68 lines
2.1 KiB
Rust
68 lines
2.1 KiB
Rust
//! Input capture example
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//!
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//! This example showcases how to use the input capture feature of the timer peripheral.
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//! Connect PB1 and PA6 with a 1k Ohm resistor or Connect PB1 and PA8 with a 1k Ohm resistor
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//! to see the output.
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//! When connecting PB1 (software pwm) and PA6 the output is around 10000 (it will be a bit bigger, around 10040)
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//! Output is 1000 when connecting PB1 (PWMOUT) and PA6.
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//!
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#![no_std]
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#![no_main]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_stm32::gpio::{Level, Output, OutputType, Pull, Speed};
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use embassy_stm32::time::khz;
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use embassy_stm32::timer::input_capture::{CapturePin, InputCapture};
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use embassy_stm32::timer::simple_pwm::{PwmPin, SimplePwm};
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use embassy_stm32::timer::Channel;
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use embassy_stm32::{bind_interrupts, peripherals, timer};
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use embassy_time::Timer;
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use {defmt_rtt as _, panic_probe as _};
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// Connect PB1 and PA6 with a 1k Ohm resistor
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#[embassy_executor::task]
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async fn blinky(led: peripherals::PB1) {
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let mut led = Output::new(led, Level::High, Speed::Low);
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loop {
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led.set_high();
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Timer::after_millis(50).await;
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led.set_low();
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Timer::after_millis(50).await;
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}
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}
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bind_interrupts!(struct Irqs {
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TIM2 => timer::CaptureCompareInterruptHandler<peripherals::TIM2>;
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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_stm32::init(Default::default());
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info!("Hello World!");
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unwrap!(spawner.spawn(blinky(p.PB1)));
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// Connect PB1 and PA8 with a 1k Ohm resistor
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let ch1_pin = PwmPin::new_ch1(p.PA8, OutputType::PushPull);
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let mut pwm = SimplePwm::new(p.TIM1, Some(ch1_pin), None, None, None, khz(1), Default::default());
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pwm.ch1().enable();
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pwm.ch1().set_duty_cycle(50);
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let ch1 = CapturePin::new_ch1(p.PA0, Pull::None);
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let mut ic = InputCapture::new(p.TIM2, Some(ch1), None, None, None, Irqs, khz(1000), Default::default());
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let mut old_capture = 0;
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loop {
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ic.wait_for_rising_edge(Channel::Ch1).await;
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let capture_value = ic.get_capture_value(Channel::Ch1);
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info!("{}", capture_value - old_capture);
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old_capture = capture_value;
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}
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}
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