Struct spidev::Spidev

pub struct Spidev { /* fields omitted */ }

Provide high-level access to Linux Spidev Driver

Methods

impl Spidev

pub fn new(devfile: File) -> Self

Wrap an already opened File for use as an spidev

pub fn open<P: AsRef<Path>>(path: P) -> Result<Spidev>

Open the spidev device with the provided path

Typically, the path will be something like "/dev/spidev0.0" where the first number if the bus and the second number is the chip select on that bus for the device being targeted.

pub fn inner(&self) -> &File

Get a reference to the underlying File object

pub fn into_inner(self) -> File

Consume the object and get the underlying File object

pub fn configure(&mut self, options: &SpidevOptions) -> Result<()>

Write the provided configuration to this device

pub fn transfer(&self, transfer: &mut SpidevTransfer) -> Result<()>

Perform a single transfer

pub fn transfer_multiple(&self, transfers: &mut [SpidevTransfer]) -> Result<()>

Perform multiple transfers in a single system call to the kernel

Chaining together multiple requests like this can reduce latency and be used for conveniently and efficient implementing some protocols without extra round trips back to userspace.

Trait Implementations

impl Write for Spidev

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.

impl Read for Spidev

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

unsafe fn initializer(&self) -> Initializer

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

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.