Enum rppal::gpio::Error

pub enum Error {
    UnknownModel,
    PinUsed(u8),
    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.

PinUsed(u8)

Pin is already in use.

The pin is already in use elsewhere in your application. If the pin is currently in use, you may retrieve it again after the Pin (or a derived InputPin, OutputPin or IoPin) instance goes out of scope.

PinNotAvailable(u8)

Pin is not available.

The GPIO peripheral doesn’t expose a GPIO pin with the specified number. Pins are addressed by their BCM GPIO numbers, rather than their physical location on the GPIO header.

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 description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type based access to context intended for error reports.

impl From<Error> for Error

fn from(err: Error) -> Error

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: Error) -> Error

Converts to this type from the input type.

impl From<Error> for Error

fn from(_err: Error) -> Error

Converts to this type from the input type.