Blinky STM32F3-DISCOVERY

src/main.rs

@@ -3,15 +3,49 @@
 
 // pick a panicking behavior
 use panic_halt as _; // you can put a breakpoint on `rust_begin_unwind` to catch panics
-// use panic_abort as _; // requires nightly
-// use panic_itm as _; // logs messages over ITM; requires ITM support
-// use panic_semihosting as _; // logs messages to the host stderr; requires a debugger
+                     // use panic_abort as _; // requires nightly
+                     // use panic_itm as _; // logs messages over ITM; requires ITM support
+                     // use panic_semihosting as _; // logs messages to the host stderr; requires a debugger
 
+use cortex_m::peripheral::{syst, Peripherals};
 use cortex_m_rt::entry;
 
+use stm32f3::stm32f303;
+
 #[entry]
 fn main() -> ! {
+    let cortex_peripherals = Peripherals::take().unwrap();
+    let mut systick = cortex_peripherals.SYST;
+    systick.set_clock_source(syst::SystClkSource::Core);
+    systick.set_reload(8_000_000); // 1s
+    systick.clear_current();
+
+    let device_peripherals = stm32f303::Peripherals::take().unwrap();
+    let rcc = device_peripherals.RCC;
+    rcc.ahbenr().write(|w| w.iopeen().set_bit());
+    // PE9: LD3 (red)
+    // PE8: LD4 (blue)
+    // PE10: LD5 (orange)
+    let gpioe = device_peripherals.GPIOE;
+    gpioe
+        .moder()
+        .write(|w| w.moder9().output().moder8().output().moder10().output());
+    gpioe.bsrr().write(|w| w.bs9().set_bit());
+    gpioe.bsrr().write(|w| w.bs8().set_bit());
+    gpioe.bsrr().write(|w| w.bs10().set_bit());
+
+    systick.enable_counter();
+    let mut enabled = true;
     loop {
-        // your code goes here
+        while !systick.has_wrapped() {}
+        enabled = !enabled;
+        gpioe.odr().write(|w| {
+            w.odr8()
+                .bit(enabled)
+                .odr9()
+                .bit(enabled)
+                .odr10()
+                .bit(enabled)
+        });
     }
 }