Basis for firmware

firmware/src/main.rs

@@ -0,0 +1,45 @@
+#![no_std]
+#![no_main]
+
+use panic_halt as _;
+use cortex_m_rt::entry;
+use stm32f0xx_hal::{
+    prelude::*,
+    stm32,
+    delay::Delay,
+};
+
+#[entry]
+fn main() -> ! {
+    // Get device peripherals
+    let mut dp = stm32::Peripherals::take().unwrap();
+    let cp = cortex_m::Peripherals::take().unwrap();
+    
+    // Configure the clock to 48 MHz
+    let mut rcc = dp.RCC.configure()
+        .hsi48()
+        .enable_crs(dp.CRS)
+        .sysclk(48.mhz())
+        .pclk(24.mhz())
+        .freeze(&mut dp.FLASH);
+    
+    // Set up delay provider
+    let mut delay = Delay::new(cp.SYST, &rcc);
+    
+    // Configure GPIO
+    let gpioa = dp.GPIOA.split(&mut rcc);
+
+    // Configure PA5 as push-pull output (common LED pin)
+    let mut led = cortex_m::interrupt::free(|cs| {
+        gpioa.pa5.into_push_pull_output(cs)
+    });
+    
+    // Blink loop
+    loop {
+        led.set_high().ok();
+        delay.delay_ms(500u16);
+        
+        led.set_low().ok();
+        delay.delay_ms(500u16);
+    }
+}