Update migration guide to include the enabling of the the DWT peripheral. Also makes note of enable trace with the DCB to allow the DWT to work without a debugger connected.
@@ -192,7 +192,9 @@ the `monotonic = rtfm::cyccnt::CYCCNT` argument to the `#[rtfm::app]` attribute.
Also, the `Duration` and `Instant` types and the `U32Ext` trait have been moved
into the `rtfm::cyccnt` module. This module is only available on ARMv7-M+
-devices.
+devices. The removal of the `timer-queue` also brings back the `DWT` peripheral
+inside the core peripherals struct, this will need to be enabled by the application
+inside `init`.
Change this:
@@ -217,6 +219,12 @@ use rtfm::cyccnt::{Duration, Instant, U32Ext};
#[rtfm::app(/* .. */, monotonic = rtfm::cyccnt::CYCCNT)]
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
const APP: () = {
+ #[init]
+ fn init(cx: init::Context) {
+ cx.core.DWT.enable_cycle_counter();
+ // optional, configure the DWT run without a debugger connected
+ cx.core.DCB.enable_trace();
+ }
#[task(schedule = [b])]
fn a(cx: a::Context) {
// ..
