Blinking LED

This one actually blinks!

(example code from stm32l1xx-hal)

Cargo.toml

@@ -12,6 +12,7 @@ cortex-m = "^0.6.3"      # Access to the generic ARM peripherals
 cortex-m-rt = "^0.6.12"  # Startup code for the ARM Core
 embedded-hal = "^0.2.4"  # Access to generic embedded functions (`set_high`)
 panic-halt = "^0.2.0"    # Panic handler
+panic-semihosting = "0.6.0"
 
 # Access the SMT32L152TB6 HAL
 [dependencies.stm32l1xx-hal]

src/main.rs

@@ -5,31 +5,28 @@
 
 extern crate cortex_m;
 extern crate cortex_m_rt as rt;
+extern crate panic_semihosting;
 extern crate stm32l1xx_hal as hal;
 
-use core::panic::PanicInfo;
-use embedded_hal::digital::v2::OutputPin;
+use embedded_hal::digital::v2::ToggleableOutputPin;
 use hal::prelude::*;
+use hal::rcc::Config;
 use hal::stm32;
 use rt::entry;
 
 #[entry]
 fn main() -> ! {
     let dp = stm32::Peripherals::take().unwrap();
+    let cp = cortex_m::Peripherals::take().unwrap();
+
+    let rcc = dp.RCC.freeze(Config::default());
+    let mut delay = cp.SYST.delay(rcc.clocks);
+
     let gpiob = dp.GPIOB.split();
-    let mut led = gpiob.pb7.into_push_pull_output();
+    let mut led = gpiob.pb6.into_push_pull_output();
 
     loop {
-        for _ in 0..1_000 {
-            led.set_high().unwrap();
-        }
-        for _ in 0..1_000 {
-            led.set_low().unwrap();
-        }
+        led.toggle().unwrap();
+        delay.delay(300.ms());
     }
 }
-
-#[panic_handler]
-fn panic(_info: &PanicInfo) -> ! {
-    loop {}
-}