63 lines
1.9 KiB
Rust
63 lines
1.9 KiB
Rust
//! This example showcases how to create task
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#![no_std]
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#![no_main]
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use core::sync::atomic::{AtomicU32, Ordering};
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use defmt::info;
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use embassy_executor::Spawner;
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use embassy_stm32::exti::ExtiInput;
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use embassy_stm32::gpio::{AnyPin, Level, Output, Pin, Pull, Speed};
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use embassy_time::Timer;
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use {defmt_rtt as _, panic_probe as _};
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static BLINK_MS: AtomicU32 = AtomicU32::new(0);
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#[embassy_executor::task]
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async fn led_task(led: AnyPin) {
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// Configure the LED pin as a push pull output and obtain handler.
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// On the Nucleo F091RC there's an on-board LED connected to pin PA5.
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let mut led = Output::new(led, Level::Low, Speed::Low);
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loop {
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let del = BLINK_MS.load(Ordering::Relaxed);
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info!("Value of del is {}", del);
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Timer::after_millis(del.into()).await;
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info!("LED toggling");
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led.toggle();
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}
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}
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#[embassy_executor::main]
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async fn main(spawner: Spawner) {
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// Initialize and create handle for devicer peripherals
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let p = embassy_stm32::init(Default::default());
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// Configure the button pin and obtain handler.
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// On the Nucleo F091RC there is a button connected to pin PC13.
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let mut button = ExtiInput::new(p.PC13, p.EXTI13, Pull::None);
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// Create and initialize a delay variable to manage delay loop
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let mut del_var = 2000;
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// Blink duration value to global context
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BLINK_MS.store(del_var, Ordering::Relaxed);
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// Spawn LED blinking task
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spawner.spawn(led_task(p.PA5.degrade())).unwrap();
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loop {
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// Check if button got pressed
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button.wait_for_rising_edge().await;
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info!("rising_edge");
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del_var = del_var - 200;
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// If updated delay value drops below 200 then reset it back to starting value
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if del_var < 200 {
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del_var = 2000;
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}
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// Updated delay value to global context
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BLINK_MS.store(del_var, Ordering::Relaxed);
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}
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}
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