Struct Spi

pub struct Spi<C, A, RxDma = NoneT, TxDma = NoneT>
where
    C: ValidConfig,
    A: Capability,
{ /* private fields */ }

An enabled SPI peripheral that can perform transactions

See the impl_ehal documentation for details on the implementations of the embedded HAL traits, which vary based on Size and Capability.

Implementations

impl<C, A, S> Spi<C, A>

where C: ValidConfig<Sercom = S>, A: Capability, S: Sercom,

pub fn into_future<I>(self, _interrupts: I) -> SpiFuture<C, A>

where C::Word: Copy, u8: AsPrimitive<C::Word>, I: Binding<S::Interrupt, InterruptHandler<S>>,

Turn an Spi into a SpiFuture.

In cases where the underlying Spi is Duplex, reading words need to be accompanied with sending a no-op word. By default it is set to 0x00, but you can configure it using Config::set_nop_word.

impl<C, A, RxDma, TxDma> Spi<C, A, RxDma, TxDma>

where C: ValidConfig, A: Capability,

pub fn reconfigure(&mut self, update: impl FnOnce(&mut SpecificConfig<C>))

Update the SPI configuration.

Calling this method will temporarily disable the SERCOM peripheral, as some registers are enable-protected. This may interrupt any ongoing transactions.

pub fn enable_interrupts(&mut self, flags: Flags)

Enable interrupts for the specified flags

pub fn disable_interrupts(&mut self, flags: Flags)

Disable interrupts for the specified flags

pub fn read_flags(&self) -> Flags

Read the interrupt flags

pub fn clear_flags(&mut self, flags: Flags)

Clear the corresponding interrupt flags

Only the ERROR, SSL and TXC flags can be cleared.

Note: Implementations of flush methods (eg SpiBus::flush) wait on and clear the TXC flag. Manually clearing this flag could cause them to hang indefinitely.

pub fn read_status(&self) -> Status

Read the error status flags

pub fn clear_status(&mut self, status: Status)

Clear the corresponding error status flags

pub fn read_flags_errors(&self) -> Result<Flags, Error>

Try to read the interrupt flags, but first check the error status flags.

pub unsafe fn read_data(&mut self) -> DataWidth

Read from the DATA register

Safety

Reading from the data register directly is unsafe, because it will clear the RXC flag, which could break assumptions made elsewhere in this module.

pub unsafe fn write_data(&mut self, data: DataWidth)

Write to the DATA register

Safety

Writing to the data register directly is unsafe, because it will clear the DRE flag, which could break assumptions made elsewhere in this module.

pub fn disable(self) -> C

Disable the SPI peripheral and return the Config struct

impl<C, D> Spi<C, D>

where C: ValidConfig, D: Receive, C::OpMode: MasterMode,

pub fn with_dma_channels<R, T>(self, rx: R, tx: T) -> Spi<C, D, R, T>

where R: AnyChannel<Status = Ready>, T: AnyChannel<Status = Ready>,

Attach RX and TX DMA channels to this Spi. Its SpiBus implementation will use DMA to carry out its transactions. In Master mode, since even read SPI transaction necessarily involve a write to shift data in, Rx-only must take two DMA channels, just the same as if it were Duplex.

impl<C> Spi<C, Duplex>

where C: ValidConfig<OpMode = Slave>,

pub fn with_dma_channels_slave<R, T>(self, rx: R, tx: T) -> Spi<C, Duplex, R, T>

where R: AnyChannel<Status = Ready>, T: AnyChannel<Status = Ready>,

Attach a DMA channel to this Spi. Its SpiBus implementation will use DMA to carry out its transactions. In Slave mode, a Duplex Spi needs two DMA channels.

impl<C, T> Spi<C, Rx, NoneT, T>

where C: ValidConfig<OpMode = Slave>,

pub fn with_rx_channel<R>(self, rx: R) -> Spi<C, Rx, R, T>

where R: AnyChannel<Status = Ready>,

Attach a DMA channel to this Spi. Its SpiBus implementation will use DMA to carry out its transactions. In Slave mode, a Rx Spi only needs a single DMA channel.

