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edison.md: Add notes on using i2c-1 w/Arduino breakout

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Closes #394

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
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Brendan Le Foll
2016-01-05 15:16:08 +00:00
parent 92cc9ea176
commit 7f85f2bbdb
1 changed files with 4 additions and 0 deletions
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docs/edison.md
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@@ -31,6 +31,10 @@ in libmraa:
else. Therefore use `mraa_gpio_init(14)` to use A0 as a GPIO else. Therefore use `mraa_gpio_init(14)` to use A0 as a GPIO
- Arduino pin 7 can sometimes negatively impact the WiFi capability, if using - Arduino pin 7 can sometimes negatively impact the WiFi capability, if using
WiFi avoid using this pin WiFi avoid using this pin
- Edison's i2c-1 can be used using for example the sparkfun i2c breakout ontop
of the Arduino breakout board, this is not supported officially so asking for
mraa_i2c_init(1) will result in getting i2c bus 6 (the default one). However
using raw mode (mraa_i2c_init_raw(1)) this bus is fully usable
Because of the way IO is setup with the tristate on the Arduino breakout board Because of the way IO is setup with the tristate on the Arduino breakout board
IO will be flipped as it is setup. It's recommended to setup IO pins & IO will be flipped as it is setup. It's recommended to setup IO pins &