GPIO read/set utility

Werner Almesberger werner at
Fri Feb 22 12:53:42 CET 2008

I made a little utility to read and set GPIO pins from the shell:


# gpio
Displays all GPIOs.

# watch -n 1 -d gpio
Monitors all GPIOs for changes.

# gpio b2=1
Sets the red LED on GTA02.

# gpio b2
Displays the red LED setting.

Alas, the latter also reveals a hardware bug. More about this later.

- Werner

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