Complete GPIO module #128
Description
Implement https://github.com/Samsung/iotjs/wiki/GPIO-API-candidate
Related issue: #110, #117
Update document https://github.com/Samsung/iotjs/wiki/IoT.js-API:-GPIO
- JS API
- setPin (Start of GPIO implementation based on GPIO API #131)
- readPin , writePin (GPIO read write pin implementation for x86 linux #169)
- setPort, readPort, writePort
- x86 linux dummy
- arm-linux on Raspberry Pi 2
- arm-nuttx on STM32F4-discovery (gpio for nuttx #276)
- let
query()be in another task. we need to defined what and how.