impl<C, R> Spi<C, Tx, R, NoneT>

where C: ValidConfig,

pub fn with_tx_channel<T>(self, tx: T) -> Spi<C, Tx, R, T>

where T: AnyChannel<Status = Ready>,

Attach a DMA channel to this Spi. Its SpiBus implementation will use DMA to carry out its transactions. For Tx Spis, only a single DMA channel is necessary.

impl<C, D, R, T> Spi<C, D, R, T>

where C: ValidConfig, D: Capability,

pub fn take_dma_channels(self) -> (Spi<C, D, NoneT, NoneT>, R, T)

where R: AnyChannel<Status: ReadyChannel>, T: AnyChannel<Status: ReadyChannel>,

Reclaim both RX and TX DMA channels. Any subsequent SPI transaction will not use DMA.

pub fn take_rx_channel(self) -> (Spi<C, D, NoneT, T>, R)

where R: AnyChannel<Status: ReadyChannel>,

Reclaim the RX DMA channel. Any subsequent SPI RX transaction will not use DMA.

pub fn take_tx_channel(self) -> (Spi<C, D, R, NoneT>, T)

where T: AnyChannel<Status: ReadyChannel>,

Reclaim the TX DMA channel. Any subsequent SPI TX transaction will not use DMA.

impl<C: ValidConfig, R, T> Spi<C, Tx, R, T>

pub fn into_panic_on_write(self) -> PanicOnWrite<Self>

Turn a Tx Spi into a PanicOnWrite

impl<C: ValidConfig, R, T> Spi<C, Tx, R, T>

pub fn into_panic_on_read(self) -> PanicOnRead<Self>

Turn a Rx Spi into a PanicOnRead

impl<C: ValidConfig, R, T> Spi<C, Tx, R, T>

pub fn get_dyn_length(&self) -> u8

This method is not present with the selected feature set, defined for documentation only

Trait Implementations

impl<C, A> AnySpi for Spi<C, A>

where C: ValidConfig, A: Capability,

type Sercom = <C as AnyConfig>::Sercom

type Pads = <C as AnyConfig>::Pads

type Capability = A

type OpMode = <C as AnyConfig>::OpMode

type Size = <C as AnyConfig>::Size

type Word = <C as AnyConfig>::Word

type Config = C

impl<C, A> AsMut<Spi<C, A>> for Spi<C, A>

where C: ValidConfig, A: Capability,

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

Converts this type into a mutable reference of the (usually inferred) input type.

impl<C, A, R, T> AsMut<Spi<C, A, R, T>> for SpiFuture<C, A, R, T>

where C: ValidConfig, A: Capability,

fn as_mut(&mut self) -> &mut Spi<C, A, R, T>

Converts this type into a mutable reference of the (usually inferred) input type.

impl<C: ValidConfig, R, T> AsMut<Spi<C, Rx, R, T>> for PanicOnWrite<Spi<C, Rx, R, T>>

fn as_mut(&mut self) -> &mut Spi<C, Rx, R, T>

Converts this type into a mutable reference of the (usually inferred) input type.

impl<C: ValidConfig, R, T> AsMut<Spi<C, Tx, R, T>> for PanicOnRead<Spi<C, Tx, R, T>>

fn as_mut(&mut self) -> &mut Spi<C, Tx, R, T>

Converts this type into a mutable reference of the (usually inferred) input type.

