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//! This example shows how to use UART (Universal asynchronous receiver-transmitter) in the RP235x chip.
//!
//! Test TX-only and RX-only on two different UARTs. You need to connect GPIO0 to GPIO5 for
//! this to work
//! The Raspberry Pi Debug Probe (https://www.raspberrypi.com/products/debug-probe/) could be used
//! with its UART port.
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Spawner;
use embassy_rp::bind_interrupts;
use embassy_rp::peripherals::UART1;
use embassy_rp::uart::{Async, Config, InterruptHandler, UartRx, UartTx};
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};
bind_interrupts!(struct Irqs {
UART1_IRQ => InterruptHandler<UART1>;
});
#[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, Irqs, 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_secs(1).await;
}
}
#[embassy_executor::task]
async fn reader(mut rx: UartRx<'static, 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);
}
}
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