LT-GPIOSET(1)

NAME
lt-gpioset - manual page for lt-gpioset v1.6.4

SYNOPSIS
lt-gpioset [OPTIONS] <chip name/number> <offset1>=<value1> <offset2>=<value2> ...

DESCRIPTION
Set GPIO line values of a GPIO chip and maintain the state until the process exits

OPTIONS

-h, --help:
    display this message and exit

-v, --version:
    display the version and exit

-l, --active-low:
    set the line active state to low

-B, --bias=[as-is|disable|pull-down|pull-up] (defaults to 'as-is'):

    set the line bias

-D, --drive=[push-pull|open-drain|open-source] (defaults to 'push-pull'):

    set the line drive mode

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

    tell the program what to do after setting values

-s, --sec=SEC:
    specify the number of seconds to wait (only valid for --mode=time)

-u, --usec=USEC:
    specify the number of microseconds to wait (only valid for --mode=time)

-b, --background:
    after setting values: detach from the controlling terminal

  Biases:

as-is:
    leave bias unchanged

disable:
    disable bias

pull-up:
    enable pull-up

pull-down:
    enable pull-down

  Drives:

push-pull:
    drive the line both high and low

open-drain:
    drive the line low or go high impedance

open-source:
    drive the line high or go high impedance

  Modes:

exit:
    set values and exit immediately

wait:
    set values and wait for user to press ENTER

time:
    set values and sleep for a specified amount of time

signal:
    set values and wait for SIGINT or SIGTERM

Note: the state of a GPIO line controlled over the character device reverts to default when the last process referencing the file descriptor representing the device file exits. This means that it's wrong to run gpioset, have it exit and expect the line to continue being driven high or low. It may happen if given pin is floating but it must be interpreted as undefined behavior.

AUTHOR
Bartosz Golaszewski <bartekgola@gmail.com>

REPORTING BUGS
Report bugs to:
    Bartosz Golaszewski <bartekgola@gmail.com>
    linux-gpio <linux-gpio@vger.kernel.org>

COPYRIGHT
Copyright © 2017-2018 Bartosz Golaszewski License: LGPLv2.1
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.