gpiomon(1)

NAME

gpiomon - libgpiod command-line utility

SYNOPSIS

gpiomon [OPTIONS] <line>...

DESCRIPTION

Wait for events on GPIO lines and print them to standard output.

Lines are specified by name, or optionally by offset if the chip option is provided.

OPTIONS

-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 'gpiomon')

-e, --edges <edges>: specify the edges to monitor Possible values: 'falling', 'rising', 'both'. (default is 'both')

-E, --event-clock <clock>: specify the source clock for event timestamps Possible values: 'monotonic', 'realtime', 'hte'. (default is 'monotonic') By default 'realtime' is formatted as UTC, others as raw u64.

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

-F, --format <fmt>: specify a custom output format

--idle-timeout <period>: exit gracefully if no events occur for the period specified

-l, --active-low: treat the line as active low, flipping the sense of rising and falling edges

--localtime: format event timestamps as local time

-n, --num-events <num>: exit after processing num events

-p, --debounce-period <period>: debounce the line(s) with the specified period

-q, --quiet: don't generate any output

-I, --initial-state: print initial states of the lines

-N, --numeric: display line values as '0' (inactive) or '1' (active)

-s, --strict: abort if requested line names are not unique

--unquoted: don't quote line or consumer names

--utc: format event timestamps as UTC (default for 'realtime')

-v, --version: output version information and exit

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.

Format specifiers:

%o: GPIO line offset

%l: GPIO line name

%c: GPIO chip name

%e: numeric edge event type ('1' - rising or '2' - falling)

%E: edge event type ('rising' or 'falling')

%S: event timestamp as seconds

%U: event timestamp as UTC

%L: event timestamp as local time

AUTHOR

Bartosz Golaszewski <[email protected]>

REPORTING BUGS

Report bugs to:
Bartosz Golaszewski <[email protected]>
linux-gpio <[email protected]>