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| author |  Jorge Aparicio <jorge@japaric.io>
| 2020-01-21 22:13:23 +0100 |
|---|---|---|
| committer | Jorge Aparicio <jorge@japaric.io>
| 2020-01-21 22:13:23 +0100 |
| commit | 60639b3a9ca22b89067124651ff86ab3c81756c1 (patch) | |
| tree | 9add8deaf2b5350b352b38d20d9723c14a2d15a2 /examples/schedule.rs | |
| parent | 6b0a2df41c024fa8e7da07f3b42a80f19840432e (diff) | |
| download | rtic-60639b3a9ca22b89067124651ff86ab3c81756c1.tar.gz rtic-60639b3a9ca22b89067124651ff86ab3c81756c1.tar.zst rtic-60639b3a9ca22b89067124651ff86ab3c81756c1.zip | |
use the safe DWT::unlock API
instead of a unsafe write_volatile call
Diffstat (limited to '')
| -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 97818e36..8dbe4ab8 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` |