Add a new example for defmt use

Signed-off-by: Daniel Egger <[email protected]>

Author: therealprof

.cargo/config.toml

@@ -2,6 +2,8 @@
 runner = 'probe-rs run --protocol=swd --chip STM32F042K6'
 rustflags = [
   "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=--nmagic",
+  "-C", "link-arg=-Tdefmt.x",
 ]
 
 [build]

examples/defmt.rs

@@ -3,7 +3,6 @@
 
 use panic_halt as _;
 use defmt_rtt as _;
-use defmt as _;
 
 use stm32f0xx_hal as _;
 
@@ -12,7 +11,6 @@ use cortex_m_rt::entry;
 #[entry]
 fn main() -> ! {
     defmt::println!("Hello, world!");
-    defmt::timestamp!("Hello, world!");
 
     loop { }
 }