Merge pull request #2912 from brunob45/simple_capture

STM32 Input Capture

1 files changed, 52 insertions, 0 deletions

diff --git a/examples/stm32f4/src/bin/input_capture.rs b/examples/stm32f4/src/bin/input_capture.rs
new file mode 100644
index 000000000..49de33d2b
--- /dev/null
+++ b/examples/stm32f4/src/bin/input_capture.rs
@@ -0,0 +1,52 @@
+#![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::input_capture::{CapturePin, InputCapture};
+use embassy_stm32::timer::{self, Channel};
+use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+/// Connect PB2 and PB10 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 ch3 = CapturePin::new_ch3(p.PB10, Pull::None);
+    let mut ic = InputCapture::new(p.TIM2, None, None, Some(ch3), None, Irqs, khz(1000), Default::default());
+
+    loop {
+        info!("wait for risign edge");
+        ic.wait_for_rising_edge(Channel::Ch3).await;
+
+        let capture_value = ic.get_capture_value(Channel::Ch3);
+        info!("new capture! {}", capture_value);
+    }
+}