TX2 GPIO

• 
  
• NVIDIA Jetson TX2 J21 Header Pinout

• ※ 左下方有 4 顆按鈕設置，由左至右分別為
  * Reset Button          (RST)
  * User Defined Button   (Vol)
  * Force Recovery Button (REC)
  * Power Button          (Power BTN)。

• 
  Jetson.GPIO - Linux for Tegra
  

1. sudo  cat /sys/kernel/debug/gpio
2. echo 314 > /sys/class/gpio/export
3. echo in >direction

Reference:

1. Nvidia : GPIO doesn't work?
2. Github: MengHuanLee/jetsonTX2GPIO
3. Jetson Download Center
4. Jetson TX2 J21 Header
5. How to control the GPIO to output the pull-up/pull-down level
6. How to configure a GPIO on TX2?
7. NVIDIA Jetson TX2 J21 Header Pinout