impl<C, A> AsRef<Config<<C as AnyConfig>::Pads, <C as AnyConfig>::OpMode, <C as AnyConfig>::Size>> for Spi<C, A>

where C: ValidConfig, A: Capability,

Get a shared reference to the underlying Config struct

This can be used to call the various get_* functions on Config

fn as_ref(&self) -> &SpecificConfig<C>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C, A> AsRef<Spi<C, A>> for Spi<C, A>

where C: ValidConfig, A: Capability,

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl<C, A, R, T> AsRef<Spi<C, A, R, T>> for SpiFuture<C, A, R, T>

where C: ValidConfig, A: Capability,

fn as_ref(&self) -> &Spi<C, A, R, T>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C: ValidConfig, R, T> AsRef<Spi<C, Rx, R, T>> for PanicOnWrite<Spi<C, Rx, R, T>>

fn as_ref(&self) -> &Spi<C, Rx, R, T>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C: ValidConfig, R, T> AsRef<Spi<C, Tx, R, T>> for PanicOnRead<Spi<C, Tx, R, T>>

fn as_ref(&self) -> &Spi<C, Tx, R, T>

Converts this type into a shared reference of the (usually inferred) input type.

impl<C, D, R, T> ErrorType for Spi<C, D, R, T>

where C: ValidConfig, D: Capability,

type Error = Error

Error type.

impl<C, D, R, T> ErrorType for Spi<C, D, R, T>

where C: ValidConfig, D: Capability,

type Error = Error

Error type of all the IO operations on this type.

impl<C, D, R, T> ErrorType for Spi<C, D, R, T>

where C: ValidConfig, D: Capability,

type Error = Error

Error type

impl<C: ValidConfig, R, T> From<PanicOnRead<Spi<C, Tx, R, T>>> for Spi<C, Tx, R, T>

fn from(value: PanicOnRead<Spi<C, Tx, R, T>>) -> Self

Converts to this type from the input type.

impl<C: ValidConfig, R, T> From<PanicOnWrite<Spi<C, Rx, R, T>>> for Spi<C, Rx, R, T>

fn from(value: PanicOnWrite<Spi<C, Rx, R, T>>) -> Self

Converts to this type from the input type.

impl<C> FullDuplex<<C as AnyConfig>::Word> for Spi<C, Duplex>

where C: ValidConfig, C::Word: PrimInt + AsPrimitive<u16>, u16: AsPrimitive<C::Word>,

Implement embedded-hal-nb spi::FullDuplex for Spi structs with AtomicSize

spi::FullDuplex is only implemented when the Spi struct has Duplex Capability. The Word size used in the implementation depends on the corresponding CharSize.

fn read(&mut self) -> Result<C::Word, Error>

Reads the word stored in the shift register

fn write(&mut self, word: C::Word) -> Result<(), Self::Error>

Writes a word to the slave

impl<P, M, C> Read<<C as CharSize>::Word> for Spi<Config<P, M, C>, Rx>

where Config<P, M, C>: ValidConfig, P: ValidPads, M: MasterMode, C: CharSize, C::Word: PrimInt, DataWidth: AsPrimitive<C::Word>,

Implement Read for Rx Spi structs in a MasterMode

Read is only implemented for Spi structs with Rx Capability. In a MasterMode, Read has to initiate transactions, so it keeps track of the transaction state. If a transaction is in progress, it will wait on RXC. If not, it will wait on DRE, and then send 0.

fn read(&mut self) -> Result<C::Word, Error>

Reads a single word from the serial interface

impl<P, C> Read<<C as CharSize>::Word> for Spi<Config<P, Slave, C>, Rx>

where Config<P, Slave, C>: ValidConfig, P: ValidPads, C: CharSize, C::Word: PrimInt, DataWidth: AsPrimitive<C::Word>,

Implement Read for Rx Spi structs in Slave OpMode

Read is only implemented for Spi structs with Rx Capability. In Slave OpMode, Read does not have to initiate transactions, so it does not have to store any internal state. It only has to wait on RXC.

fn read(&mut self) -> Result<C::Word, Error>

Wait for an RXC flag, then read the word

impl<P, M> Read for Spi<Config<P, M, EightBit>, Rx>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: MasterMode,

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

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

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

Read the exact number of bytes required to fill buf.

impl<P, M, Z, D, R, T, S> Read for Spi<Config<P, M, Z>, D, R, T>

where P: ValidPads, M: MasterMode, Z: Size<Word = u8> + 'static, Config<P, M, Z>: ValidConfig<Sercom = S>, D: Receive, S: Sercom, R: AnyChannel<Status = Ready>, T: AnyChannel<Status = Ready>,

embedded_io::Read implementation for Receive Spis in MasterMode, using DMA transfers.

