diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/baseline.rs | 2 | ||||
| -rw-r--r-- | examples/periodic.rs | 2 | ||||
| -rw-r--r-- | examples/schedule.rs | 12 |
3 files changed, 13 insertions, 3 deletions
diff --git a/examples/baseline.rs b/examples/baseline.rs index b7144dd1..df0ff9a4 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)` diff --git a/examples/periodic.rs b/examples/periodic.rs index ec110e11..dca0ad56 100644 --- a/examples/periodic.rs +++ b/examples/periodic.rs @@ -16,6 +16,8 @@ const PERIOD: u32 = 8_000_000; const APP: () = { #[init(schedule = [foo])] fn init(cx: init::Context) { + // omitted: initialization of `CYCCNT` + cx.schedule.foo(Instant::now() + PERIOD.cycles()).unwrap(); } diff --git a/examples/schedule.rs b/examples/schedule.rs index 27d3bd1f..97818e36 100644 --- a/examples/schedule.rs +++ b/examples/schedule.rs @@ -1,6 +1,5 @@ //! examples/schedule.rs -#![deny(unsafe_code)] #![deny(warnings)] #![no_main] #![no_std] @@ -13,8 +12,15 @@ use rtfm::cyccnt::{Instant, U32Ext as _}; #[rtfm::app(device = lm3s6965, monotonic = rtfm::cyccnt::CYCCNT)] const APP: () = { #[init(schedule = [foo, bar])] - fn init(cx: init::Context) { - let now = Instant::now(); + fn init(mut cx: init::Context) { + // Initialize (enable) the monotonic timer (CYCCNT) + cx.core.DCB.enable_trace(); + // required on devices that software lock the DWT (e.g. STM32F7) + unsafe { cx.core.DWT.lar.write(0xC5ACCE55) } + cx.core.DWT.enable_cycle_counter(); + + // semantically, the monotonic timer is frozen at time "zero" during `init` + let now = cx.start; // the start time of the system hprintln!("init @ {:?}", now).unwrap(); |