chore: try semihosting

Cargo.toml

@@ -8,13 +8,10 @@ authors = ["Luca Zulian <lucagiuggia@gmail.com>"]
 [dependencies]
 cortex-m = "0.5.8"
 cortex-m-rt = "0.6.5"
-cortex-m-semihosting = "0.3.2"
 panic-halt = "0.2.0"
-stm32l4xx-hal = { version = "0.5", features = ["rt", "stm32l4x2"] }
-
-#[dependencies.stm32l4]
-#version = "0.14.0"
-#features = ["stm32l4x2", "rt"]
+panic-semihosting = "0.5.0"
+cortex-m-semihosting = "0.3.5"
+stm32l4xx-hal = { version = "0.6.0", features = ["rt", "stm32l4x2"] }
 
 [[bin]]
 name = "stm"

src/blink.rs

@@ -10,6 +10,7 @@ use cortex_m::peripheral::syst::SystClkSource;
 use cortex_m_rt::entry;
 use stm32l4xx_hal as hal;
 use hal::prelude::*;
+use cortex_m_semihosting::{hprintln};
 
 #[entry]
 fn main() -> ! {
@@ -30,6 +31,8 @@ fn main() -> ! {
     loop {
         while !syst.has_wrapped() {};
         let _ = ld4.set_high();
+        
+        hprintln!("Hello, world!").unwrap();
 
         while !syst.has_wrapped() {};
         let _ = ld4.set_low();