/usr/bin/gpioset

Usage: /usr/bin/gpioset [OPTIONS] <line=value>...

Set values of GPIO lines.

Lines are specified by name, or optionally by offset if the chip option
is provided.
Values may be '1' or '0', or equivalently 'active'/'inactive' or 'on'/'off'.

The line output state is maintained until the process exits, but after that
is not guaranteed.

Options:
      --banner		display a banner on successful startup
  -b, --bias <bias>	specify the line bias
			Possible values: 'pull-down', 'pull-up', 'disabled'.
			(default is to leave bias unchanged)
      --by-name		treat lines as names even if they would parse as an offset
  -c, --chip <chip>	restrict scope to a particular chip
  -C, --consumer <name>	consumer name applied to requested lines (default is 'gpioset')
  -d, --drive <drive>	specify the line drive mode
			Possible values: 'push-pull', 'open-drain', 'open-source'.
			(default is 'push-pull')
  -h, --help		display this help and exit
  -i, --interactive	set the lines then wait for additional set commands
			Use the 'help' command at the interactive prompt to get help
			for the supported commands.
  -l, --active-low	treat the line as active low
  -p, --hold-period <period>
			the minimum time period to hold lines at the requested values
  -s, --strict		abort if requested line names are not unique
  -t, --toggle <period>[,period]...
			toggle the line(s) after the specified period(s)
			If the last period is 0 then gpioset exits else the sequence repeats.
      --unquoted	don't quote line names
  -v, --version		output version information and exit
  -z, --daemonize	set values then detach from the controlling terminal

Chips:
    A GPIO chip may be identified by number, name, or path.
    e.g. '0', 'gpiochip0', and '/dev/gpiochip0' all refer to the same chip.

Periods:
    Periods are taken as milliseconds unless units are specified. e.g. 10us.
    Supported units are 'm', 's', 'ms', and 'us' for minutes, seconds, milliseconds and
    microseconds respectively.

*Note*
    It should not be assumed that a line will retain its state after gpioset exits.
    When a process exits, any GPIO lines it has requested are automatically released.
    Once released, the state of a line may be modified by the kernel or another process.
    To guarantee the requested value, by default gpioset does not exit.