1Intel Edison {#edison} 2============= 3 4Intel(R) Edison is a dual-core Silvermont Atom(TM) clocked at 500MHz. The 5Edison also features 4GB of storage, 1GB ram and on-board WiFi and Bluetooth. 6 7Currently supported boards: 8- Intel Arduino board 9- Intel breakout board 10 11UART 12---- 13On both the Arduino board and the breakout board, The available UART interface is on /dev/ttyMFD1 14 15Intel Arduino board 16------------------- 17The Edison used with the Arduino board has the following limitations 18in libmraa: 19 20- I2C is exposed on i2c-6, therefore you must use bus 6 and not bus 0 21- PWM available on default swizzler positions. (3,5,6,9) 22- SPI exposed is also used for the ADC. Try not to use your own CS. 23- Max SPI speed is 25Mhz/4 ~6.25Mhz 24- SPI PM can sometimes do weird things you can disable it with: 25 `echo on > /sys/devices/pci0000\:00/0000\:00\:07.1/power/control` 26- ADC kernel module will return 16bit number but the ADC itself only has an 27 accuracy of maximum 12bits and in MRAA it's limited to 10bits by default. 28 Use `mraa_aio_set_bit(12)` to switch to the maximum resolution mode. 29 This ADC is only included on the Arduino board. 30- AIO pins are treated as 0-5 in `mraa_aio_init()` but as 14-19 for everything 31 else. Therefore use `mraa_gpio_init(14)` to use A0 as a GPIO 32- Arduino pin 7 can sometimes negatively impact the WiFi capability, if using 33 WiFi avoid using this pin 34- Edison's i2c-1 can be used using for example the sparkfun i2c breakout ontop 35 of the Arduino breakout board, this is not supported officially so asking for 36 mraa_i2c_init(1) will result in getting i2c bus 6 (the default one). However 37 using raw mode (mraa_i2c_init_raw(1)) this bus is fully usable 38 39Because of the way IO is setup with the tristate on the Arduino breakout board 40IO will be flipped as it is setup. It's recommended to setup IO pins & 41direction before using them in a `setup()` method or similar. It's impossible on 42this platform to avoid some GPIOs flipping on setup. 43 44Intel(R) breakout board 45----------------------- 46 47- Both I2C buses are available 1 & 6 48- IO on the miniboard is 1.8V 49- Requesting GPIO 4 will break your FTDI UART console, so bear in mind when trying to use it 50 51Please see the following table on how the physical pins map to mraa pin numbers 52 53| MRAA Number | Physical Pin | Edison Pin | Notes | Pinmode0 | Pinmode1 | Pinmode2 | 54|-------------|--------------|---------------|-------------------------|----------|------------|----------| 55| 0 | J17-1 | GP182 | | GPIO-182 | PWM2 | | 56| 1 | J17-2 | NC | Nothing from mraa | | | | 57| 2 | J17-3 | NC | Nothing from mraa | | | | 58| 3 | J17-4 | VIN | Nothing from mraa | | | | 59| 4 | J17-5 | GP135 | | GPIO-135 | UART | | 60| 5 | J17-6 | RCVR_MODE | Nothing from mraa | | | | 61| 6 | J17-7 | GP27 | | GPIO-27 | I2C-6-SCL | | 62| 7 | J17-8 | GP20 | | GPIO-20 | I2C-1-SDA | | 63| 8 | J17-9 | GP28 | | GPIO-28 | I2C-6-SDA | | 64| 9 | J17-10 | GP111 | | GPIO-111 | SPI-5-CS1 | | 65| 10 | J17-11 | GP109 | | GPIO-109 | SPI-5-SCK | | 66| 11 | J17-12 | GP115 | | GPIO-115 | SPI-5-MOSI | | 67| 12 | J17-13 | OSC_CLK_OUT_0 | Nothing from mraa/check | | | | 68| 13 | J17-14 | GP128 | | GPIO-128 | UART-1-CTS | | 69| 14 | J18-1 | GP13 | | GPIO-13 | PWM1 | | 70| 15 | J18-2 | GP165 | | GPIO-165 | | | 71| 16 | J18-3 | GPI_PWRBTN_N | Nothing from mraa | | | | 72| 17 | J18-4 | MSIC_SLP_CLK2 | Nothing from mraa | | | | 73| 18 | J18-5 | V_VBAT_BKUP | Nothing from mraa | | | | 74| 19 | J18-6 | GP19 | | GPIO-19 | I2C-1-SCL | | 75| 20 | J18-7 | GP12 | PWM0 | GPIO-12 | PWM0 | | 76| 21 | J18-8 | GP183 | PWM3 | GPIO-183 | PWM3 | | 77| 22 | J18-9 | NC | Nothing from mraa | | | | 78| 23 | J18-10 | GP110 | | GPIO-110 | SPI-5-CS0 | | 79| 24 | J18-11 | GP114 | | GPIO-114 | SPI-5-MISO | | 80| 25 | J18-12 | GP129 | | GPIO-129 | UART-1-RTS | | 81| 26 | J18-13 | GP130 | | GPIO-130 | UART-1-RX | | 82| 27 | J18-14 | FW_RCVR | Nothing from mraa | | | | 83| 28 | J19-1 | NC | Nothing from mraa | | | | 84| 29 | J19-2 | V_V1P80 | Nothing from mraa | | | | 85| 30 | J19-3 | GND | Nothing from mraa | | | | 86| 31 | J19-4 | GP44 | | GPIO-44 | | | 87| 32 | J19-5 | GP46 | | GPIO-46 | | | 88| 33 | J19-6 | GP48 | | GPIO-48 | | | 89| 34 | J19-7 | RESET_OUT | Nothing from mraa | | | | 90| 35 | J19-8 | GP131 | | GPIO-131 | UART-1-TX | | 91| 36 | J19-9 | GP14 | | GPIO-14 | | | 92| 37 | J19-10 | GP40 | | GPIO-40 | SSP2_CLK | | 93| 38 | J19-11 | GP43 | | GPIO-43 | SSP2_TXD | | 94| 39 | J19-12 | GP77 | | GPIO-77 | SD | | 95| 40 | J19-13 | GP82 | | GPIO-82 | SD | | 96| 41 | J19-14 | GP83 | | GPIO-83 | SD | | 97| 42 | J20-1 | V_VSYS | Nothing from mraa | | | | 98| 43 | J20-2 | V_V3P30 | Nothing from mraa | | | | 99| 44 | J20-3 | GP134 | | | | | 100| 45 | J20-4 | GP45 | | GPIO-45 | | | 101| 46 | J20-5 | GP47 | | GPIO-47 | | | 102| 47 | J20-6 | GP49 | | GPIO-49 | | | 103| 48 | J20-7 | GP15 | | GPIO-15 | | | 104| 49 | J20-8 | GP84 | | GPIO-84 | SD | | 105| 50 | J20-9 | GP42 | | GPIO-42 | SSP2_RXD | | 106| 51 | J20-10 | GP41 | | GPIO-41 | SSP2_FS | | 107| 52 | J20-11 | GP78 | | GPIO-78 | SD | | 108| 53 | J20-12 | GP79 | | GPIO-79 | SD | | 109| 54 | J20-13 | GP80 | | GPIO-80 | SD | | 110| 55 | J20-14 | GP81 | | GPIO-81 | SD | | 111