mirror of
https://github.com/esp-rs/esp-hal.git
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db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
97 lines
3.0 KiB
Rust
97 lines
3.0 KiB
Rust
//! This example shows how to spawn async tasks on the second core.
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//! The second core runs a simple LED blinking task, that is controlled by a
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//! signal set by the task running on the other core.
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use embassy_sync::{blocking_mutex::raw::CriticalSectionRawMutex, signal::Signal};
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use embassy_time::{Duration, Ticker};
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use esp32_hal::{
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clock::ClockControl,
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cpu_control::{CpuControl, Stack},
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embassy::{self, executor::Executor},
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gpio::{GpioPin, Output, PushPull, IO},
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peripherals::Peripherals,
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prelude::*,
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timer::TimerGroup,
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};
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use esp_backtrace as _;
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use esp_hal_common::get_core;
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use esp_println::println;
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use static_cell::make_static;
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static mut APP_CORE_STACK: Stack<8192> = Stack::new();
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/// Waits for a message that contains a duration, then flashes a led for that
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/// duration of time.
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#[embassy_executor::task]
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async fn control_led(
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mut led: GpioPin<Output<PushPull>, 0>,
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control: &'static Signal<CriticalSectionRawMutex, bool>,
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) {
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println!("Starting control_led() on core {}", get_core() as usize);
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loop {
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if control.wait().await {
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esp_println::println!("LED on");
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led.set_low().unwrap();
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} else {
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esp_println::println!("LED off");
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led.set_high().unwrap();
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}
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}
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}
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/// Sends periodic messages to control_led, enabling or disabling it.
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#[embassy_executor::task]
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async fn enable_disable_led(control: &'static Signal<CriticalSectionRawMutex, bool>) {
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println!(
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"Starting enable_disable_led() on core {}",
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get_core() as usize
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);
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let mut ticker = Ticker::every(Duration::from_secs(1));
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loop {
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esp_println::println!("Sending LED on");
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control.signal(true);
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ticker.next().await;
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esp_println::println!("Sending LED off");
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control.signal(false);
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ticker.next().await;
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}
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}
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take();
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let system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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embassy::init(&clocks, timer_group0.timer0);
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// Set GPIO2 as an output, and set its state high initially.
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let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
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let mut cpu_control = CpuControl::new(system.cpu_control);
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let led_ctrl_signal = &*make_static!(Signal::new());
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let led = io.pins.gpio0.into_push_pull_output();
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let cpu1_fnctn = move || {
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let executor = make_static!(Executor::new());
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executor.run(|spawner| {
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spawner.spawn(control_led(led, led_ctrl_signal)).ok();
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});
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};
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let _guard = cpu_control
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.start_app_core(unsafe { &mut APP_CORE_STACK }, cpu1_fnctn)
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.unwrap();
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let executor = make_static!(Executor::new());
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executor.run(|spawner| {
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spawner.spawn(enable_disable_led(led_ctrl_signal)).ok();
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});
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}
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