MPLAB ICE 4 In-Circuit Emulator User's Guide

5.7.2 How ITM/SWO Trace Works

The CoreSight Instrumentation Trace Macrocell (ITM) block is a software application driven trace source. Supporting code generates SoftWare Instrumentation Trace (SWIT). In addition, the block provides a coarse-grained timestamp functionality. The main uses for this block are to:

support printf style debugging.
trace OS and application events.
emit diagnostic system information.

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