nrf/gpiote: add support for nrf51.

tests/nrf51422/Cargo.toml

@@ -7,10 +7,11 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 teleprobe-meta = "1"
 
+embassy-futures = { version = "0.1.0", path = "../../embassy-futures" }
 embassy-sync = { version = "0.5.0", path = "../../embassy-sync", features = ["defmt", ] }
 embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "task-arena-size-128", "integrated-timers"] }
 embassy-time = { version = "0.3.0", path = "../../embassy-time", features = ["defmt",  "defmt-timestamp-uptime"] }
-embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt",  "nrf51", "time-driver-rtc1", "unstable-pac", "time"] }
+embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt",  "nrf51", "time-driver-rtc1", "unstable-pac", "time", "gpiote"] }
 embedded-io-async = { version = "0.6.1", features = ["defmt-03"] }
 embedded-hal-async = { version = "1.0" }
 

tests/nrf51422/src/bin/gpiote.rs

@@ -0,0 +1,47 @@
+#![no_std]
+#![no_main]
+teleprobe_meta::target!(b"nrf51-dk");
+
+use defmt::{assert, info};
+use embassy_executor::Spawner;
+use embassy_futures::join::join;
+use embassy_nrf::gpio::{Input, Level, Output, OutputDrive, Pull};
+use embassy_time::{Duration, Instant, Timer};
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = embassy_nrf::init(Default::default());
+
+    let mut input = Input::new(p.P0_13, Pull::Up);
+    let mut output = Output::new(p.P0_14, Level::Low, OutputDrive::Standard);
+
+    let fut1 = async {
+        Timer::after_millis(100).await;
+        output.set_high();
+    };
+    let fut2 = async {
+        let start = Instant::now();
+        input.wait_for_high().await;
+        let dur = Instant::now() - start;
+        assert!((Duration::from_millis(90)..Duration::from_millis(110)).contains(&dur));
+    };
+
+    join(fut1, fut2).await;
+
+    let fut1 = async {
+        Timer::after_millis(100).await;
+        output.set_low();
+    };
+    let fut2 = async {
+        let start = Instant::now();
+        input.wait_for_low().await;
+        let dur = Instant::now() - start;
+        assert!((Duration::from_millis(90)..Duration::from_millis(110)).contains(&dur));
+    };
+
+    join(fut1, fut2).await;
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}