Enum rppal::gpio::Error

pub enum Error {
    UnknownModel,
    PinNotAvailable(u8),
    PermissionDenied(String),
    Io(Error),
    ThreadPanic,
}

Errors that can occur when accessing the GPIO peripheral.

Variants

UnknownModel

Unknown model.

The Raspberry Pi model or SoC can't be identified. Support for new models is usually added shortly after they are officially announced and available to the public. Make sure you're using the latest release of RPPAL.

You may also encounter this error if your Linux distribution doesn't provide any of the common user-accessible system files that are used to identify the model and SoC.

PinNotAvailable(u8)

Pin is not available.

The pin is already in use elsewhere in your application, or the GPIO peripheral doesn't expose a pin with the specified number. If the pin is currently in use, you can retrieve it again after the Pin (or a derived InputPin, OutputPin or IoPin) instance goes out of scope.

PermissionDenied(String)

Permission denied when opening /dev/gpiomem, /dev/mem or /dev/gpiochipN for read/write access.

More information on possible causes for this error can be found here.

Io(Error)

I/O error.

ThreadPanic

Thread panicked.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

fn cause(&self) -> Option<&dyn Error>

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for Error

fn from(err: Error) -> Error

Performs the conversion.

impl From<Error> for Error

fn from(_err: Error) -> Error

Performs the conversion.

impl From<Error> for Error

fn from(err: Error) -> Error

Performs the conversion.