Matter tracing provides a tool for applications to trace information about the execution of the application. It depends on pw_trace module.
Application can override trace events with custom trace system by setting MATTER_CUSTOM_TRACE to true and direct trace macros to trace/MatterCustomTrace.h.
${chip_root}/src/trace
as deps in BUILD.gn.#include "pw_trace/trace.h" void SendButton() { MATTER_TRACE_EVENT_FUNCTION(); // do something } void InputLoop() { while(1) { auto event = WaitNewInputEvent() MATTER_TRACE_EVENT_SCOPE("Handle Event"); // measure until loop finished if (event == kNewButton){ SendButton(); MATTER_TRACE_EVENT_END("button"); // Trace event was started in ButtonIsr } else { MATTER_TRACE_EVENT_INSTANT("Unknown event"); } } } void ButtonIsr() { MATTER_TRACE_EVENT_START("button"); SendNewInputEvent(kNewButton); }