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joule: add pin naming system changes to README 

Signed-off-by: deadprogram <ron@hybridgroup.com>
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deadprogram 2017-05-06 10:08:02 +02:00
parent f4d7c220a3
commit 97893cd873
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platforms/intel-iot/joule/README.md
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@ -20,7 +20,7 @@ Everything you need to get started with the Joule is in the Intel Getting Starte
https://intel.com/joule/getstarted
Don't forget to configure your Joule's wifi connection and update your Joule to the latest firmware image!
Don't forget to configure your Joule's WiFi connection and update your Joule to the latest firmware image. Gobot has been tested using the reference OS based on Ostro.
## How To Use
@ -83,10 +83,10 @@ over once again and start it from the command line (via screen).
## Pin Mapping
The Gobot pin mapping for the Intel Joule uses the same numbering as the MRAA library does, as documented here:
The Gobot pin mapping for the Intel Joule uses a naming system based on how the pins are labeled on the board itself.
https://software.intel.com/en-us/pin-mapping-for-carrier-board-joule
There are 2 jumpers on the Joule expansion board, labeled "J12" and "J13". There are 2 rows of pins on each jumper, labeled from 1 to 40. So to use the 26th pin of jumper J12, you use pin name "J12_26".
Of special note are the pins that control the build-in LEDs, which are pins 100 thru 103, as used in the example above.
In addition, there are pins that control the build-in LEDs (pins 100 thru 103) as used in the example above.
The i2c interfaces on the Intel Joule developer kit board require that you terminate the SDA & SCL lines using 2 10K resistors pulled up to the voltage used for the i2c device, for example 5V.