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| author |  bors[bot] <26634292+bors[bot]@users.noreply.github.com>
| 2020-01-24 15:45:14 +0000 |
|---|---|---|
| committer |  GitHub <noreply@github.com>
| 2020-01-24 15:45:14 +0000 |
| commit | 60c14ef680c68593b2cadb24aa086d62973dcad5 (patch) | |
| tree | e17a95288ca1373436307b76ed1b99bafbe6bf38 /examples | |
| parent | 03ac76a0a209f4af2baaf4bb56057b96a672e391 (diff) | |
| parent | 60639b3a9ca22b89067124651ff86ab3c81756c1 (diff) | |
| download | rtic-60c14ef680c68593b2cadb24aa086d62973dcad5.tar.gz rtic-60c14ef680c68593b2cadb24aa086d62973dcad5.tar.zst rtic-60c14ef680c68593b2cadb24aa086d62973dcad5.zip | |
Merge #294
294: use the safe DWT::unlock API r=korken89 a=japaric
instead of a unsafe write_volatile call
Co-authored-by: Jorge Aparicio <jorge@japaric.io>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/schedule.rs | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/examples/schedule.rs b/examples/schedule.rs index a1c41ca5..d5de9dbf 100644 --- a/examples/schedule.rs +++ b/examples/schedule.rs @@ -1,9 +1,11 @@ //! examples/schedule.rs +#![deny(unsafe_code)] #![deny(warnings)] #![no_main] #![no_std] +use cortex_m::peripheral::DWT; use cortex_m_semihosting::hprintln; use panic_halt as _; use rtfm::cyccnt::{Instant, U32Ext as _}; @@ -15,8 +17,8 @@ const APP: () = { 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) } + // required on Cortex-M7 devices that software lock the DWT (e.g. STM32F7) + DWT::unlock(); cx.core.DWT.enable_cycle_counter(); // semantically, the monotonic timer is frozen at time "zero" during `init` |