2014-09-09 15:30:36 +01:00
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Intel Edison {#edison}
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=============
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2015-05-06 02:36:36 +02:00
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Intel(R) Edison is a dual-core Silvermont Atom(TM) clocked at 500MHz. The
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Edison also features 4GB of storage, 1GB ram and on-board WiFi and Bluetooth.
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2014-09-09 15:30:36 +01:00
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2015-05-06 02:36:36 +02:00
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Currently supported boards:
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2014-10-08 18:03:40 +01:00
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- Intel Arduino board
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- Intel breakout board
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2014-09-09 15:30:36 +01:00
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2014-10-19 16:25:47 +01:00
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UART
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----
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2015-05-06 02:36:36 +02:00
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On both the Arduino board and the breakout board, The available UART interface is on /dev/ttyMFD1
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2014-10-08 18:03:40 +01:00
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Intel Arduino board
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-------------------
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2014-09-09 15:30:36 +01:00
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The Edison used with the Arduino board has the following limitations
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in libmraa:
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2016-02-17 11:15:31 +00:00
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- Do not use the 'reset' button on the arduino shields, there is a hardware
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bug and the platform will likely not come back up correctly
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2015-05-06 02:36:36 +02:00
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- I2C is exposed on i2c-6, therefore you must use bus 6 and not bus 0
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- PWM available on default swizzler positions. (3,5,6,9)
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2014-09-09 15:30:36 +01:00
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- SPI exposed is also used for the ADC. Try not to use your own CS.
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2015-02-27 16:50:55 +00:00
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- Max SPI speed is 25Mhz/4 ~6.25Mhz
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- SPI PM can sometimes do weird things you can disable it with:
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2015-05-06 02:36:36 +02:00
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`echo on > /sys/devices/pci0000\:00/0000\:00\:07.1/power/control`
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2015-06-07 09:56:37 +02:00
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- ADC kernel module will return 16bit number but the ADC itself only has an
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accuracy of maximum 12bits and in MRAA it's limited to 10bits by default.
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Use `mraa_aio_set_bit(12)` to switch to the maximum resolution mode.
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This ADC is only included on the Arduino board.
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2015-05-06 02:36:36 +02:00
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- AIO pins are treated as 0-5 in `mraa_aio_init()` but as 14-19 for everything
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else. Therefore use `mraa_gpio_init(14)` to use A0 as a GPIO
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- Arduino pin 7 can sometimes negatively impact the WiFi capability, if using
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WiFi avoid using this pin
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2016-01-05 15:16:08 +00:00
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- Edison's i2c-1 can be used using for example the sparkfun i2c breakout ontop
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of the Arduino breakout board, this is not supported officially so asking for
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mraa_i2c_init(1) will result in getting i2c bus 6 (the default one). However
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using raw mode (mraa_i2c_init_raw(1)) this bus is fully usable
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2016-03-24 09:45:05 +00:00
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- If you want to use /dev/ttyMFD2 you have to use the raw uart mode passing a
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std::string or char* argument of "/dev/ttyMFD2" to mraa:Uart() or
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mraa_uart_init_raw. By default there is a getty running on that interface so
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you will need to disable that first
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2014-10-08 18:03:40 +01:00
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2015-05-06 02:36:36 +02:00
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Because of the way IO is setup with the tristate on the Arduino breakout board
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2015-04-15 21:05:16 +01:00
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IO will be flipped as it is setup. It's recommended to setup IO pins &
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2015-05-06 02:36:36 +02:00
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direction before using them in a `setup()` method or similar. It's impossible on
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2015-04-15 21:05:16 +01:00
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this platform to avoid some GPIOs flipping on setup.
