pinctrl

Command-line tool from raspberrypi/utils for displaying and modifying GPIO and pin muxing state.

software also known as raspi-gpio

Knowledge about pinctrl

Debug GPIO from the shell with pinctrl: see pin modes, set levels, watch signalscode · unverified · pinctrl from raspberrypi/utils replaces raspi-gpio. It shows every GPIO's function and level, sets pins, lists alternate functions, and can poll pins as a basic logic analyser for slow signals.