Function imxrt_hal::dma::peripheral::write

pub fn write<D, E, 'a>(
    channel: &'a mut Channel,
    buffer: &'a [E],
    destination: &'a mut D
) -> Write<'a, D, E> 
where
    D: Destination<E>,
    E: Element,

Use a DMA channel to send a buffer of data to the destination peripheral.

Consider using a DMA interrupt handler that calls on_interrupt() to wake the executor when the transfer completes. Otherwise, poll the future.

Example

Send five bytes to a LPUART device. Wake the executor when the transfer completes.

use imxrt_dma::{peripheral, channel::Channel};

// #[cortex_m_rt::interrupt]
fn DMA7() {
    // Safety: DMA channel 7 valid and used by a future.
    unsafe { DMA.on_interrupt(7) };
}

let mut lpuart = // A LPUART peripheral
let mut channel_7: Channel = // DMA channel 7

channel_7.set_interrupt_on_completion(true);
// TODO unmask interrupts in NVIC!

let buffer = [4u8, 5, 6, 7, 8];

peripheral::write(
    &mut channel_7,
    &buffer,
    &mut lpuart,
).await?;