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

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

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

Read the exact number of bytes required to fill buf.

impl<P> Read for Spi<Config<P, Slave, EightBit>, Rx>

where Config<P, Slave, EightBit>: ValidConfig, P: ValidPads,

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

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

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

Read the exact number of bytes required to fill buf.

impl<P, Z, D, R, T, S> Read for Spi<Config<P, Slave, Z>, D, R, T>

where P: ValidPads, Z: Size<Word = u8> + 'static, Config<P, Slave, Z>: ValidConfig<Sercom = S>, D: Receive, S: Sercom, R: AnyChannel<Status = Ready>,

embedded_io::Read implementation for Receive Spis in Slave mode, using DMA transfers.

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

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

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

Read the exact number of bytes required to fill buf.

impl<P, M, C> SpiBus<<C as CharSize>::Word> for Spi<Config<P, M, C>, Duplex>

where Config<P, M, C>: ValidConfig, P: ValidPads, M: MasterMode, C: Size + 'static, C::Word: PrimInt + AsPrimitive<DataWidth> + Copy, DataWidth: AsPrimitive<C::Word>,

SpiBus implementation for Spi, using word-by-word transfers.

fn read(&mut self, words: &mut [Word<C>]) -> Result<(), Self::Error>

Read words from the slave.

fn write(&mut self, words: &[Word<C>]) -> Result<(), Self::Error>

Write words to the slave, ignoring all the incoming words.

fn transfer( &mut self, read: &mut [Word<C>], write: &[Word<C>], ) -> Result<(), Self::Error>

Write and read simultaneously. write is written to the slave on MOSI and words received on MISO are stored in read.

fn transfer_in_place( &mut self, words: &mut [Word<C>], ) -> Result<(), Self::Error>

Write and read simultaneously. The contents of words are written to the slave, and the received words are stored into the same words buffer, overwriting it.

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

Wait until all operations have completed and the bus is idle.

impl<P, M, S, C, R, T> SpiBus<<C as CharSize>::Word> for Spi<Config<P, M, C>, Duplex, R, T>

where Config<P, M, C>: ValidConfig<Sercom = S>, S: Sercom, P: ValidPads, M: MasterMode, C: Size + 'static, C::Word: PrimInt + AsPrimitive<DataWidth> + Beat, DataWidth: AsPrimitive<C::Word>, R: AnyChannel<Status = Ready>, T: AnyChannel<Status = Ready>,

SpiBus implementation for Spi, using DMA transfers.

fn read(&mut self, words: &mut [C::Word]) -> Result<(), Self::Error>

Read words from the slave.

fn write(&mut self, words: &[C::Word]) -> Result<(), Self::Error>

Write words to the slave, ignoring all the incoming words.

fn transfer( &mut self, read: &mut [C::Word], write: &[C::Word], ) -> Result<(), Self::Error>

Write and read simultaneously. write is written to the slave on MOSI and words received on MISO are stored in read.

fn transfer_in_place( &mut self, words: &mut [C::Word], ) -> Result<(), Self::Error>

Write and read simultaneously. The contents of words are written to the slave, and the received words are stored into the same words buffer, overwriting it.

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

Wait until all operations have completed and the bus is idle.

impl<P, M, C> Write<<C as CharSize>::Word> for Spi<Config<P, M, C>, Tx>

where Config<P, M, C>: ValidConfig, P: ValidPads, M: OpMode, C: CharSize, C::Word: PrimInt + AsPrimitive<DataWidth>,

Implement Write for Tx Spi structs

Write is only implemented for Spi structs with Tx Capability. Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

fn write(&mut self, word: C::Word) -> Result<(), Error>

Writes a single word to the serial interface.

