745 lines
34 KiB
Plaintext
745 lines
34 KiB
Plaintext
README
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======
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This README discusses issues unique to NuttX configurations for the
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Atmel SAMD21 Xplained Pro development board. This board features the
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ATSAMD21J18A MCU.
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The SAMD21 Xplained Pro Starter Kit may be bundled with three modules:
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1) I/O1 - An MMC/SD card slot, PWM LED control, ADC light sensor, USART
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loopback, TWI AT30TSE758 Temperature sensor.
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2) OLED1 - An OLED plus 3 additional switches and 3 additional LEDs
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3) PROTO1 - A prototyping board with logic on board (other than power-related
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logic).
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Contents
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========
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- STATUS/ISSUES
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- Modules
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- LEDs
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- Serial Consoles
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- Atmel Studio 6.1
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- SAMD21 Xplained Pro-specific Configuration Options
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- Configurations
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STATUS/ISSUES
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=============
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1. See boards/arm/samd2l2/samd20-xplained/README.txt.
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This port derives from the SAMD20 Xplained board board and all issues
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there should apply.
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2. 2015-07-06: The basic NSH configuration is working properly, but
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not at 115200 baud which is the default BAUD selection in the
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configurations. It is necessary to drop the BAUD in the
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configuration.
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I suspect that this is an issue on my board and due to running the
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system on uncalibrated OSC8M. My bet is that the issue would not
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exist on many boards or if OSC8M were calibrated or if a more precise
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clock source were used (like XOSC32K).
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... After more experimentation, I am not sure this conclusion is
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correct or not. Perhaps the board just comes up with a bad clocking
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configuration at times????
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Modules
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=======
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There are several I/O modules available that will work with the SAMD21
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Xplained Pro Starter Kit:
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1) I/O1 - An MMC/SD card slot, PWM LED control, ADC light sensor, USART
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loopback, TWI AT30TSE758 Temperature sensor.
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2) OLED1 - An OLED plus 3 additional switches and 3 additional LEDs
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3) PROTO1 - A prototyping board with logic on board (other than power-
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related logic).
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4) And others. See http://www.atmel.com/products/microcontrollers/avr/xplained.aspx
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Some of these are discussed further below.
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I/O1
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----
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The primary function of this module is to provide SD card support, but
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the full list of modules features include:
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- microSD card connector (SPI interface)
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- PWM (LED control)
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- ADC (light sensor)
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- USART loopback
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- TWI AT30TSE758 Temperature sensor with EEPROM
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SPI is available on two of the SAMD21 Xplained connectors, EXT1 and EXT2.
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They mate with the I/O1 connector as indicated in this table.
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I/O1 CONNECTOR
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----------------- ---------------------- ---------------------- ------------------------------------
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I/O1 EXT1 EXT2 Other use of either pin
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----------------- ---------------------- ---------------------- ------------------------------------
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1 ID 1 1 Communication line to ID chip on
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extension board.
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----------------- ---------------------- ---------------------- ------------------------------------
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2 GND 2 GND 2 GND
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----------------- ---------------------- ---------------------- ------------------------------------
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3 LIGHT_SENSOR 3 PB00 AIN[8] 3 PA10 AIN[18]
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----------------- ---------------------- ---------------------- ------------------------------------
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4 LP_OUT 4 PB01 AIN[9] 4 PA11 AIN[19]
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----------------- ---------------------- ---------------------- ------------------------------------
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5 GPIO1 5 PB06 GPIO 5 PA20 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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6 GPIO2 6 PB07 GPIO 6 PA21 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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7 LED 7 PB02 TC6/WO[0] 7 PB12 TC4/WO[0]
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----------------- ---------------------- ---------------------- ------------------------------------
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8 LP_IN 8 PB03 TC6/WO[1] 8 PB13 TC4/WO[1]
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----------------- ---------------------- ---------------------- ------------------------------------
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9 TEMP_ALERT 9 PB04 EXTINT[4] 9 PB14 EXTINT[14]
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----------------- ---------------------- ---------------------- ------------------------------------
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10 microSD_DETECT 10 PB05 GPIO 10 PB15 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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11 TWI SDA 11 PA08 SERCOM2 PAD[0] 11 PA08 SERCOM2 PAD[0] EXT1, EXT2, EXT3 and EDBG
