Trace Based Measurement; Trigger Modes: Overview - ETAS FETK-S1.1 User Manual

ETAS
4.8

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 FETK-S1.1 via the DAP interface.
The FETK-S1.1 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 FETK-S1.1 to INCA every time the ECU software issues the corre-
sponding trace trigger.
For details on trace trigger (refer to chapter 4.11.1 on page 27).
The FETK-S1.1 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 by-
catch 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.
4.9

Trigger Modes: Overview

The FETK-S1.1 supports the following trigger modes:
• Pinless triggering
• Timer triggering
• Trace triggering by value
FETK-S1.1 - User's Guide
Hardware Description
25