refactor: make blinky an example

.cargo/config.toml

@@ -3,6 +3,7 @@ target = "thumbv6m-none-eabi"
 
 [target.thumbv6m-none-eabi]
 runner = 'probe-rs run --chip STM32L053R8'
+rustflags = ["-Clink-args=-Tlink.x"]
 
 [alias]
 cflash = "flash --chip STM32L053R8"

build.rs

@@ -1,3 +0,0 @@
-fn main() {
-    println!("cargo:rustc-link-arg-bins=-Tlink.x");
-}

examples/blinky.rs

@@ -0,0 +1,34 @@
+#![no_main]
+#![no_std]
+
+extern crate panic_halt;
+
+use cortex_m_rt::entry;
+use hal::{pac, prelude::*, rcc::Config};
+
+#[entry]
+fn main() -> ! {
+    let dp = pac::Peripherals::take().unwrap();
+    let cp = cortex_m::Peripherals::take().unwrap();
+
+    // Configure the clock.
+    let mut rcc = dp.RCC.freeze(Config::hsi16());
+
+    // Acquire the GPIOA peripheral. This also enables the clock for GPIOA in
+    // the RCC register.
+    let gpioa = dp.GPIOA.split(&mut rcc);
+
+    // Configure PA1 as output.
+    let mut led = gpioa.pa5.into_push_pull_output();
+
+    // Get the delay provider.
+    let mut delay = cp.SYST.delay(rcc.clocks);
+
+    loop {
+        led.set_high().unwrap();
+        delay.delay_ms(500_u16);
+
+        led.set_low().unwrap();
+        delay.delay_ms(500_u16);
+    }
+}

src/main.rs

@@ -8,27 +8,5 @@ use hal::{pac, prelude::*, rcc::Config};
 
 #[entry]
 fn main() -> ! {
-    let dp = pac::Peripherals::take().unwrap();
-    let cp = cortex_m::Peripherals::take().unwrap();
-
-    // Configure the clock.
-    let mut rcc = dp.RCC.freeze(Config::hsi16());
-
-    // Acquire the GPIOA peripheral. This also enables the clock for GPIOA in
-    // the RCC register.
-    let gpioa = dp.GPIOA.split(&mut rcc);
-
-    // Configure PA1 as output.
-    let mut led = gpioa.pa5.into_push_pull_output();
-
-    // Get the delay provider.
-    let mut delay = cp.SYST.delay(rcc.clocks);
-
-    loop {
-        led.set_high().unwrap();
-        delay.delay_ms(500_u16);
-
-        led.set_low().unwrap();
-        delay.delay_ms(500_u16);
-    }
+    compile_error!("Use blinky example")
 }