I am testing a gpio on a TX2 board.
I use an oscilloscope to check the waveform.
Change the value by using the following command.
command example: echo 1 > /sys/class/gpio/gpio297/value
The pin number of gpio297 is J21-32.
However, when I type this command, I get the following error.
-su: echo: write error: Operation not permitted
What can I do?