rp2040: add {tx,rx}-only constructors to UART

This commit is contained in:
Pedro Ferreira 2023-01-04 20:27:07 +01:00
parent bf4c0de16a
commit 6d4c6e0481
2 changed files with 70 additions and 4 deletions

View file

@ -98,7 +98,19 @@ pub struct UartRx<'d, T: Instance, M: Mode> {
} }
impl<'d, T: Instance, M: Mode> UartTx<'d, T, M> { impl<'d, T: Instance, M: Mode> UartTx<'d, T, M> {
fn new(tx_dma: Option<PeripheralRef<'d, AnyChannel>>) -> Self { /// Create a new DMA-enabled UART which can only send data
pub fn new(
_uart: impl Peripheral<P = T> + 'd,
tx: impl Peripheral<P = impl TxPin<T>> + 'd,
tx_dma: impl Peripheral<P = impl Channel> + 'd,
config: Config,
) -> Self {
into_ref!(tx, tx_dma);
Uart::<T, M>::init(Some(tx.map_into()), None, None, None, config);
Self::new_inner(Some(tx_dma.map_into()))
}
fn new_inner(tx_dma: Option<PeripheralRef<'d, AnyChannel>>) -> Self {
Self { Self {
tx_dma, tx_dma,
phantom: PhantomData, phantom: PhantomData,
@ -140,7 +152,19 @@ impl<'d, T: Instance> UartTx<'d, T, Async> {
} }
impl<'d, T: Instance, M: Mode> UartRx<'d, T, M> { impl<'d, T: Instance, M: Mode> UartRx<'d, T, M> {
fn new(rx_dma: Option<PeripheralRef<'d, AnyChannel>>) -> Self { /// Create a new DMA-enabled UART which can only send data
pub fn new(
_uart: impl Peripheral<P = T> + 'd,
rx: impl Peripheral<P = impl RxPin<T>> + 'd,
rx_dma: impl Peripheral<P = impl Channel> + 'd,
config: Config,
) -> Self {
into_ref!(rx, rx_dma);
Uart::<T, M>::init(Some(rx.map_into()), None, None, None, config);
Self::new_inner(Some(rx_dma.map_into()))
}
fn new_inner(rx_dma: Option<PeripheralRef<'d, AnyChannel>>) -> Self {
Self { Self {
rx_dma, rx_dma,
phantom: PhantomData, phantom: PhantomData,
@ -295,8 +319,8 @@ impl<'d, T: Instance, M: Mode> Uart<'d, T, M> {
); );
Self { Self {
tx: UartTx::new(tx_dma), tx: UartTx::new_inner(tx_dma),
rx: UartRx::new(rx_dma), rx: UartRx::new_inner(rx_dma),
} }
} }

View file

@ -0,0 +1,42 @@
//! test TX-only and RX-only UARTs. You need to connect GPIO0 to GPIO5 for
//! this to work
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_rp::peripherals::UART1;
use embassy_rp::uart::{Async, Config, UartRx, UartTx};
use embassy_time::{Duration, Timer};
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut uart_tx = UartTx::new(p.UART0, p.PIN_0, p.DMA_CH0, Config::default());
let uart_rx = UartRx::new(p.UART1, p.PIN_5, p.DMA_CH1, Config::default());
unwrap!(spawner.spawn(reader(uart_rx)));
info!("Writing...");
loop {
let data = [1u8, 2, 3, 4, 5, 6, 7, 8];
info!("TX {:?}", data);
uart_tx.write(&data).await.unwrap();
Timer::after(Duration::from_secs(1)).await;
}
}
#[embassy_executor::task]
async fn reader(mut rx: UartRx<'static, UART1, Async>) {
info!("Reading...");
loop {
// read a total of 4 transmissions (32 / 8) and then print the result
let mut buf = [0; 32];
rx.read(&mut buf).await.unwrap();
info!("RX {:?}", buf);
}
}