1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106

//! 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 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 write(&mut self, words: &[W]) -> Result<(), Self::Error>;
}

/// Blocking write (iterator version)
#[cfg(feature = "unproven")]
pub trait WriteIter<W> {
    /// Error type
    type Error;

    /// Sends `words` to the slave, ignoring all the incoming words
    fn 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>: ::spi::FullDuplex<W> {}

    impl<W, S> ::blocking::spi::Transfer<W> for S
    where
        S: Default<W>,
        W: Clone,
    {
        type Error = S::Error;

        fn transfer<'w>(&mut self, words: &'w mut [W]) -> Result<&'w [W], S::Error> {
            for word in words.iter_mut() {
                block!(self.send(word.clone()))?;
                *word = block!(self.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>: ::spi::FullDuplex<W> {}

    impl<W, S> ::blocking::spi::Write<W> for S
    where
        S: Default<W>,
        W: Clone,
    {
        type Error = S::Error;

        fn write(&mut self, words: &[W]) -> Result<(), S::Error> {
            for word in words {
                block!(self.send(word.clone()))?;
                block!(self.read())?;
            }

            Ok(())
        }
    }
}

/// Blocking write (iterator version)
#[cfg(feature = "unproven")]
pub mod write_iter {
    /// Default implementation of `blocking::spi::WriteIter<W>` for implementers of
    /// `spi::FullDuplex<W>`
    pub trait Default<W>: ::spi::FullDuplex<W> {}

    impl<W, S> ::blocking::spi::WriteIter<W> for S
    where
        S: Default<W>,
        W: Clone,
    {
        type Error = S::Error;

        fn write_iter<WI>(&mut self, words: WI) -> Result<(), S::Error>
        where
            WI: IntoIterator<Item = W>,
        {
            for word in words.into_iter() {
                block!(self.send(word.clone()))?;
                block!(self.read())?;
            }

            Ok(())
        }
    }
}