Equipment: We use Xavier NX SOM module on the Nano devkit carrier board.
For our AI application, we need to modify UART1_TXD (40 pin header pin 8) to GPIO
We use Jetson_Xavier_NX_Pinmux_Configuration_Template_v1.06 file, and change
UART1_TXD’s customer Usage from UA3_TXD to GPIO(R,2)
Pin Direction from output to input
Req. Initial State to Int PD
Then we create a new tegra19x-mb1-pinmux-p3668-a01.cfg and flash it to Xavier NX ( on Jetson nano dev carrier board)
It seems work if we set GPIO sysfs to output L/H, however, it failed if we set it to input.
Even though we use this GPIO pin to GND or 3.3V, the value of GPIO stick to 0
Could you tell us how to do the setting to make the GPIO input function work on UART1_TXD (40 pin header pin8)?