Alternate LED state to demonstrate HW bringup

src/bin/main.rs

@@ -11,7 +11,10 @@ use defmt::info;
 use embassy_executor::Spawner;
 use embassy_time::{Duration, Timer};
 use esp_hal::clock::CpuClock;
+use esp_hal::spi::master::{Spi, Config as SpiConfig};
+use esp_hal::time::Rate;
 use esp_hal::timer::timg::TimerGroup;
+use ws2812_rs::{WS2812SPI, SendColorBySPI, Color};
 
 #[panic_handler]
 fn panic(_: &core::panic::PanicInfo) -> ! {
@@ -42,15 +45,22 @@ async fn main(spawner: Spawner) -> ! {
   let timg0 = TimerGroup::new(peripherals.TIMG0);
   esp_rtos::start(timg0.timer0);
 
-  info!("Embassy initialized!");
-
   // TODO: Spawn some tasks
   let _ = spawner;
 
+  const LED_SPI_HZ: u32 = 3_200_000;
+  let spi = Spi::new(peripherals.SPI2,
+                     SpiConfig::default().with_frequency(Rate::from_hz(LED_SPI_HZ)))
+    .unwrap()
+    .with_mosi(peripherals.GPIO48);
+  let mut led = WS2812SPI::new(spi);
+
+  info!("Padmapper initialized!");
+
   loop {
-    info!("Hello world!");
+    led.color_send_by_spi(Color([0, 0, 8]), LED_SPI_HZ).unwrap();
+    Timer::after(Duration::from_secs(1)).await;
+    led.color_send_by_spi(Color([8, 0, 8]), LED_SPI_HZ).unwrap();
     Timer::after(Duration::from_secs(1)).await;
   }
-
-  // for inspiration have a look at the examples at https://github.com/esp-rs/esp-hal/tree/esp-hal-v1.0.0/examples
 }