examples/src/bin/lpuart_polling.rs


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#![no_std]
#![no_main]

use embassy_executor::Spawner;
use embassy_mcxa_examples::init_uart2_pins;
use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};

use crate::hal::lpuart::{Config, Lpuart};

#[embassy_executor::main]
async fn main(_spawner: Spawner) {
    let p = hal::init(hal::config::Config::default());

    defmt::info!("boot");

    // Board-level init for UART2 clocks and pins.
    unsafe {
        init_uart2_pins();
    }

    // Create UART configuration
    let config = Config {
        baudrate_bps: 115_200,
        enable_tx: true,
        enable_rx: true,
        ..Default::default()
    };

    // Create UART instance using LPUART2 with P2_2 as TX and P2_3 as RX
    let lpuart = Lpuart::new_blocking(
        p.LPUART2, // Peripheral
        p.P2_2,    // TX pin
        p.P2_3,    // RX pin
        config,
    )
    .unwrap();

    // Split into separate TX and RX parts
    let (mut tx, mut rx) = lpuart.split();

    // Write hello messages
    tx.blocking_write(b"Hello world.\r\n").unwrap();
    tx.blocking_write(b"Echoing. Type characters...\r\n").unwrap();

    // Echo loop
    loop {
        let mut buf = [0u8; 1];
        rx.blocking_read(&mut buf).unwrap();
        tx.blocking_write(&buf).unwrap();
    }
}