39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
//! This example shows how to create a pwm using the PIO module in the RP2040 chip.
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#![no_std]
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#![no_main]
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use core::time::Duration;
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use embassy_executor::Spawner;
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use embassy_rp::bind_interrupts;
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use embassy_rp::peripherals::PIO0;
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use embassy_rp::pio::{InterruptHandler, Pio};
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use embassy_rp::pio_programs::pwm::{PioPwm, PioPwmProgram};
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use embassy_time::Timer;
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use {defmt_rtt as _, panic_probe as _};
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const REFRESH_INTERVAL: u64 = 20000;
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bind_interrupts!(struct Irqs {
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PIO0_IRQ_0 => InterruptHandler<PIO0>;
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});
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_rp::init(Default::default());
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let Pio { mut common, sm0, .. } = Pio::new(p.PIO0, Irqs);
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// Note that PIN_25 is the led pin on the Pico
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let prg = PioPwmProgram::new(&mut common);
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let mut pwm_pio = PioPwm::new(&mut common, sm0, p.PIN_25, &prg);
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pwm_pio.set_period(Duration::from_micros(REFRESH_INTERVAL));
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pwm_pio.start();
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let mut duration = 0;
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loop {
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duration = (duration + 1) % 1000;
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pwm_pio.write(Duration::from_micros(duration));
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Timer::after_millis(1).await;
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}
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}
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