Implement TryFrom<u32> for ledc::timer::config::Duty (#1984)

* feat(buzzer): Add `esp-hal-buzzer` to drive a piezo-electric buzzer.

Provides a driver for a piezo-electric buzzer by abstracting LEDC and offering a user-friendly API for a buzzer

* Move songs into example and refactor songs module.

* Move `esp-hal-buzzer` to https://github.com/esp-rs/esp-hal-community/

* Update `CHANGELOG.md`

---------

Co-authored-by: Jesse Braham <jesse@beta7.io>

esp-hal/CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - You can now use `Input`, `Output`, `OutputOpenDrain` and `Flex` pins as EXTI and RTCIO wakeup sources (#2095)
 - Added `Rtc::set_current_time` to allow setting RTC time, and `Rtc::current_time` to getting RTC time while taking into account boot time (#1883)
 - Added APIs to allow connecting signals through the GPIO matrix. (#2128)
+- Implement `TryFrom<u32>` for `ledc::timer::config::Duty` (#1984)
 
 ### Changed
 

esp-hal/src/ledc/timer.rs

@@ -117,6 +117,42 @@ pub mod config {
         Duty20Bit,
     }
 
+    impl TryFrom<u32> for Duty {
+        type Error = ();
+
+        fn try_from(value: u32) -> Result<Self, Self::Error> {
+            Ok(match value {
+                1 => Self::Duty1Bit,
+                2 => Self::Duty2Bit,
+                3 => Self::Duty3Bit,
+                4 => Self::Duty4Bit,
+                5 => Self::Duty5Bit,
+                6 => Self::Duty6Bit,
+                7 => Self::Duty7Bit,
+                8 => Self::Duty8Bit,
+                9 => Self::Duty9Bit,
+                10 => Self::Duty10Bit,
+                11 => Self::Duty11Bit,
+                12 => Self::Duty12Bit,
+                13 => Self::Duty13Bit,
+                14 => Self::Duty14Bit,
+                #[cfg(esp32)]
+                15 => Self::Duty15Bit,
+                #[cfg(esp32)]
+                16 => Self::Duty16Bit,
+                #[cfg(esp32)]
+                17 => Self::Duty17Bit,
+                #[cfg(esp32)]
+                18 => Self::Duty18Bit,
+                #[cfg(esp32)]
+                19 => Self::Duty19Bit,
+                #[cfg(esp32)]
+                20 => Self::Duty20Bit,
+                _ => Err(())?,
+            })
+        }
+    }
+
     /// Timer configuration
     #[derive(Copy, Clone)]
     pub struct Config<CS> {