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I²C SDA I²C SDA
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----------------- ---------------------- ---------------------- ------------------------------------
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12 TWI SCL 12 PA09 SERCOM2 PAD[1] 12 PA09 SERCOM2 PAD[1] EXT2, EXT3 and EDBG
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I²C SCL I²C SCL
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----------------- ---------------------- ---------------------- ------------------------------------
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13 USART RX 13 PB09 SERCOM4 PAD[1] 13 PB11 SERCOM4 PAD[1] EXT3
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USART RX USART RX
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----------------- ---------------------- ---------------------- ------------------------------------
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14 USART TX 14 PB08 SERCOM4 PAD[0] 14 PB10 SERCOM4 PAD[0] EXT3
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USART TX USART TX
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----------------- ---------------------- ---------------------- ------------------------------------
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15 microSD_SS 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1]
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SPI SS SPI SS
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----------------- ---------------------- ---------------------- ------------------------------------
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16 SPI_MOSI 16 PA06 SERCOM0 PAD[2] 16 PA18 SERCOM1 PAD[2]
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SPI MOSI SPI MOSI
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----------------- ---------------------- ---------------------- ------------------------------------
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17 SPI_MISO 17 PA04 SERCOM0 PAD[0] 17 PA16 SERCOM1 PAD[0]
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SPI MISO SPI MISO
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----------------- ---------------------- ---------------------- ------------------------------------
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18 SPI_SCK 18 PA07 SERCOM0 PAD[3] 18 PA19 SERCOM1 PAD[3]
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SPI SCK SPI SCK
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----------------- ---------------------- ---------------------- ------------------------------------
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19 GND 19 GND GND
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----------------- ---------------------- ---------------------- ------------------------------------
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20 VCC 20 VCC VCC
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----------------- ---------------------- ---------------------- ------------------------------------
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The mapping between the I/O1 pins and the SD connector are shown in the
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following table.
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SD Card Connection
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------------------
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I/O1 SD PIN Description
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---- ---- --- -------------------------------------------------
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D2 1 Data line 2 (not used)
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15 D3 2 Data line 3. Active low chip select, pulled high
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16 CMD 3 Command line, connected to SPI_MOSI.
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20 VDD 4
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18 CLK 5 Clock line, connected to SPI_SCK.
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2/19 GND 6
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17 D0 7 Data line 0, connected to SPI_MISO.
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D1 8 Data line 1 (not used)
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10 SW_A 9 Card detect
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2/19 SW_B 10 GND
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Card Detect
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-----------
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When a microSD card is put into the connector SW_A and SW_B are short-
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circuited. SW_A is connected to the microSD_DETECT signal. To use this
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as a card indicator remember to enable internal pullup in the target
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device.
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GPIOs
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-----
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So all that is required to connect the SD is configure the SPI
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--- ------------------ ---------------------- -------------------------------------
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PIN EXT1 EXT2 Description
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--- ------------------ ---------------------- -------------------------------------
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15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1] Active low chip select OUTPUT, pulled
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SPI SS SPI SS high on board.
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--- ------------------ ---------------------- -------------------------------------
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10 PB05 GPIO 10 PB15 GPIO Active low card detect INPUT, must
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use internal pull-up.
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--- ------------------ ---------------------- -------------------------------------
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Configuration Options:
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----------------------
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CONFIG_SAMD21_XPLAINED_IOMODULE=y : Informs the system that the
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I/O1 module is installed
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CONFIG_SAMD21_XPLAINED_IOMODULE_EXT1=y : The module is installed in EXT1
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CONFIG_SAMD21_XPLAINED_IOMODULE_EXT2=y : The mdoule is installed in EXT2
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See the set-up in the discussion of the nsh configuration below for other
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required configuration options.
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NOTE: As of this writing, only the SD card slot is supported in the I/O1
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module.
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OLED1
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-----
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This module provides an OLED plus 3 additional switches and 3 additional
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LEDs.
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OLED1 CONNECTOR
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----------------- ---------------------- ---------------------- ------------------------------------
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OLED1 EXT1 EXT2 Other use of either pin
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----------------- ---------------------- ---------------------- ------------------------------------
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1 ID 1 1 Communication line to ID chip on
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extension board.
