From 6d4c6e0481f0738b8306172e7c5d54aa2758b74e Mon Sep 17 00:00:00 2001 From: Pedro Ferreira Date: Wed, 4 Jan 2023 20:27:07 +0100 Subject: rp2040: add {tx,rx}-only constructors to UART --- examples/rp/src/bin/uart_unidir.rs | 42 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 examples/rp/src/bin/uart_unidir.rs (limited to 'examples') diff --git a/examples/rp/src/bin/uart_unidir.rs b/examples/rp/src/bin/uart_unidir.rs new file mode 100644 index 000000000..f56e7009f --- /dev/null +++ b/examples/rp/src/bin/uart_unidir.rs @@ -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); + } +} -- cgit