Move examples to a package of their own (#16)

* Move examples to a package of their own

* cargo +nightly fmt

* Add missing safety doc

* cargo clippy examples

* fmt again

---------

Co-authored-by: Felipe Balbi <[email protected]>

1 files changed, 52 insertions, 0 deletions

diff --git a/examples/src/bin/ostimer_async.rs b/examples/src/bin/ostimer_async.rs
new file mode 100644
index 000000000..34862b61f
--- /dev/null
+++ b/examples/src/bin/ostimer_async.rs
@@ -0,0 +1,52 @@
+#![no_std]
+#![no_main]
+
+use embassy_executor::Spawner;
+use embassy_mcxa::bind_interrupts;
+use embassy_mcxa_examples::{init_ostimer0, init_uart2};
+use embassy_time::{Duration, Timer};
+use hal::uart;
+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());
+
+    // Enable/clock OSTIMER0 and UART2 before touching their registers
+    unsafe {
+        init_ostimer0(hal::pac());
+        init_uart2(hal::pac());
+    }
+    let src = unsafe { hal::clocks::uart2_src_hz(hal::pac()) };
+    let uart = uart::Uart::<uart::Lpuart2>::new(_p.LPUART2, uart::Config::new(src));
+    uart.write_str_blocking("boot\n");
+
+    // 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;
+    }
+}