more monotonic timer docs

covers

- initialization and configuration of the timer; this is now a responsibility of
  the application author
- correctness of `Monotonic::now()` in `#[init]`
- safety of `Monotonic::reset()`

closes #251

1 files changed, 2 insertions, 0 deletions

diff --git a/examples/baseline.rs b/examples/baseline.rs
index b7144dd..df0ff9a 100644
--- a/examples/baseline.rs
+++ b/examples/baseline.rs
@@ -14,6 +14,8 @@ use panic_semihosting as _;
 const APP: () = {
     #[init(spawn = [foo])]
     fn init(cx: init::Context) {
+        // omitted: initialization of `CYCCNT`
+
         hprintln!("init(baseline = {:?})", cx.start).unwrap();
 
         // `foo` inherits the baseline of `init`: `Instant(0)`