embassy/tests/rp/src/bin/uart_dma.rs

33 lines
851 B
Rust

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::{assert_eq, *};
use embassy_executor::Spawner;
use embassy_rp::uart::{Config, Uart};
use {defmt_rtt as _, panic_probe as _};
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_rp::init(Default::default());
info!("Hello World!");
let (tx, rx, uart) = (p.PIN_0, p.PIN_1, p.UART0);
let config = Config::default();
let mut uart = Uart::new(uart, tx, rx, p.DMA_CH0, p.DMA_CH1, config);
// We can't send too many bytes, they have to fit in the FIFO.
// This is because we aren't sending+receiving at the same time.
let data = [0xC0, 0xDE];
uart.write(&data).await.unwrap();
let mut buf = [0; 2];
uart.read(&mut buf).await.unwrap();
assert_eq!(buf, data);
info!("Test OK");
cortex_m::asm::bkpt();
}