Merge pull request #3014 from brunob45/pwm_input

Add PWM Input for STM32

1 files changed, 54 insertions, 0 deletions

diff --git a/examples/stm32f4/src/bin/pwm_input.rs b/examples/stm32f4/src/bin/pwm_input.rs
new file mode 100644
index 000000000..ce200549d
--- /dev/null
+++ b/examples/stm32f4/src/bin/pwm_input.rs
@@ -0,0 +1,54 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_stm32::gpio::{Level, Output, Pull, Speed};
+use embassy_stm32::time::khz;
+use embassy_stm32::timer::pwm_input::PwmInput;
+use embassy_stm32::{bind_interrupts, peripherals, timer};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+/// Connect PB2 and PA6 with a 1k Ohm resistor
+
+#[embassy_executor::task]
+async fn blinky(led: peripherals::PB2) {
+    let mut led = Output::new(led, Level::High, Speed::Low);
+
+    loop {
+        info!("high");
+        led.set_high();
+        Timer::after_millis(300).await;
+
+        info!("low");
+        led.set_low();
+        Timer::after_millis(300).await;
+    }
+}
+
+bind_interrupts!(struct Irqs {
+    TIM2 => timer::CaptureCompareInterruptHandler<peripherals::TIM2>;
+});
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let p = embassy_stm32::init(Default::default());
+    info!("Hello World!");
+
+    unwrap!(spawner.spawn(blinky(p.PB2)));
+
+    let mut pwm_input = PwmInput::new(p.TIM3, p.PA6, Pull::None, khz(10));
+    pwm_input.enable();
+
+    loop {
+        Timer::after_millis(500).await;
+        let period = pwm_input.get_period_ticks();
+        let width = pwm_input.get_width_ticks();
+        let duty_cycle = pwm_input.get_duty_cycle();
+        info!(
+            "period ticks: {} width ticks: {} duty cycle: {}",
+            period, width, duty_cycle
+        );
+    }
+}