Is it possible for gpioset version 2.0.2 to exit immediately?

Question

There is an option -p which is stated to be:

the minimum time period to hold lines at the requested values

When I execute with -p, the command hangs:

gpioset -p 0 My-led=1

The gpio line is set correctly, but the program does not terminate. If I set the time to 1, the command also does not exit.

Some man pages show this option:

-m, --mode=[exit|wait|time|signal] (defaults to 'exit')

However this option no longer exists.

The only think I could come up with:

gpioset -z My-led=1;pkill gpioset

-z, --daemonize set values then detach from the controlling terminal

Answer 1

Sure, try

gpioset -t0 My-led=1

to get the immediate exit behavior of v1.

The -p option is useful in combination with the -t to ensure the line is held for at least that long before toggling/exiting, and with the --interactive mode to ensure commands cannot toggle lines faster than a given rate.

The -t option can also be used to drive a sequence out a line, then exit if 0 terminated else repeat. e.g. -t3,1 will blink a line with a 75% duty cycle indefinitely, while -t3,1,0 will exit after one cycle.