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2014-11-24 10:51:27 +00:00
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Intel(R) breakout board
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-----------------------
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2014-10-08 18:03:40 +01:00
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2015-05-06 02:36:36 +02:00
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- Both I2C buses are available 1 & 6
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2014-11-19 23:52:13 +00:00
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- IO on the miniboard is 1.8V
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2015-08-25 15:02:01 +01:00
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- Requesting GPIO 4 will break your FTDI UART console, so bear in mind when trying to use it
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2014-10-08 18:03:40 +01:00
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Please see the following table on how the physical pins map to mraa pin numbers
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| MRAA Number | Physical Pin | Edison Pin | Notes | Pinmode0 | Pinmode1 | Pinmode2 |
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|-------------|--------------|---------------|-------------------------|----------|------------|----------|
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| 0 | J17-1 | GP182 | | GPIO-182 | PWM2 | |
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| 1 | J17-2 | NC | Nothing from mraa | | | |
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| 2 | J17-3 | NC | Nothing from mraa | | | |
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| 3 | J17-4 | VIN | Nothing from mraa | | | |
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| 4 | J17-5 | GP135 | | GPIO-135 | UART | |
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| 5 | J17-6 | RCVR_MODE | Nothing from mraa | | | |
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| 6 | J17-7 | GP27 | | GPIO-27 | I2C-6-SCL | |
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| 7 | J17-8 | GP20 | | GPIO-20 | I2C-1-SDA | |
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| 8 | J17-9 | GP28 | | GPIO-28 | I2C-6-SDA | |
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| 9 | J17-10 | GP111 | | GPIO-111 | SPI-5-CS1 | |
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| 10 | J17-11 | GP109 | | GPIO-109 | SPI-5-SCK | |
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| 11 | J17-12 | GP115 | | GPIO-115 | SPI-5-MOSI | |
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| 12 | J17-13 | OSC_CLK_OUT_0 | Nothing from mraa/check | | | |
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| 13 | J17-14 | GP128 | | GPIO-128 | UART-1-CTS | |
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| 14 | J18-1 | GP13 | | GPIO-13 | PWM1 | |
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| 15 | J18-2 | GP165 | | GPIO-165 | | |
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| 16 | J18-3 | GPI_PWRBTN_N | Nothing from mraa | | | |
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| 17 | J18-4 | MSIC_SLP_CLK2 | Nothing from mraa | | | |
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| 18 | J18-5 | V_VBAT_BKUP | Nothing from mraa | | | |
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| 19 | J18-6 | GP19 | | GPIO-19 | I2C-1-SCL | |
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| 20 | J18-7 | GP12 | PWM0 | GPIO-12 | PWM0 | |
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| 21 | J18-8 | GP183 | PWM3 | GPIO-183 | PWM3 | |
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| 22 | J18-9 | NC | Nothing from mraa | | | |
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| 23 | J18-10 | GP110 | | GPIO-110 | SPI-5-CS0 | |
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| 24 | J18-11 | GP114 | | GPIO-114 | SPI-5-MISO | |
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| 25 | J18-12 | GP129 | | GPIO-129 | UART-1-RTS | |
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| 26 | J18-13 | GP130 | | GPIO-130 | UART-1-RX | |
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| 27 | J18-14 | FW_RCVR | Nothing from mraa | | | |
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| 28 | J19-1 | NC | Nothing from mraa | | | |
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| 29 | J19-2 | V_V1P80 | Nothing from mraa | | | |
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| 30 | J19-3 | GND | Nothing from mraa | | | |
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| 31 | J19-4 | GP44 | | GPIO-44 | | |
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| 32 | J19-5 | GP46 | | GPIO-46 | | |
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| 33 | J19-6 | GP48 | | GPIO-48 | | |
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| 34 | J19-7 | RESET_OUT | Nothing from mraa | | | |
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| 35 | J19-8 | GP131 | | GPIO-131 | UART-1-TX | |
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| 36 | J19-9 | GP14 | | GPIO-14 | | |
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| 37 | J19-10 | GP40 | | GPIO-40 | SSP2_CLK | |
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| 38 | J19-11 | GP43 | | GPIO-43 | SSP2_TXD | |
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| 39 | J19-12 | GP77 | | GPIO-77 | SD | |
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| 40 | J19-13 | GP82 | | GPIO-82 | SD | |
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| 41 | J19-14 | GP83 | | GPIO-83 | SD | |
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| 42 | J20-1 | V_VSYS | Nothing from mraa | | | |
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| 43 | J20-2 | V_V3P30 | Nothing from mraa | | | |
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| 44 | J20-3 | GP134 | | | | |
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| 45 | J20-4 | GP45 | | GPIO-45 | | |
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| 46 | J20-5 | GP47 | | GPIO-47 | | |
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| 47 | J20-6 | GP49 | | GPIO-49 | | |
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| 48 | J20-7 | GP15 | | GPIO-15 | | |
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| 49 | J20-8 | GP84 | | GPIO-84 | SD | |
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| 50 | J20-9 | GP42 | | GPIO-42 | SSP2_RXD | |
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| 51 | J20-10 | GP41 | | GPIO-41 | SSP2_FS | |
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| 52 | J20-11 | GP78 | | GPIO-78 | SD | |
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| 53 | J20-12 | GP79 | | GPIO-79 | SD | |
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| 54 | J20-13 | GP80 | | GPIO-80 | SD | |
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| 55 | J20-14 | GP81 | | GPIO-81 | SD | |
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