1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
//! This example showcases how to create task
#![no_std]
#![no_main]
use core::sync::atomic::{AtomicU32, Ordering};
use defmt::info;
use embassy_executor::Spawner;
use embassy_stm32::exti::ExtiInput;
use embassy_stm32::gpio::{AnyPin, Level, Output, Pull, Speed};
use embassy_stm32::Peri;
use embassy_time::Timer;
use {defmt_rtt as _, panic_probe as _};
static BLINK_MS: AtomicU32 = AtomicU32::new(0);
#[embassy_executor::task]
async fn led_task(led: Peri<'static, AnyPin>) {
// Configure the LED pin as a push pull output and obtain handler.
// On the Nucleo F091RC there's an on-board LED connected to pin PA5.
let mut led = Output::new(led, Level::Low, Speed::Low);
loop {
let del = BLINK_MS.load(Ordering::Relaxed);
info!("Value of del is {}", del);
Timer::after_millis(del.into()).await;
info!("LED toggling");
led.toggle();
}
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
// Initialize and create handle for devicer peripherals
let p = embassy_stm32::init(Default::default());
// Configure the button pin and obtain handler.
// On the Nucleo F091RC there is a button connected to pin PC13.
let mut button = ExtiInput::new(p.PC13, p.EXTI13, Pull::None);
// Create and initialize a delay variable to manage delay loop
let mut del_var = 2000;
// Blink duration value to global context
BLINK_MS.store(del_var, Ordering::Relaxed);
// Spawn LED blinking task
spawner.spawn(led_task(p.PA5.into()).unwrap());
loop {
// Check if button got pressed
button.wait_for_rising_edge().await;
info!("rising_edge");
del_var = del_var - 200;
// If updated delay value drops below 200 then reset it back to starting value
if del_var < 200 {
del_var = 2000;
}
// Updated delay value to global context
BLINK_MS.store(del_var, Ordering::Relaxed);
}
}
|
