Name: board_autoled_off
****************************************************************************/
void board_autoled_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, false);
break;
}
}
#endif /* CONFIG_ARCH_LEDS */

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/sam_boot.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <debug.h>
#include <nuttx/board.h>
#include "sam_config.h"
#include "arduino_m0.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_boardinitialize
*
* Description:
* All SAMD21 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_spidev_initialize() has been brought into the link.
*/
#ifdef SAMD2L2_HAVE_SPI
if (sam_spidev_initialize)
{
sam_spidev_initialize();
}
#endif
/* Configure on-board LEDs if LED support has been selected. */
#ifdef CONFIG_ARCH_LEDS
board_autoled_initialize();
#endif
}

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/sam_spi.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <stdbool.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/spi/spi.h>
#include "sam_config.h"
#include "sam_port.h"
#include "sam_spi.h"
#include "arduino_m0.h"
#ifdef SAMD2L2_HAVE_SPI
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_spidev_initialize
*
* Description:
* Called to configure SPI chip select PORT pins for the SAMD21 Xplained
* Pro board.
*
****************************************************************************/
void weak_function sam_spidev_initialize(void)
{
}
/****************************************************************************
* 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
* sam_spibus_initialize()) 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 sam_spibus_initialize() in your low level application
* initialization logic
* 4. The handle returned by sam_spibus_initialize() 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 Value:
* None
*
****************************************************************************/
#ifdef SAMD2L2_HAVE_SPI0
void sam_spi0select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
}
#endif
#ifdef SAMD2L2_HAVE_SPI1
void sam_spi1select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
}
#endif
#ifdef SAMD2L2_HAVE_SPI2
void sam_spi2select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
}
#endif
#ifdef SAMD2L2_HAVE_SPI3
void sam_spi3select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
}
#endif
#ifdef SAMD2L2_HAVE_SPI4
void sam_spi4select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
}
#endif
#ifdef SAMD2L2_HAVE_SPI5
void sam_spi5select(FAR struct spi_dev_s *dev, uint32_t 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 Value:
* Bit-encoded SPI status (see include/nuttx/spi/spi.h.
*
****************************************************************************/
#ifdef SAMD2L2_HAVE_SPI0
uint8_t sam_spi0status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef SAMD2L2_HAVE_SPI1
uint8_t sam_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef SAMD2L2_HAVE_SPI2
uint8_t sam_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef SAMD2L2_HAVE_SPI3
uint8_t sam_spi3status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef SAMD2L2_HAVE_SPI4
uint8_t sam_spi4status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef SAMD2L2_HAVE_SPI5
uint8_t sam_spi5status(FAR struct spi_dev_s *dev, uint32_t 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 Value:
* Zero on success; a negated errno on failure.
*
****************************************************************************/
#ifdef CONFIG_SPI_CMDDATA
#ifdef SAMD2L2_HAVE_SPI0
int sam_spi0cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#ifdef SAMD2L2_HAVE_SPI1
int sam_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#ifdef SAMD2L2_HAVE_SPI2
int sam_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#ifdef SAMD2L2_HAVE_SPI3
int sam_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#ifdef SAMD2L2_HAVE_SPI4
int sam_spi4cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#ifdef SAMD2L2_HAVE_SPI5
int sam_spi5cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return OK;
}
#endif
#endif /* CONFIG_SPI_CMDDATA */
#endif /* SAMD2L2_HAVE_SPI */

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/****************************************************************************
* boards/arm/samd2l2/arduino-m0/src/sam_userleds.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 is a LED on board the Arduino M0.
*
* This LED is controlled by PA17 and the LED can be activated by driving PA17
* to High.
*
* 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 <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <debug.h>
#include <arch/board/board.h>
#include "sam_port.h"
#include "arduino_m0.h"
#ifndef CONFIG_ARCH_LEDS
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_userled_initialize
*
* Description:
* If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
* LEDs. If CONFIG_ARCH_LEDS is not defined, then the
* board_userled_initialize() is available to initialize the LED from user
* application logic.
*
****************************************************************************/
void board_userled_initialize(void)
{
(void)sam_configport(PORT_STATUS_LED);
}
/****************************************************************************
* Name: board_userled
*
* Description:
* If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
* LEDs. If CONFIG_ARCH_LEDS is not defined, then the board_userled() is
* available to control the LED from user application logic.
*
****************************************************************************/
void board_userled(int led, bool ledon)
{
if (led == BOARD_STATUS_LED)
{
sam_portwrite(PORT_STATUS_LED, !ledon);
}
}
/****************************************************************************
* Name: board_userled_all
*
* Description:
* If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
* LEDs.
* If CONFIG_ARCH_LEDS is not defined, then the board_userled_all() 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 board_userled_all(uint8_t ledset)
{
board_userled(BOARD_STATUS_LED, (ledset & BOARD_STATUS_LED_BIT) != 0);
}
#endif /* !CONFIG_ARCH_LEDS */

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/**************************************************************************** /****************************************************************************
* boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h * boards/arm/stm32/stm32f4discovery/src/stm32f4discovery.h
* *
* Copyright (C) 2011-2012, 2015-2016, 2018 Gregory Nutt. All rights * Copyright (C) 2011-2012, 2015-2016, 2018-2019 Gregory Nutt. All rights
* reserved. * reserved.
* Author: Gregory Nutt <gnutt@nuttx.org> * Author: Gregory Nutt <gnutt@nuttx.org>
* *