Add embassy example

examples/rtic/Cargo.toml

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+[package]
+name = "rtic-example"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
+cortex-m-rt = "0.7"
+embedded-hal = "1"
+rtt-target = { version = "0.5" }
+rtic-sync = { version = "1.3", features = ["defmt-03"] }
+panic-rtt-target = { version = "0.1.3" }
+
+[dependencies.va416xx-hal]
+path = "../../va416xx-hal"
+features = ["va41630"]
+
+[dependencies.rtic]
+version = "2"
+features = ["thumbv7-backend"]
+
+[dependencies.rtic-monotonics]
+version = "2"
+features = ["cortex-m-systick"]

examples/rtic/src/bin/rtic-empty.rs

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+//! Empty RTIC project template
+#![no_main]
+#![no_std]
+
+#[rtic::app(device = pac)]
+mod app {
+    use panic_rtt_target as _;
+    use rtt_target::{rprintln, rtt_init_default};
+    use va416xx_hal::pac;
+
+    #[local]
+    struct Local {}
+
+    #[shared]
+    struct Shared {}
+
+    #[init]
+    fn init(_ctx: init::Context) -> (Shared, Local) {
+        rtt_init_default!();
+        rprintln!("-- Vorago RTIC template --");
+        (Shared {}, Local {})
+    }
+
+    // `shared` cannot be accessed from this context
+    #[idle]
+    fn idle(_cx: idle::Context) -> ! {
+        #[allow(clippy::empty_loop)]
+        loop {}
+    }
+}

examples/rtic/src/main.rs

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+//! RTIC minimal blinky
+#![no_main]
+#![no_std]
+
+#[rtic::app(device = pac, dispatchers = [U1, U2, U3])]
+mod app {
+    use cortex_m::asm;
+    use embedded_hal::digital::StatefulOutputPin;
+    use panic_rtt_target as _;
+    use rtic_monotonics::systick::prelude::*;
+    use rtic_monotonics::Monotonic;
+    use rtt_target::{rprintln, rtt_init_default};
+    use va416xx_hal::{
+        gpio::{OutputReadablePushPull, Pin, PinsG, PG5},
+        pac,
+    };
+
+    #[local]
+    struct Local {
+        led: Pin<PG5, OutputReadablePushPull>,
+    }
+
+    #[shared]
+    struct Shared {}
+
+    rtic_monotonics::systick_monotonic!(Mono, 10_000);
+
+    #[init]
+    fn init(_ctx: init::Context) -> (Shared, Local) {
+        rtt_init_default!();
+        rprintln!("-- Vorago RTIC template --");
+        let mut dp = pac::Peripherals::take().unwrap();
+        let portg = PinsG::new(&mut dp.sysconfig, dp.portg);
+        let led = portg.pg5.into_readable_push_pull_output();
+        blinky::spawn().ok();
+        (Shared {}, Local { led })
+    }
+
+    // `shared` cannot be accessed from this context
+    #[idle]
+    fn idle(_cx: idle::Context) -> ! {
+        loop {
+            asm::nop();
+        }
+    }
+
+    #[task(
+        priority = 3,
+        local=[led],
+    )]
+    async fn blinky(cx: blinky::Context) {
+        loop {
+            cx.local.led.toggle().ok();
+            Mono::delay(200.millis()).await;
+        }
+    }
+}