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#![no_std]
#![no_main]
use embassy_executor::Spawner;
use embassy_mcxa::clocks::config::Div8;
use embassy_mcxa::lpuart::Config;
use embassy_mcxa::lpuart::buffered::BufferedLpuart;
use embassy_mcxa::{bind_interrupts, lpuart};
use embedded_io_async::Write;
use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
// Bind OS_EVENT for timers plus LPUART2 IRQ for the buffered driver
bind_interrupts!(struct Irqs {
LPUART2 => lpuart::buffered::BufferedInterruptHandler::<hal::peripherals::LPUART2>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut cfg = hal::config::Config::default();
cfg.clock_cfg.sirc.fro_12m_enabled = true;
cfg.clock_cfg.sirc.fro_lf_div = Some(Div8::no_div());
let p = hal::init(cfg);
// Configure NVIC for LPUART2
hal::interrupt::LPUART2.configure_for_uart(hal::interrupt::Priority::P3);
// UART configuration (enable both TX and RX)
let config = Config {
baudrate_bps: 115_200,
rx_fifo_watermark: 0,
tx_fifo_watermark: 0,
..Default::default()
};
let mut tx_buf = [0u8; 256];
let mut rx_buf = [0u8; 256];
// Create a buffered LPUART2 instance with both TX and RX
let mut uart = BufferedLpuart::new(
p.LPUART2,
p.P2_2, // TX pin
p.P2_3, // RX pin
Irqs,
&mut tx_buf,
&mut rx_buf,
config,
)
.unwrap();
// Split into TX and RX parts
let (tx, rx) = uart.split_ref();
tx.write(b"Hello buffered LPUART.\r\n").await.unwrap();
tx.write(b"Type characters to echo them back.\r\n").await.unwrap();
// Echo loop
let mut buf = [0u8; 4];
loop {
let used = rx.read(&mut buf).await.unwrap();
tx.write_all(&buf[..used]).await.unwrap();
}
}
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