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spi.rs
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spi.rs
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//! Blocking SPI API
/// Blocking transfer
pub trait Transfer<W> {
/// Error type
type Error;
/// Sends `words` to the slave. Returns the `words` received from the slave
fn try_transfer<'w>(&mut self, words: &'w mut [W]) -> Result<&'w [W], Self::Error>;
}
/// Blocking write
pub trait Write<W> {
/// Error type
type Error;
/// Sends `words` to the slave, ignoring all the incoming words
fn try_write(&mut self, words: &[W]) -> Result<(), Self::Error>;
}
/// Blocking write (iterator version)
pub trait WriteIter<W> {
/// Error type
type Error;
/// Sends `words` to the slave, ignoring all the incoming words
fn try_write_iter<WI>(&mut self, words: WI) -> Result<(), Self::Error>
where
WI: IntoIterator<Item = W>;
}
/// Blocking transfer
pub mod transfer {
/// Default implementation of `blocking::spi::Transfer<W>` for implementers of
/// `spi::FullDuplex<W>`
pub trait Default<W>: crate::spi::FullDuplex<W> {}
impl<W, S> crate::blocking::spi::Transfer<W> for S
where
S: Default<W>,
W: Clone,
{
type Error = S::Error;
fn try_transfer<'w>(&mut self, words: &'w mut [W]) -> Result<&'w [W], S::Error> {
for word in words.iter_mut() {
block!(self.try_send(word.clone()))?;
*word = block!(self.try_read())?;
}
Ok(words)
}
}
}
/// Blocking write
pub mod write {
/// Default implementation of `blocking::spi::Write<W>` for implementers of `spi::FullDuplex<W>`
pub trait Default<W>: crate::spi::FullDuplex<W> {}
impl<W, S> crate::blocking::spi::Write<W> for S
where
S: Default<W>,
W: Clone,
{
type Error = S::Error;
fn try_write(&mut self, words: &[W]) -> Result<(), S::Error> {
for word in words {
block!(self.try_send(word.clone()))?;
block!(self.try_read())?;
}
Ok(())
}
}
}
/// Blocking write (iterator version)
pub mod write_iter {
/// Default implementation of `blocking::spi::WriteIter<W>` for implementers of
/// `spi::FullDuplex<W>`
pub trait Default<W>: crate::spi::FullDuplex<W> {}
impl<W, S> crate::blocking::spi::WriteIter<W> for S
where
S: Default<W>,
W: Clone,
{
type Error = S::Error;
fn try_write_iter<WI>(&mut self, words: WI) -> Result<(), S::Error>
where
WI: IntoIterator<Item = W>,
{
for word in words.into_iter() {
block!(self.try_send(word.clone()))?;
block!(self.try_read())?;
}
Ok(())
}
}
}