feat: 蜂鸣。

src/beep.rs

@@ -0,0 +1,57 @@
+use esp_idf_hal::gpio::OutputPin;
+use esp_idf_hal::ledc;
+use esp_idf_hal::ledc::{config::TimerConfig, Channel, Timer};
+use esp_idf_hal::peripherals::Peripherals;
+use esp_idf_hal::prelude::*;
+use esp_idf_sys::EspError;
+use std::thread;
+use std::time::Duration;
+
+type LedcChannel<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> = Channel<C, T, Timer<T>, P>;
+
+pub struct Beep<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> {
+    state: bool,
+    stopped: bool,
+    channel: LedcChannel<P, T, C>,
+}
+
+impl<P: OutputPin, T: ledc::HwTimer, C: ledc::HwChannel> Beep<P, T, C> {
+    pub fn new(pin: P, timer: T, channel: C) -> Result<Self, EspError> {
+        return Ok(Beep {
+            state: false,
+            stopped: false,
+            channel: Self::init_channel(pin, timer, channel)?,
+        });
+    }
+
+    fn init_channel(pin: P, timer: T, channel: C) -> Result<LedcChannel<P, T, C>, EspError> {
+        let config = TimerConfig::default().frequency(1.kHz().into());
+        let timer = Timer::new(timer, &config)?;
+        let mut channel = Channel::new(channel, timer, pin)?;
+        let max_duty = channel.get_max_duty();
+        channel.set_duty(max_duty * 3 / 4)?;
+        return Ok(channel);
+    }
+
+    pub fn toggle(&mut self) -> Result<(), EspError> {
+        self.state = !self.state;
+        if self.state {
+            self.channel.set_duty(50)
+        } else {
+            self.channel.set_duty(0)
+        }
+    }
+
+    pub fn play(&mut self) {
+        loop {
+            if self.stopped {
+                break;
+            }
+            self.toggle().unwrap();
+            thread::sleep(Duration::from_millis(500));
+
+            self.toggle().unwrap();
+            thread::sleep(Duration::from_millis(1500));
+        }
+    }
+}

src/lib.rs

@@ -1 +0,0 @@
-pub mod blink;

src/main.rs

@@ -1,8 +1,8 @@
 use esp_idf_sys as _;
 use std::thread;
-use ups_esp32c3_rust::beep;
-use ups_esp32c3_rust::blink;
 
+mod beep;
+mod blink;
 fn main() {
     // Temporary. Will disappear once ESP-IDF 4.4 is released, but for now it is necessary to call this function once,
     // or else some patches to the runtime implemented by esp-idf-sys might not link properly.
@@ -10,22 +10,25 @@ fn main() {
 
     let peripherals = esp_idf_hal::peripherals::Peripherals::take().unwrap();
 
+    let gpio5 = peripherals.pins.gpio5;
+    let gpio6 = peripherals.pins.gpio6;
+    let ledc_timer0 = peripherals.ledc.timer0;
+    let ledc_channel0 = peripherals.ledc.channel0;
     thread::spawn(move || {
-        let mut blink = blink::Blink::new(
-            peripherals
-                .pins
-                .gpio5
-                .into_output()
-                .expect("Failed to set GPIO5 as output"),
-        );
+        let mut blink =
+            blink::Blink::new(gpio5.into_output().expect("Failed to set GPIO5 as output"));
         blink.play();
     });
 
-    beep::Beep::new(peripherals
-                .pins
-                .gpio5
-                .into_output()
-                .expect("Failed to set GPIO6 as output"),);
+    thread::spawn(move || {
+        let mut beep = beep::Beep::new(
+            gpio6.into_output().expect("Failed to set GPIO6 as output"),
+            ledc_timer0,
+            ledc_channel0,
+        )
+        .expect("Failed to create beep");
+        beep.play();
+    });
 
     println!("Hello, world!");
 }