embassy-rp: add multicore test for SpinlockRawMutex

ci.sh

@@ -338,6 +338,7 @@ rm out/tests/stm32u5a5zj/usart
 # As of 2025-02-17 these tests work when run from flash
 rm out/tests/pimoroni-pico-plus-2/multicore
 rm out/tests/pimoroni-pico-plus-2/gpio_multicore
+rm out/tests/pimoroni-pico-plus-2/spinlock_mutex_multicore
 # Doesn't work when run from ram on the 2350
 rm out/tests/pimoroni-pico-plus-2/flash
 # This test passes locally but fails on the HIL, no idea why

tests/rp/src/bin/spinlock_mutex_multicore.rs

@@ -0,0 +1,54 @@
+#![no_std]
+#![no_main]
+#[cfg(feature = "rp2040")]
+teleprobe_meta::target!(b"rpi-pico");
+#[cfg(feature = "rp235xb")]
+teleprobe_meta::target!(b"pimoroni-pico-plus-2");
+
+use defmt::{info, unwrap};
+use embassy_executor::Executor;
+use embassy_rp::multicore::{spawn_core1, Stack};
+use embassy_rp::spinlock_mutex::SpinlockRawMutex;
+use embassy_sync::channel::Channel;
+use static_cell::StaticCell;
+use {defmt_rtt as _, panic_probe as _};
+
+static mut CORE1_STACK: Stack<1024> = Stack::new();
+static EXECUTOR0: StaticCell<Executor> = StaticCell::new();
+static EXECUTOR1: StaticCell<Executor> = StaticCell::new();
+static CHANNEL0: Channel<SpinlockRawMutex<0>, bool, 1> = Channel::new();
+static CHANNEL1: Channel<SpinlockRawMutex<1>, bool, 1> = Channel::new();
+
+#[cortex_m_rt::entry]
+fn main() -> ! {
+    let p = embassy_rp::init(Default::default());
+    spawn_core1(
+        p.CORE1,
+        unsafe { &mut *core::ptr::addr_of_mut!(CORE1_STACK) },
+        move || {
+            let executor1 = EXECUTOR1.init(Executor::new());
+            executor1.run(|spawner| unwrap!(spawner.spawn(core1_task())));
+        },
+    );
+    let executor0 = EXECUTOR0.init(Executor::new());
+    executor0.run(|spawner| unwrap!(spawner.spawn(core0_task())));
+}
+
+#[embassy_executor::task]
+async fn core0_task() {
+    info!("CORE0 is running");
+    let ping = true;
+    CHANNEL0.send(ping).await;
+    let pong = CHANNEL1.receive().await;
+    assert_eq!(ping, pong);
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}
+
+#[embassy_executor::task]
+async fn core1_task() {
+    info!("CORE1 is running");
+    let ping = CHANNEL0.receive().await;
+    CHANNEL1.send(ping).await;
+}