Trace based measurement

Note
Only the BR_XETK-S3.0A supports trace based measurement.

The microcontroller ability to send trace messages is used to forward any write access to measurement data to CPU internal buffer (Trace2Ram / Trace to RAM). This buffer is automatically read by the BR_XETK-S3.0 via the DAP interface.

The BR_XETK-S3.0 combines the processing of this data trace messages with an initial direct read of the configured measurement data to an always up to date mirror of the measurement data in the ECU. The current values will be sent from the XETK to INCA every time the ECU software issues the corresponding trace trigger.

For details on trace trigger, see Trigger modes.

TheBR_XETK-S3.0 does the complete configuration of the microcontroller for trace based measurement. No ECU software is required for the configuration.

As trace based measurement has to transfer trace data, address and some bycatch via DAP interface it is less efficient compared to DISTAB17 non-trace measurement regarding DAP interface usage. But it has lower impact on ECU runtime and faster rasters are possible.