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

Ensures that none of the previously written words are still buffered.

impl<P, M> Write for Spi<Config<P, M, EightBit>, Tx>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode,

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

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

fn flush(&mut self) -> Result<(), Self::Error>

Flush this output stream, blocking until all intermediately buffered contents reach their destination.

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

Write an entire buffer into this writer.

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

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

impl<P, M, Z, D, R, T, S> Write for Spi<Config<P, M, Z>, D, R, T>

where P: ValidPads, M: OpMode, Z: Size<Word = u8> + 'static, Config<P, M, Z>: ValidConfig<Sercom = S>, D: Transmit, S: Sercom, T: AnyChannel<Status = Ready>,

embedded_io::Write implementation for Transmit Spis in either Slave or MasterMode, using DMA transfers.

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

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

fn flush(&mut self) -> Result<(), Self::Error>

Flush this output stream, blocking until all intermediately buffered contents reach their destination.

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

Write an entire buffer into this writer.

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

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

impl<P, M> WriteIter<<EightBit as CharSize>::Word> for Spi<Config<P, M, EightBit>, Duplex>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement WriteIter for Spi structs with Duplex Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn write_iter<WI>(&mut self, words: WI) -> Result<(), Error>

where WI: IntoIterator<Item = Word<EightBit>>,

Sends words to the slave, ignoring all the incoming words

impl<P, M> WriteIter<<EightBit as CharSize>::Word> for Spi<Config<P, M, EightBit>, Tx>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement WriteIter for Spi structs with Tx Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

type Error = Error

Error type

fn write_iter<WI>(&mut self, words: WI) -> Result<(), Error>

where WI: IntoIterator<Item = Word<EightBit>>,

Sends words to the slave, ignoring all the incoming words

impl<P, M> WriteIter<<NineBit as CharSize>::Word> for Spi<Config<P, M, NineBit>, Duplex>

where Config<P, M, NineBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement WriteIter for Spi structs with Duplex Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn write_iter<WI>(&mut self, words: WI) -> Result<(), Error>

where WI: IntoIterator<Item = Word<NineBit>>,

Sends words to the slave, ignoring all the incoming words

impl<P, M> WriteIter<<NineBit as CharSize>::Word> for Spi<Config<P, M, NineBit>, Tx>

where Config<P, M, NineBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement WriteIter for Spi structs with Tx Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

type Error = Error

Error type

fn write_iter<WI>(&mut self, words: WI) -> Result<(), Error>

where WI: IntoIterator<Item = Word<NineBit>>,

Sends words to the slave, ignoring all the incoming words

impl<P, M, A> Transfer<<EightBit as CharSize>::Word> for Spi<Config<P, M, EightBit>, A>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode, A: Receive,

Implement Transfer for Spi structs that can Receive

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn transfer<'w>( &mut self, words: &'w mut [Word<EightBit>], ) -> Result<&'w [Word<EightBit>], Error>

Sends words to the slave. Returns the words received from the slave

impl<P, M, A> Transfer<<NineBit as CharSize>::Word> for Spi<Config<P, M, NineBit>, A>

where Config<P, M, NineBit>: ValidConfig, P: ValidPads, M: OpMode, A: Receive,

Implement Transfer for Spi structs that can Receive

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn transfer<'w>( &mut self, words: &'w mut [Word<NineBit>], ) -> Result<&'w [Word<NineBit>], Error>

Sends words to the slave. Returns the words received from the slave

impl<P, M> Write<<EightBit as CharSize>::Word> for Spi<Config<P, M, EightBit>, Duplex>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement Write for Spi structs with Duplex Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn write(&mut self, words: &[Word<EightBit>]) -> Result<(), Error>

