ARM Coresight Trace Deformatter

.. _cs_trace_defmt:

ARM Coresight Trace Deformatter ###############################

Formatter is a method of wrapping multiple trace streams (specified by 7 bit ID) into a single output stream. Formatter is using 16 byte frames which wraps up to 15 bytes of data. It is used, for example, by ETR (Embedded Trace Router) which is a circular RAM buffer where data from various trace streams can be saved. Typically tracing data is decoded offline by the host but deformatter can be used on-chip to decode the data during application runtime.

Usage

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Deformatter is initialized with a user callback. Data is decoded using :c:func:cs_trace_defmt_process in 16 bytes chunks. Callback is called whenever stream changes or end of chunk is reached. Callback contains stream ID and the data.

API documentation

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.. doxygengroup:: cs_trace_defmt