Expand description
DWT-based framing instrumentation (enabled by the profile feature).
Accumulates cycle counts and byte counts for each COBS encode/decode
operation in process_frame. The counters are stored in module-level
statics so they survive across multiple poll() calls.
Call init_dwt once at startup (done automatically by
[TelepathServer::new] when profile is enabled) to enable the
Cortex-M DWT cycle counter.
Retrieve and atomically reset all counters by calling
snapshot_and_reset, or equivalently by sending CmdID 0xFFFE
(CMD_ID_METRICS) from the host.
Constants§
Functions§
- cycles_
now - Read the current DWT cycle counter value. Returns 0 on non-ARM targets (e.g. x86_64 host-pty-server).
- init_
dwt - Enable the Cortex-M DWT cycle counter.
- snapshot_
and_ reset - Return the current metrics snapshot and atomically reset all counters.