Enum rppal::spi::Error

pub enum Error {
    Io(Error),
    BitsPerWordNotSupported(u8),
    BitOrderNotSupported(BitOrder),
    ClockSpeedNotSupported(u32),
    ModeNotSupported(Mode),
    PolarityNotSupported(Polarity),
}

Errors that can occur when accessing the SPI peripheral.

Variants

Io(Error)

I/O error.

BitsPerWordNotSupported(u8)

The specified number of bits per word is not supported.

The Raspberry Pi currently only supports 8 bit words. Any other value will trigger this error.

BitOrderNotSupported(BitOrder)

The specified bit order is not supported.

The Raspberry Pi currently only supports the MsbFirst bit order. If you need the LsbFirst bit order, you can use the reverse_bits function instead to reverse the bit order in software by converting your write buffer before sending it to the slave device, and your read buffer after reading any incoming data.

ClockSpeedNotSupported(u32)

The specified clock speed is not supported.

ModeNotSupported(Mode)

The specified mode is not supported.

PolarityNotSupported(Polarity)

The specified Slave Select polarity is not supported.

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.