Adds WDT support for the nrf54l15

embassy-nrf/Cargo.toml

@@ -88,7 +88,7 @@ nrf5340-app-ns = ["_nrf5340-app", "_ns"]
 ## nRF5340 network core
 nrf5340-net = ["_nrf5340-net"]
 ## nRF54L15 application core in Secure mode
-nrf54l15-app-s = ["_nrf54l15-app", "_s"]
+nrf54l15-app-s = ["_nrf54l15-app", "_s", "_multi_wdt"]
 ## nRF54L15 application core in Non-Secure mode
 nrf54l15-app-ns = ["_nrf54l15-app", "_ns"]
 

embassy-nrf/src/chips/nrf54l15_app.rs

@@ -204,6 +204,11 @@ pub const EASY_DMA_SIZE: usize = (1 << 16) - 1;
 //pub const FLASH_SIZE: usize = 1024 * 1024;
 
 embassy_hal_internal::peripherals! {
+    // WDT
+    WDT0,
+    #[cfg(feature = "_s")]
+    WDT1,
+
     // GPIO port 0
     P0_00,
     P0_01,
@@ -285,6 +290,10 @@ impl_pin!(P2_08, 2, 8);
 impl_pin!(P2_09, 2, 9);
 impl_pin!(P2_10, 2, 10);
 
+impl_wdt!(WDT0, WDT31, WDT31, 0);
+#[cfg(feature = "_s")]
+impl_wdt!(WDT1, WDT30, WDT30, 1);
+
 embassy_hal_internal::interrupt_mod!(
     SWI00,
     SWI01,

embassy-nrf/src/lib.rs

@@ -170,7 +170,6 @@ pub mod uarte;
     feature = "nrf52840"
 ))]
 pub mod usb;
-#[cfg(not(feature = "_nrf54l"))] // TODO
 pub mod wdt;
 
 // This mod MUST go last, so that it sees all the `impl_foo!` macros

embassy-nrf/src/wdt.rs

@@ -37,9 +37,9 @@ impl Config {
     pub fn try_new<T: Instance>(_wdt: &Peri<'_, T>) -> Option<Self> {
         let r = T::REGS;
 
-        #[cfg(not(any(feature = "_nrf91", feature = "_nrf5340")))]
+        #[cfg(not(any(feature = "_nrf91", feature = "_nrf5340", feature = "_nrf54l")))]
         let runstatus = r.runstatus().read().runstatus();
-        #[cfg(any(feature = "_nrf91", feature = "_nrf5340"))]
+        #[cfg(any(feature = "_nrf91", feature = "_nrf5340", feature = "_nrf54l"))]
         let runstatus = r.runstatus().read().runstatuswdt();
 
         if runstatus {
@@ -90,9 +90,9 @@ impl<T: Instance> Watchdog<T> {
         let crv = config.timeout_ticks.max(MIN_TICKS);
         let rren = crate::pac::wdt::regs::Rren((1u32 << N) - 1);
 
-        #[cfg(not(any(feature = "_nrf91", feature = "_nrf5340")))]
+        #[cfg(not(any(feature = "_nrf91", feature = "_nrf5340", feature = "_nrf54l")))]
         let runstatus = r.runstatus().read().runstatus();
-        #[cfg(any(feature = "_nrf91", feature = "_nrf5340"))]
+        #[cfg(any(feature = "_nrf91", feature = "_nrf5340", feature = "_nrf54l"))]
         let runstatus = r.runstatus().read().runstatuswdt();
 
         if runstatus {

examples/nrf54l15/src/bin/wdt.rs

@@ -0,0 +1,41 @@
+#![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 WDT0 is available in non-secure (ns) mode, as WDT1 is
+    // reserved for the secure (s) environment. In secure mode, both WDT0 and WDT1 are available.
+    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");
+    }
+}