message: Add more debugging information.
diff: @@ -11,20 +11,26 @@ use libtock::timer::Duration;
  #[libtock::main]
  async fn main() -> TockResult<()> {
  - let mut console = Console::new();
  const DELAY_MS: isize = 50;
  + let mut console = Console::new();
  + let mut previous_ticks = None;
  +
  for i in 0.. {
  let mut timer_with_callback = timer::with_callback(|_, _| {});
  let timer = timer_with_callback.init()?;
  let ticks = timer.get_current_clock()?.num_ticks();
  + let frequency = timer.clock_frequency().hz();
  writeln!(
  console,
  - "[{}] Waited {} ms. Now is {:#010x} ticks",
  + "[{}] Waited {} ms. Now is {:#010x} ticks ({} ticks since last time at {} Hz)",
  i,
  i * DELAY_MS,
  - ticks
  + ticks,
  + previous_ticks.map(|previous| ticks - previous),
  + frequency
  )?;
  + previous_ticks = Some(ticks);
  timer::sleep(Duration::from_ms(DELAY_MS)).await?;
  }
  