Struct StateMachineRx 

pub struct StateMachineRx<'d, PIO: Instance, const SM: usize> { /* private fields */ }

Type representing a state machine RX FIFO.

Implementations

impl<'d, PIO: Instance, const SM: usize> StateMachineRx<'d, PIO, SM>

pub fn empty(&self) -> bool

Check if RX FIFO is empty.

pub fn full(&self) -> bool

Check if RX FIFO is full.

pub fn level(&self) -> u8

Check RX FIFO level.

pub fn stalled(&self) -> bool

Check if state machine has stalled on full RX FIFO.

pub fn underflowed(&self) -> bool

Check if RX FIFO underflow (i.e. read-on-empty by the system) has occurred.

pub fn pull(&mut self) -> u32

Pull data from RX FIFO.

This function doesn’t check if there is data available to be read. If the rx FIFO is empty, an undefined value is returned. If you only want to pull if data is available, use try_pull instead.

pub fn try_pull(&mut self) -> Option<u32>

Attempt pulling data from RX FIFO.

pub fn wait_pull<'a>(&'a mut self) -> FifoInFuture<'a, 'd, PIO, SM>

Wait for RX FIFO readable.

pub fn dreq(&self) -> TreqSel

Get the Data Request value for the RX FIFO.

This value can be used to configure DMA channel pacing.

pub fn fifo_address(&self) -> *mut u32

Get the address of the RX FIFO.

This address can be used to configure DMA transfers from the FIFO. To manually read a word from the FIFO, use try_pull or pull.

pub fn dma_pull<'a, W: Word>( &'a mut self, ch: &'a mut Channel<'_, Async>, data: &'a mut [W], bswap: bool, ) -> Transfer<'a>

Prepare DMA transfer from RX FIFO.

pub fn dma_pull_discard<'a, W: Word>( &'a mut self, ch: &'a mut Channel<'_, Async>, len: usize, ) -> Transfer<'a>

Prepare a repeated DMA transfer from RX FIFO.