Get a dummy keyboard working

src/led.rs

@@ -0,0 +1,25 @@
+use adafruit_itsy_bitsy_rp2040::hal::gpio::{Output, Pin, PinId, PushPull};
+use cortex_m::delay::Delay;
+use embedded_hal::digital::v2::OutputPin;
+
+pub struct Led<I: PinId> {
+    pub pin: Pin<I, Output<PushPull>>,
+}
+
+pub struct Blink {
+    ms: u32,
+}
+
+pub const SHORT: Blink = Blink { ms: 200 };
+pub const LONG: Blink = Blink { ms: 600 };
+
+impl<I: PinId> Led<I> {
+    pub fn dance(&mut self, delay: &mut Delay, moves: &[Blink]) {
+        for m in moves {
+            self.pin.set_high().unwrap();
+            delay.delay_ms(m.ms);
+            self.pin.set_low().unwrap();
+            delay.delay_ms(100);
+        }
+    }
+}