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#![no_std]
#![no_main]
use embassy_executor::Spawner;
use embassy_mcxa::bind_interrupts;
use embassy_mcxa_examples::init_uart2_pins;
use embassy_time::{Duration, Timer};
use hal::lpuart::{Config, Lpuart};
use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _};
// Bind only OS_EVENT, and retain the symbol explicitly so it can’t be GC’ed.
bind_interrupts!(struct Irqs {
OS_EVENT => hal::ostimer::time_driver::OsEventHandler;
});
#[used]
#[no_mangle]
static KEEP_OS_EVENT: unsafe extern "C" fn() = OS_EVENT;
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = hal::init(hal::config::Config::default());
// 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
unsafe {
init_uart2_pins(hal::pac());
}
let mut uart = Lpuart::new_blocking(
p.LPUART2, // Peripheral
p.P2_2, // TX pin
p.P2_3, // RX pin
config,
)
.unwrap();
uart.blocking_write(b"boot\n").unwrap();
// Avoid mass NVIC writes here; DefaultHandler now safely returns.
// Initialize embassy-time global driver backed by OSTIMER0 (re-enables OS_EVENT with priority)
// The bind_interrupts! macro handles handler binding automatically
// Initialize OSTIMER with default 1MHz frequency
// Adjust this value to match your actual OSTIMER clock frequency
hal::ostimer::time_driver::init(hal::config::Config::default().time_interrupt_priority, 1_000_000);
// Removed force-pend; rely on real hardware match to trigger OS_EVENT.
// Log using defmt if enabled
defmt::info!("OSTIMER async example starting...");
loop {
defmt::info!("tick");
uart.write_str_blocking("tick\n");
Timer::after(Duration::from_millis(1000)).await;
}
}
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