trace: bump cortex-m, improve order in configure

This commit also adds an unrelated entry to the CHANGELOG I forgot to add.

Author: tmplt

CHANGELOG.md

@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Ignore enters and exits relating to the `ThreadMode` interrupt: RTIC always executes tasks in handler mode and then returns to `ThreadMode` on `cortex_m::asm::wfi()`.
 - Bumped `itm` to v0.7.0 with its `"serial"` feature; the latter used to configure a TTY source.
 - Emit a warning if a DWT watch address used for software task tracing is read. Such an address should only ever be written to. This error would indicate that something has gone very wrong.
+- Crate documentation for `rtic-scope-frontend-dummy`, `cortex-m-rtic-trace`, and `rtic-scope-api` which is now the same as `README.md` used for the organization documentation but with a small header summarizing the crate.
+- Bumped `cortex-m`, ensuring additional target support verification during `cortex_m_rtic_trace::configure`.
 
 ### Deprecated
 

Cargo.lock

@@ -6,7 +6,7 @@
 use cortex_m::peripheral::{
     self as Core,
     dwt::{AccessType, ComparatorAddressSettings, ComparatorFunction, EmitOption},
-    itm::ITMSettings,
+    itm::ITMConfiguration,
 };
 pub use cortex_m::peripheral::{
     itm::{GlobalTimestampOptions, ITMConfigurationError, LocalTimestampOptions, TimestampClkSrc},
@@ -106,22 +106,25 @@ pub fn configure(
         }
     }
 
-    // Configure DCB, TPIU, DWT, ITM for hardware task tracing.
+    // Globally enable DWT and ITM features
     dcb.enable_trace();
+
     tpiu.set_swo_baud_rate(config.tpiu_freq, config.tpiu_baud);
     tpiu.set_trace_output_protocol(config.protocol);
     tpiu.enable_continuous_formatting(false); // drop ETM packets
-    dwt.enable_exception_tracing();
-    itm.unlock();
-    itm.configure(ITMSettings {
+
+    itm.configure(ITMConfiguration {
         enable: true,      // ITMENA: master enable
         forward_dwt: true, // TXENA: forward DWT packets
         local_timestamps: config.delta_timestamps,
         global_timestamps: config.absolute_timestamps,
-        bus_id: None, // only a single trace source is currently supported
+        bus_id: Some(1), // only a single trace source is currently supported
         timestamp_clk_src: config.timestamp_clk_src,
     })?;
 
+    // Enable hardware task tracing
+    dwt.enable_exception_tracing();
+
     // Configure DWT comparators for software task tracing.
     let enter_addr: u32 = unsafe { &WATCH_VARIABLE_ENTER.id as *const _ } as u32;
     let exit_addr: u32 = unsafe { &WATCH_VARIABLE_EXIT.id as *const _ } as u32;