Use monotonic as the defmt timestamp.

Author: thejpster

neotron-bmc-pico/src/lib.rs

@@ -1,7 +1,5 @@
 #![no_std]
 
-use core::sync::atomic::{AtomicUsize, Ordering};
-
 use defmt_rtt as _; // global logger
 use panic_probe as _;
 use stm32f0xx_hal as _; // memory layout // panic handler
@@ -17,14 +15,6 @@ fn panic() -> ! {
 	cortex_m::asm::udf()
 }
 
-static COUNT: AtomicUsize = AtomicUsize::new(0);
-defmt::timestamp!("{=usize}", {
-	// NOTE(no-CAS) `timestamps` runs with interrupts disabled
-	let n = COUNT.load(Ordering::Relaxed);
-	COUNT.store(n + 1, Ordering::Relaxed);
-	n
-});
-
 /// Terminates the application and makes `probe-run` exit with exit-code = 0
 pub fn exit() -> ! {
 	loop {

neotron-bmc-pico/src/main.rs

@@ -75,6 +75,8 @@ mod app {
 	use super::*;
 	use systick_monotonic::*; // Implements the `Monotonic` trait
 
+	defmt::timestamp!("{=u64}", monotonics::now().ticks());
+
 	pub enum Message {
 		/// Word from PS/2 port 0
 		Ps2Data0(u16),