Struct rppal::gpio::Gpio

pub struct Gpio { /* fields omitted */ }

Provides access to the Raspberry Pi's GPIO peripheral.

Methods

impl Gpio

pub fn new() -> Result<Gpio>

Constructs a new Gpio.

pub fn get(&self, pin: u8) -> Result<Pin>

Returns a Pin for the specified BCM GPIO pin number.

Retrieving a GPIO pin grants access to the pin through an owned Pin instance. If the pin is already in use, or the GPIO peripheral doesn't expose a pin with the specified number, get returns Err(Error::PinNotAvailable). After a Pin (or a derived InputPin, OutputPin or IoPin) goes out of scope, it can be retrieved again through another get call.

pub fn poll_interrupts<'a>(
    &self,
    pins: &[&'a InputPin],
    reset: bool,
    timeout: Option<Duration>
) -> Result<Option<(&'a InputPin, Level)>>

Blocks until an interrupt is triggered on any of the specified pins, or until a timeout occurs.

Only pins that have been previously configured for synchronous interrupts using InputPin::set_interrupt can be polled. Asynchronous interrupt triggers are automatically polled on a separate thread.

Calling poll_interrupts blocks any other calls to poll_interrupts or InputPin::poll_interrupt until it returns. If you need to poll multiple pins simultaneously on different threads, consider using asynchronous interrupts with InputPin::set_async_interrupt instead.

Setting reset to false returns any cached interrupt trigger events if available. Setting reset to true clears all cached events before polling for new events.

The timeout duration indicates how long the call to poll_interrupts will block while waiting for interrupt trigger events, after which an Ok(None) is returned. timeout can be set to None to wait indefinitely.

When an interrupt event is triggered, poll_interrupts returns Ok((&InputPin,Level)) containing the corresponding pin and logic level. If multiple events trigger at the same time, only the first one is returned. The remaining events are cached and will be returned the next time InputPin::poll_interrupt or poll_interrupts is called.

Trait Implementations

impl Clone for Gpio

fn clone(&self) -> Gpio

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Gpio

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

Formats the value using the given formatter.