Multicore support

Cargo.toml

@@ -12,6 +12,8 @@ defmt = "0.3"
 defmt-rtt = "0.3"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
 
-embassy-executor = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy", features = ["defmt", "integrated-timers"] }
+embassy-executor = { version = "0.2.0", git = "https://github.com/embassy-rs/embassy", features = ["defmt", "integrated-timers", "nightly", "arch-cortex-m", "executor-thread", "executor-interrupt"] }
 embassy-time = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy", features = ["defmt", "defmt-timestamp-uptime"] }
 embassy-rp = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy", features = ["defmt", "unstable-traits", "nightly", "unstable-pac", "time-driver"] }
+embassy-sync = { version = "0.2.0", git = "https://github.com/embassy-rs/embassy", features = ["defmt"] }
+static_cell = { version = "1.1", features = ["nightly"]}

src/main.rs

@@ -3,38 +3,59 @@
 #![feature(type_alias_impl_trait)]
 
 use defmt::*;
+use embassy_executor::Executor;
 use embassy_executor::Spawner;
-use embassy_rp::gpio;
+use embassy_rp::gpio::{Level, Output};
+use embassy_rp::multicore::{spawn_core1, Stack};
+use embassy_rp::peripherals::PIN_25;
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+use embassy_sync::channel::Channel;
 use embassy_time::{Duration, Timer};
-use gpio::{Level, Output};
+use static_cell::StaticCell;
 use {defmt_rtt as _, panic_probe as _};
 
-#[embassy_executor::main]
-async fn main(_spawner: Spawner) {
-    // Initialise Peripherals
+static mut CORE1_STACK: Stack<4096> = Stack::new();
+static EXECUTOR0: StaticCell<Executor> = StaticCell::new();
+static EXECUTOR1: StaticCell<Executor> = StaticCell::new();
+static CHANNEL: Channel<CriticalSectionRawMutex, LedState, 1> = Channel::new();
+
+enum LedState {
+    On,
+    Off,
+}
+
+#[cortex_m_rt::entry]
+fn main() -> ! {
     let p = embassy_rp::init(Default::default());
+    let led = Output::new(p.PIN_25, Level::Low);
 
-    // Create LED
-    let mut led = Output::new(p.PIN_25, Level::Low);
+    spawn_core1(p.CORE1, unsafe { &mut CORE1_STACK }, move || {
+        let executor1 = EXECUTOR1.init(Executor::new());
+        executor1.run(|spawner| unwrap!(spawner.spawn(core1_task(led))));
+    });
 
-    // Loop
+    let executor0 = EXECUTOR0.init(Executor::new());
+    executor0.run(|spawner| unwrap!(spawner.spawn(core0_task())));
+}
+
+#[embassy_executor::task]
+async fn core0_task() {
+    info!("Hello from core 0");
     loop {
-        // Log
-        info!("LED On!");
-
-        // Turn LED On
-        led.set_high();
-
-        // Wait 100ms
-        Timer::after(Duration::from_millis(100)).await;
-
-        // Log
-        info!("LED Off!");
-
-        // Turn Led Off
-        led.set_low();
-
-        // Wait 100ms
+        CHANNEL.send(LedState::On).await;
         Timer::after(Duration::from_millis(100)).await;
+        CHANNEL.send(LedState::Off).await;
+        Timer::after(Duration::from_millis(400)).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn core1_task(mut led: Output<'static, PIN_25>) {
+    info!("Hello from core 1");
+    loop {
+        match CHANNEL.recv().await {
+            LedState::On => led.set_high(),
+            LedState::Off => led.set_low(),
+        }
     }
 }