Struct Line 

pub struct Line { /* private fields */ }

A GPIO line opened on a Linux board, as an output or an input.

It implements the embedded-hal pin traits, so it goes under a Switch, a Contact, or any driver written against them, and Line::drive and Line::read work it directly.

Implementations

impl Line

pub fn chip(&self) -> &Path

The chip the line is on.

Returns

The chip’s device file.

pub fn offset(&self) -> u32

The line’s number on its chip.

Returns

The offset it was opened at.

pub fn drive(&mut self, level: Level) -> Result<(), LineError>

Drives the line to a level. The line must have been opened with output.

Arguments

• level - the level to drive.

Errors

A LineError naming the line when the kernel refuses the write, which is what an input line answers.

pub fn read(&mut self) -> Result<Level, LineError>

Reads the level on the line now.

Returns

The level.

Errors

A LineError naming the line when the kernel refuses the read.

Trait Implementations

impl Debug for Line

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl ErrorType for Line

type Error = LineError

Error type

impl InputPin for Line

fn is_high(&mut self) -> Result<bool, LineError>

Is the input pin high?

fn is_low(&mut self) -> Result<bool, LineError>

Is the input pin low?

impl OutputPin for Line

fn set_low(&mut self) -> Result<(), LineError>

Drives the pin low.

fn set_high(&mut self) -> Result<(), LineError>

Drives the pin high.

fn set_state(&mut self, state: PinState) -> Result<(), Self::Error>

Drives the pin high or low depending on the provided value.