Merge pull request #4518 from nerwalt/nrf54l15-wdt

Adds WDT support for the nrf54l15

1 files changed, 42 insertions, 0 deletions

diff --git a/examples/nrf54l15/src/bin/wdt.rs b/examples/nrf54l15/src/bin/wdt.rs
new file mode 100644
index 000000000..9fe37d080
--- /dev/null
+++ b/examples/nrf54l15/src/bin/wdt.rs
@@ -0,0 +1,42 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_nrf::wdt::{Config, HaltConfig, Watchdog};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+    info!("Hello WDT");
+
+    const TIMEOUT_S: u32 = 5;
+
+    let mut config = Config::default();
+    config.timeout_ticks = 32768 * TIMEOUT_S;
+
+    // This is needed for `probe-rs run` to be able to catch the panic message
+    // in the WDT interrupt. The core resets 2 ticks after firing the interrupt.
+    config.action_during_debug_halt = HaltConfig::PAUSE;
+
+    // The nrf54l15 has two watchdogs. Only one (WDT) is available in non-secure (ns) mode, as the
+    // other is reserved for the secure (s) environment. In secure mode, both are available as WDT0
+    // and WDT1.
+    info!("Watchdog launched with {} s timeout", TIMEOUT_S);
+    let (_wdt, [mut handle]) = match Watchdog::try_new(p.WDT1, config) {
+        Ok(x) => x,
+        Err(_) => {
+            info!("Watchdog already active with wrong config, waiting for it to timeout...");
+            loop {}
+        }
+    };
+
+    for wait in 1..=TIMEOUT_S {
+        info!("Waiting {} seconds ...", wait);
+        Timer::after_secs(wait as u64).await;
+        handle.pet();
+        info!("Pet watchdog");
+    }
+}