Sends words to the slave, ignoring all the incoming words

impl<P, M> Write<<EightBit as CharSize>::Word> for Spi<Config<P, M, EightBit>, Tx>

where Config<P, M, EightBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement Write for Spi structs with Tx Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

type Error = Error

Error type

fn write(&mut self, words: &[Word<EightBit>]) -> Result<(), Error>

Sends words to the slave, ignoring all the incoming words

impl<P, M> Write<<NineBit as CharSize>::Word> for Spi<Config<P, M, NineBit>, Duplex>

where Config<P, M, NineBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement Write for Spi structs with Duplex Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

type Error = Error

Error type

fn write(&mut self, words: &[Word<NineBit>]) -> Result<(), Error>

Sends words to the slave, ignoring all the incoming words

impl<P, M> Write<<NineBit as CharSize>::Word> for Spi<Config<P, M, NineBit>, Tx>

where Config<P, M, NineBit>: ValidConfig, P: ValidPads, M: OpMode,

Implement Write for Spi structs with Tx Capability

The transfer accepts a slice of primitive integers, depending on the CharSize (u8 or u16).

Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

type Error = Error

Error type

fn write(&mut self, words: &[Word<NineBit>]) -> Result<(), Error>

Sends words to the slave, ignoring all the incoming words

impl<P, M, C> Read<<C as CharSize>::Word> for Spi<Config<P, M, C>, Rx>

where Config<P, M, C>: ValidConfig, P: ValidPads, M: MasterMode, C: CharSize, C::Word: PrimInt, DataWidth: AsPrimitive<C::Word>,

Implement serial::Read for Rx Spi structs in a MasterMode

Read is only implemented for Spi structs with Rx Capability. In a MasterMode, Read has to initiate transactions, so it keeps track of the transaction state. If a transaction is in progress, it will wait on RXC. If not, it will wait on DRE, and then send 0.

type Error = Error

Read error

fn read(&mut self) -> Result<C::Word, Error>

Reads a single word from the serial interface

impl<P, C> Read<<C as CharSize>::Word> for Spi<Config<P, Slave, C>, Rx>

where Config<P, Slave, C>: ValidConfig, P: ValidPads, C: CharSize, C::Word: PrimInt, DataWidth: AsPrimitive<C::Word>,

Implement serial::Read for Rx Spi structs in Slave OpMode

serial::Read is only implemented for Spi structs with Rx Capability. In Slave OpMode, Read does not have to initiate transactions, so it does not have to store any internal state. It only has to wait on RXC.

fn read(&mut self) -> Result<C::Word, Error>

Wait for an RXC flag, then read the word

type Error = Error

Read error

impl<P, M, C> Write<<C as CharSize>::Word> for Spi<Config<P, M, C>, Tx>

where Config<P, M, C>: ValidConfig, P: ValidPads, M: OpMode, C: CharSize, C::Word: PrimInt + AsPrimitive<DataWidth>,

Implement serial::Write for Tx Spi structs

serial::Write is only implemented for Spi structs with Tx Capability. Because the Capability is Tx, this implementation never reads the DATA register and ignores all buffer overflow errors.

type Error = Error

Write error

fn write(&mut self, word: C::Word) -> Result<(), Error>

Writes a single word to the serial interface

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

Ensures that none of the previously written words are still buffered

impl<C> FullDuplex<<C as AnyConfig>::Word> for Spi<C, Duplex>

where C: ValidConfig, C::Word: PrimInt + AsPrimitive<u16>, u16: AsPrimitive<C::Word>,

Implement embedded-hal 0.2 spi::FullDuplex for Spi structs with AtomicSize

spi::FullDuplex is only implemented when the Spi struct has Duplex Capability. The Word size used in the implementation depends on the corresponding CharSize.

type Error = Error

An enumeration of SPI errors

fn read(&mut self) -> Result<C::Word, Error>

Reads the word stored in the shift register

fn send(&mut self, word: C::Word) -> Result<(), Error>

Sends a word to the slave

impl<C> Default<<C as AnyConfig>::Word> for Spi<C, Tx>

where C: ValidConfig, Spi<C, Tx>: Write<C::Word>,