nrf/ppi: implement and add example

embassy-nrf-examples/src/bin/ppi.rs

@@ -0,0 +1,112 @@
+#![no_std]
+#![no_main]
+#![feature(min_type_alias_impl_trait)]
+#![feature(impl_trait_in_bindings)]
+#![feature(type_alias_impl_trait)]
+#![allow(incomplete_features)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use core::future::pending;
+
+use example_common::*;
+
+use cortex_m_rt::entry;
+use defmt::panic;
+
+use embassy::executor::{task, Executor};
+use embassy::util::Forever;
+use embassy_nrf::gpio::{Input, Level, Output, OutputDrive, Pull};
+use embassy_nrf::gpiote::{self, InputChannel, InputChannelPolarity};
+use embassy_nrf::ppi::Ppi;
+use embassy_nrf::{interrupt, Peripherals};
+use futures::future;
+use gpiote::{OutputChannel, OutputChannelPolarity};
+
+#[task]
+async fn run() {
+    let p = Peripherals::take().unwrap();
+    let g = gpiote::initialize(p.GPIOTE, interrupt::take!(GPIOTE));
+
+    info!("Starting!");
+
+    let button1 = InputChannel::new(
+        g,
+        p.GPIOTE_CH0,
+        Input::new(p.P0_11, Pull::Up),
+        InputChannelPolarity::HiToLo,
+    );
+    let button2 = InputChannel::new(
+        g,
+        p.GPIOTE_CH1,
+        Input::new(p.P0_12, Pull::Up),
+        InputChannelPolarity::HiToLo,
+    );
+    let button3 = InputChannel::new(
+        g,
+        p.GPIOTE_CH2,
+        Input::new(p.P0_24, Pull::Up),
+        InputChannelPolarity::HiToLo,
+    );
+    let button4 = InputChannel::new(
+        g,
+        p.GPIOTE_CH3,
+        Input::new(p.P0_25, Pull::Up),
+        InputChannelPolarity::HiToLo,
+    );
+
+    let led1 = OutputChannel::new(
+        g,
+        p.GPIOTE_CH4,
+        Output::new(p.P0_13, Level::Low, OutputDrive::Standard),
+        OutputChannelPolarity::Toggle,
+    );
+
+    let led2 = OutputChannel::new(
+        g,
+        p.GPIOTE_CH5,
+        Output::new(p.P0_14, Level::Low, OutputDrive::Standard),
+        OutputChannelPolarity::Toggle,
+    );
+
+    let mut ppi = Ppi::new(p.PPI_CH0);
+    ppi.set_event(button1.event_in());
+    ppi.set_task(led1.task_out());
+    ppi.enable();
+
+    let mut ppi = Ppi::new(p.PPI_CH1);
+    ppi.set_event(button2.event_in());
+    ppi.set_task(led1.task_clr());
+    ppi.enable();
+
+    let mut ppi = Ppi::new(p.PPI_CH2);
+    ppi.set_event(button3.event_in());
+    ppi.set_task(led1.task_set());
+    ppi.enable();
+
+    let mut ppi = Ppi::new(p.PPI_CH3);
+    ppi.set_event(button4.event_in());
+    ppi.set_task(led1.task_out());
+    ppi.set_fork_task(led2.task_out());
+    ppi.enable();
+
+    info!("PPI setup!");
+    info!("Press button 1 to toggle LED 1");
+    info!("Press button 2 to turn on LED 1");
+    info!("Press button 3 to turn off LED 1");
+    info!("Press button 4 to toggle LEDs 1 and 2");
+    // Block forever so the above drivers don't get dropped
+    pending::<()>().await;
+}
+
+static EXECUTOR: Forever<Executor> = Forever::new();
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let executor = EXECUTOR.put(Executor::new());
+    executor.run(|spawner| {
+        unwrap!(spawner.spawn(run()));
+    });
+}