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----------------- ---------------------- ---------------------- ------------------------------------
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2 GND 2 GND 2 GND
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----------------- ---------------------- ---------------------- ------------------------------------
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3 BUTTON2 3 PB00 AIN[8] 3 PA10 AIN[18]
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----------------- ---------------------- ---------------------- ------------------------------------
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4 BUTTON3 4 PB01 AIN[9] 4 PA11 AIN[19]
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----------------- ---------------------- ---------------------- ------------------------------------
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5 DATA_CMD_SEL 5 PB06 GPIO 5 PA20 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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6 LED3 6 PB07 GPIO 6 PA21 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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7 LED1 7 PB02 TC6/WO[0] 7 PB12 TC4/WO[0]
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----------------- ---------------------- ---------------------- ------------------------------------
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8 LED2 8 PB03 TC6/WO[1] 8 PB13 TC4/WO[1]
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----------------- ---------------------- ---------------------- ------------------------------------
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9 BUTTON1 9 PB04 EXTINT[4] 9 PB14 EXTINT[14]
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----------------- ---------------------- ---------------------- ------------------------------------
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10 DISPLAY_RESET 10 PB05 GPIO 10 PB15 GPIO
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----------------- ---------------------- ---------------------- ------------------------------------
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11 N/C 11 PA08 SERCOM2 PAD[0] 11 PA08 SERCOM2 PAD[0] EXT1, EXT2, EXT3 and EDBG
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I²C SDA I²C SDA
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----------------- ---------------------- ---------------------- ------------------------------------
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12 N/C 12 PA09 SERCOM2 PAD[1] 12 PA09 SERCOM2 PAD[1] EXT2, EXT3 and EDBG
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I²C SCL I²C SCL
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----------------- ---------------------- ---------------------- ------------------------------------
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13 N/C 13 PB09 SERCOM4 PAD[1] 13 PB11 SERCOM4 PAD[1] EXT3
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USART RX USART RX
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----------------- ---------------------- ---------------------- ------------------------------------
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14 N/C 14 PB08 SERCOM4 PAD[0] 14 PB10 SERCOM4 PAD[0] EXT3
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USART TX USART TX
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----------------- ---------------------- ---------------------- ------------------------------------
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15 DISPLAY_SS 15 PA05 SERCOM0 PAD[1] 15 PA17 SERCOM1 PAD[1]
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SPI SS SPI SS
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----------------- ---------------------- ---------------------- ------------------------------------
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16 SPI_MOSI 16 PA06 SERCOM0 PAD[2] 16 PA18 SERCOM1 PAD[2]
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SPI MOSI SPI MOSI
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----------------- ---------------------- ---------------------- ------------------------------------
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17 N/C 17 PA04 SERCOM0 PAD[0] 17 PA16 SERCOM1 PAD[0]
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SPI MISO SPI MISO
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----------------- ---------------------- ---------------------- ------------------------------------
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18 SPI_SCK 18 PA07 SERCOM0 PAD[3] 18 PA19 SERCOM1 PAD[3]
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SPI SCK SPI SCK
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----------------- ---------------------- ---------------------- ------------------------------------
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19 GND 19 GND GND
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----------------- ---------------------- ---------------------- ------------------------------------
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20 VCC 20 VCC VCC
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----------------- ---------------------- ---------------------- ------------------------------------
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Configuration Options:
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----------------------
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CONFIG_SAMD21_XPLAINED_OLED1MODULE=y : Informs the system that the
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I/O1 module is installed
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CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT1=y : The module is installed in EXT1
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CONFIG_SAMD21_XPLAINED_OLED1MODULE_EXT2=y : The mdoule is installed in EXT2
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See the set-up in the discussion of the nsh configuration below for other
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required configuration options.
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PROTO1
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------
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A prototyping board with logic on board (other than power-related logic).
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There is no built-in support for the PROTO1 module.
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LEDs
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====
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There is one yellow LED available on the SAM D20 Xplained Pro board that
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can be turned on and off. The LED can be activated by driving the connected
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PB30 I/O line to GND.
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When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
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control the LED as follows:
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SYMBOL Meaning LED0
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------------------- ----------------------- ------
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LED_STARTED NuttX has been started OFF
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LED_HEAPALLOCATE Heap has been allocated OFF
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LED_IRQSENABLED Interrupts enabled OFF
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LED_STACKCREATED Idle stack created ON
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LED_INIRQ In an interrupt N/C
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LED_SIGNAL In a signal handler N/C
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LED_ASSERTION An assertion failed N/C
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LED_PANIC The system has crashed FLASH
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Thus is LED is statically on, NuttX has successfully booted and is,
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apparently, running normally. If LED is flashing at approximately
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2Hz, then a fatal error has been detected and the system has halted.
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Serial Consoles
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===============
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SERCOM4
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------
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SERCOM4 is available on connectors EXT1, EXT2, and EXT3, but using
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different PORT pins:
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PIN EXT1 EXT2 EXT3 GPIO Function
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---- ---- ---- ---- ------------------
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13 PB09 PB10 PB10 SERCOM4 / USART RX
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14 PB08 PB11 PB11 SERCOM4 / USART TX
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19 GND GND GND N/A
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20 VCC VCC VCC N/A
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There are options available in the NuttX configuration to select which
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connector SERCOM4 is on: SAMD21_XPLAINED_USART4_EXTn, where n=1, 2, or 3.
