rp/gpio: set up gpio interrupts only once

doing this setup work repeatedly, on every wait, is unnecessary. with
nothing ever disabling the interrupt it is sufficient to enable it once
during device init and never touch it again.

1 files changed, 63 insertions, 0 deletions

diff --git a/tests/rp/src/bin/gpio_multicore.rs b/tests/rp/src/bin/gpio_multicore.rs
new file mode 100644
index 000000000..6c13ccaae
--- /dev/null
+++ b/tests/rp/src/bin/gpio_multicore.rs
@@ -0,0 +1,63 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+use defmt::{info, unwrap};
+use embassy_executor::Executor;
+use embassy_executor::_export::StaticCell;
+use embassy_rp::gpio::{Input, Level, Output, Pull};
+use embassy_rp::multicore::{spawn_core1, Stack};
+use embassy_rp::peripherals::{PIN_0, PIN_1};
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
+use embassy_sync::channel::Channel;
+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<CriticalSectionRawMutex, (), 1> = Channel::new();
+static CHANNEL1: Channel<CriticalSectionRawMutex, (), 1> = Channel::new();
+
+#[cortex_m_rt::entry]
+fn main() -> ! {
+    let p = embassy_rp::init(Default::default());
+    spawn_core1(p.CORE1, unsafe { &mut CORE1_STACK }, move || {
+        let executor1 = EXECUTOR1.init(Executor::new());
+        executor1.run(|spawner| unwrap!(spawner.spawn(core1_task(p.PIN_1))));
+    });
+    let executor0 = EXECUTOR0.init(Executor::new());
+    executor0.run(|spawner| unwrap!(spawner.spawn(core0_task(p.PIN_0))));
+}
+
+#[embassy_executor::task]
+async fn core0_task(p: PIN_0) {
+    info!("CORE0 is running");
+
+    let mut pin = Output::new(p, Level::Low);
+
+    CHANNEL0.send(()).await;
+    CHANNEL1.recv().await;
+
+    pin.set_high();
+
+    CHANNEL1.recv().await;
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}
+
+#[embassy_executor::task]
+async fn core1_task(p: PIN_1) {
+    info!("CORE1 is running");
+
+    CHANNEL0.recv().await;
+
+    let mut pin = Input::new(p, Pull::Down);
+    let wait = pin.wait_for_rising_edge();
+
+    CHANNEL1.send(()).await;
+
+    wait.await;
+
+    CHANNEL1.send(()).await;
+}