GPIO line definitions

group line_defs

These defines are used across the API.

Enums

enum gpiod_line_value

Logical line state.

Values:

enumerator GPIOD_LINE_VALUE_ERROR: Returned to indicate an error when reading the value.

enumerator GPIOD_LINE_VALUE_INACTIVE: Line is logically inactive.

enumerator GPIOD_LINE_VALUE_ACTIVE: Line is logically active.

enum gpiod_line_direction

Direction settings.

Values:

enumerator GPIOD_LINE_DIRECTION_AS_IS: Request the line(s), but don’t change direction.

enumerator GPIOD_LINE_DIRECTION_INPUT: Direction is input - for reading the value of an externally driven GPIO line.

enumerator GPIOD_LINE_DIRECTION_OUTPUT: Direction is output - for driving the GPIO line.

enum gpiod_line_edge

Edge detection settings.

Values:

enumerator GPIOD_LINE_EDGE_NONE: Line edge detection is disabled.

enumerator GPIOD_LINE_EDGE_RISING: Line detects rising edge events.

enumerator GPIOD_LINE_EDGE_FALLING: Line detects falling edge events.

enumerator GPIOD_LINE_EDGE_BOTH: Line detects both rising and falling edge events.

enum gpiod_line_bias

Internal bias settings.

Values:

enumerator GPIOD_LINE_BIAS_AS_IS: Don’t change the bias setting when applying line config.

enumerator GPIOD_LINE_BIAS_UNKNOWN: The internal bias state is unknown.

enumerator GPIOD_LINE_BIAS_DISABLED: The internal bias is disabled.

enumerator GPIOD_LINE_BIAS_PULL_UP: The internal pull-up bias is enabled.

enumerator GPIOD_LINE_BIAS_PULL_DOWN: The internal pull-down bias is enabled.

enum gpiod_line_drive

Drive settings.

Values:

enumerator GPIOD_LINE_DRIVE_PUSH_PULL: Drive setting is push-pull.

enumerator GPIOD_LINE_DRIVE_OPEN_DRAIN: Line output is open-drain.

enumerator GPIOD_LINE_DRIVE_OPEN_SOURCE: Line output is open-source.

enum gpiod_line_clock

Clock settings.

Values:

enumerator GPIOD_LINE_CLOCK_MONOTONIC: Line uses the monotonic clock for edge event timestamps.

enumerator GPIOD_LINE_CLOCK_REALTIME: Line uses the realtime clock for edge event timestamps.

enumerator GPIOD_LINE_CLOCK_HTE: Line uses the hardware timestamp engine for event timestamps.