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If you have a TTL to RS-232 converter then this is the most convenient
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serial console to use (because you don't lose the console device each time
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you lose the USB connection). It is the default in all of these
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configurations. An option is to use the virtual COM port.
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Virtual COM Port
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----------------
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The SAMD21 Xplained Pro contains an Embedded Debugger (EDBG) that can be
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used to program and debug the ATSAMD21J18A using Serial Wire Debug (SWD).
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The Embedded debugger also include a Virtual COM port interface over
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SERCOM3. Virtual COM port connections:
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PA22 SERCOM3 / USART TXD
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PA23 SERCOM3 / USART RXD
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Atmel Studio 6.1
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================
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Loading Code into FLASH:
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-----------------------
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Tools menus: Tools -> Device Programming.
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Debugging the NuttX Object File
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-------------------------------
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1) Rename object file from nutt to nuttx.elf. That is an extension that
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will be recognized by the file menu.
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2) File menu: File -> Open -> Open object file for debugging
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- Select nuttx.elf object file
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- Select AT91SAMD21J18
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- Select files for symbols as desired
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- Select debugger
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3) Debug menu: Debug -> Start debugging and break
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- This will reload the nuttx.elf file into FLASH
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SAMD21 Xplained Pro-specific Configuration Options
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==================================================
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CONFIG_ARCH - Identifies the arch/ subdirectory. This should
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be set to:
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CONFIG_ARCH=arm
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CONFIG_ARCH_family - For use in C code:
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CONFIG_ARCH_ARM=y
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CONFIG_ARCH_architecture - For use in C code:
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CONFIG_ARCH_CORTEXM0=y
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
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CONFIG_ARCH_CHIP="samd2l2"
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CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
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chip:
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CONFIG_ARCH_CHIP_SAMD2X
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CONFIG_ARCH_CHIP_SAMD21
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CONFIG_ARCH_CHIP_ATSAMD21J18
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CONFIG_ARCH_BOARD - Identifies the boards/ subdirectory and
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hence, the board that supports the particular chip or SoC.
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CONFIG_ARCH_BOARD=samd21-xplained (for the SAMD21 Xplained Pro development board)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_SAMD21_XPLAINED=y
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CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
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of delay loops
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CONFIG_ENDIAN_BIG - define if big endian (default is little
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endian)
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CONFIG_RAM_SIZE - Describes the installed DRAM (SRAM in this case):
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CONFIG_RAM_SIZE=0x00010000 (64KB)
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CONFIG_RAM_START - The start address of installed DRAM
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CONFIG_RAM_START=0x20000000
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
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have LEDs
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CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
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stack. If defined, this symbol is the size of the interrupt
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stack in bytes. If not defined, the user task stacks will be
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used during interrupt handling.
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CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
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Individual subsystems can be enabled:
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CONFIG_SAMD2L2_AC - Analog Comparator
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CONFIG_SAMD2L2_ADC - Analog-to-Digital Converter
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CONFIG_SAMD2L2_DAC - Digital-to-Analog Converter
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CONFIG_SAMD2L2_DMAC - Analog Comparator
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CONFIG_SAMD2L2_EVSYS - Event System
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CONFIG_SAMD2L2_NVMCTRL - Non-Volatile Memory Controller
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CONFIG_SAMD2L2_PTC - Peripheral Touch Controller
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CONFIG_SAMD2L2_RTC - Real Time Counter
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CONFIG_SAMD2L2_SERCOM0 - Serial Communication Interface 0
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CONFIG_SAMD2L2_SERCOM1 - Serial Communication Interface 1
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CONFIG_SAMD2L2_SERCOM2 - Serial Communication Interface 2
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CONFIG_SAMD2L2_SERCOM3 - Serial Communication Interface 3
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CONFIG_SAMD2L2_SERCOM4 - Serial Communication Interface 4
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CONFIG_SAMD2L2_SERCOM5 - Serial Communication Interface 5
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CONFIG_SAMD2L2_TCC0 - Timer/Counter 0 for Control
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CONFIG_SAMD2L2_TCC1 - Timer/Counter 1 for Control
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CONFIG_SAMD2L2_TCC2 - Timer/Counter 2 for Control
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CONFIG_SAMD2L2_TC3 - Timer/Counter 3
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CONFIG_SAMD2L2_TC4 - Timer/Counter 4
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CONFIG_SAMD2L2_TC5 - Timer/Counter 5
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CONFIG_SAMD2L2_TC6 - Timer/Counter 6
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CONFIG_SAMD2L2_TC7 - Timer/Counter 6
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CONFIG_SAMD2L2_USB - USB device or host
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CONFIG_SAMD2L2_WDT - Watchdog Timer
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Some subsystems can be configured to operate in different ways. The drivers
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need to know how to configure the subsystem.
