ARM Technical Support Knowledge Articles

USING DEBUG TRACE ON ACTEL A2F200 BOARDS

Applies to: ULINK USB-JTAG Debugger

Answer


Information in this knowledgebase article applies to:


SYMPTOM

When using Serial Wire Viewer with the Actel SmartFusion A2F Evaluation board, the Trace data (PC Samples, Timestamps, Exceptions, ITM information) doesn't display.

CAUSE 1

The Core Clock setting for Debug Trace is incorrect.

RESOLUTION 1

For the Actel A2F boards, make sure the Core Clock speed (Options for Target — Debug tab — Settings button — Trace tab) is set to 98KHz (0.098000 MHz).

Note:

CAUSE 2

Some early versions (date code 0936) of the A2F200 device did not output anything on the SWO pin.

RESOLUTION 2

This was fixed in later versions of the A2F200 silicon (date code 0952 or later). Make sure the date code on your device is 0952 or later.

With either of the above resolutions, make sure you are using MDK-ARM version 4.11 or later which has updated projects and Flash algorithms for Actel SmartFusion targets. You may download the latest MDK-ARM version here.

MORE INFORMATION

SEE ALSO

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Article last edited on: 2010-08-18 13:03:36

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