Adds a simple_pwm example for arduino-uno

Author: dalpil

examples/arduino-uno/src/bin/uno-simple-pwm.rs

@@ -0,0 +1,27 @@
+/*!
+ * Example of using simple_pwm to fade a LED in and out on pin d5.
+ */
+#![no_std]
+#![no_main]
+
+use arduino_hal::simple_pwm::*;
+use panic_halt as _;
+
+#[arduino_hal::entry]
+fn main() -> ! {
+    let dp = arduino_hal::Peripherals::take().unwrap();
+    let pins = arduino_hal::pins!(dp);
+
+    let timer0 = Timer0Pwm::new(dp.TC0, Prescaler::Prescale64);
+
+    // Digital pin 5 is connected to a LED and a resistor in series
+    let mut pwm_led = pins.d5.into_output().into_pwm(&timer0);
+    pwm_led.enable();
+
+    loop {
+        for x in (0..=255).chain((0..=254).rev()) {
+            pwm_led.set_duty(x);
+            arduino_hal::delay_ms(10);
+        }
+    }
+}