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CONFIG_SAMD2L2_SERCOM0_ISI2C, CONFIG_SAMD2L2_SERCOM0_ISSPI, or CONFIG_SAMD2L2_SERCOM0_ISUSART
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CONFIG_SAMD2L2_SERCOM1_ISI2C, CONFIG_SAMD2L2_SERCOM1_ISSPI, or CONFIG_SAMD2L2_SERCOM1_ISUSART
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CONFIG_SAMD2L2_SERCOM2_ISI2C, CONFIG_SAMD2L2_SERCOM2_ISSPI, or CONFIG_SAMD2L2_SERCOM2_ISUSART
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CONFIG_SAMD2L2_SERCOM3_ISI2C, CONFIG_SAMD2L2_SERCOM3_ISSPI, or CONFIG_SAMD2L2_SERCOM3_ISUSART
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CONFIG_SAMD2L2_SERCOM4_ISI2C, CONFIG_SAMD2L2_SERCOM4_ISSPI, or CONFIG_SAMD2L2_SERCOM4_ISUSART
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CONFIG_SAMD2L2_SERCOM5_ISI2C, CONFIG_SAMD2L2_SERCOM5_ISSPI, or CONFIG_SAMD2L2_SERCOM5_ISUSART
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SAMD21 specific device driver settings
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CONFIG_USARTn_SERIAL_CONSOLE - selects the USARTn (n=0,1,2,..5) for the
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console and ttys0 (default is the USART4).
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CONFIG_USARTn_RXBUFSIZE - Characters are buffered as received.
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This specific the size of the receive buffer
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CONFIG_USARTn_TXBUFSIZE - Characters are buffered before
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being sent. This specific the size of the transmit buffer
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CONFIG_USARTn_BAUD - The configure BAUD of the USART. Must be
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CONFIG_USARTn_BITS - The number of bits. Must be either 7 or 8.
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CONFIG_USARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
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CONFIG_USARTn_2STOP - Two stop bits
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Configurations
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==============
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Each SAMD21 Xplained Pro configuration is maintained in a sub-directory and
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can be selected as follow:
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tools/configure.sh samd21-xplained:<subdir>
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Before building, make sure the PATH environment variable include the
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correct path to the directory than holds your toolchain binaries.
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And then build NuttX by simply typing the following. At the conclusion of
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the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
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make
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The <subdir> that is provided above as an argument to the tools/configure.sh
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must be is one of the following.
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NOTE: These configurations use the mconf-based configuration tool. To
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|
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.
|
|
|
|
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_SAMD2L2_SERCOM3=y : Enable one or both
|
|
CONFIG_SAMD2L2_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 windows
|
|
|
|
4. These configurations use the ARM EABI toolchain. But
|
|
that is easily reconfigured:
|
|
|
|
System Type -> Toolchain:
|
|
CONFIG_ARM_TOOLCHAIN_GNU_EABI=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) '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.
|
|
|
|
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 ARM EABI 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_ARCH_SIZET_LONG.
|
|
|
|
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 NOTICE file for further
|
|
details.
|
|
|
|
System Type -> Peripherals:
|
|
CONFIG_SAMD2L2_SERCOM0=y : Use SERCOM0 if the I/O is in EXT1
|
|
CONFIG_SAMD2L2_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_MMCSD=y : Enable MMC/SD support
|
|
CONFIG_MMCSD_NSLOTS=1 : Only one MMC/SD card slot
|
|
CONFIG_MMCSD_MULTIBLOCK_LIMIT=0 : Should not need to disable multi-block transfers
|
|
CONFIG_MMCSD_MMCSUPPORT=n : May interfere with some SD cards
|
|
CONFIG_MMCSD_HAVE_CARDDETECT=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_SAMD2L2_SERCOM1=y : Use SERCOM1 if the I/O is in EXT2
|
|
CONFIG_SAMD2L2_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
|
|
|
|
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_NXSTART_EXTERNINIT=y : We have board_graphics_setup()
|
|
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.
|