WRT and CPRT in Trace Receiver Settings

Lencho DeLeon

Prodigy 80 points

Other Parts Discussed in Thread: OMAPL138

Hi,

There are some terms/definitions we cannot find in TI documents or web.

For tracing an omapl138 chip using ETB,

Questions without answer:

“wrt” in “Trace Condition wrt trigger”, what is “wrt”? Maybe it is a short for something?
The pull-down menu: what does “before”, “after” and “about” mean? Say if we run to a breakpoint, the basic understanding is that ETB is going to collect PC during the last run in its circular buffer, so perhaps it is more close to “(immediately) before”? Then what about the other two options?
CPRT and “monitor CPRT” is also undocumented.

Questions with probable answer:

“Suppress Data on FIFO full”. I guess this is equivalent to the old “circular” option as (1.2.1 Stop on buffer full and 1.2.2 Circular buffer)
“Stall CPU”, likely as1.1 ETB Trace System Control.
“Cycle Accurate Tracing”, likely 8.1 Cycle Accurate Trace Profiling with CCS Examples

Please advise us with the primarily the unknown questions, and confirm the remaining.

Lencho

over 10 years ago

0 Sivaraj Kuppuraj over 10 years ago

TI__Mastermind 35645 points

Hi,

Thanks for your post.

In my understanding, you need to decode trace data and to decode trace from a binary dump of the ETB memory, two tools are avaialble, one is Bin2TDF utility and the other is TD utility which are the traditional debug methods to trace the failures, but this is difficult in investigating intermittent and real-time failures. To know more info. on utilities, please see below:

http://processors.wiki.ti.com/index.php/BIN2TDF

http://processors.wiki.ti.com/index.php/TD

ETB is an on-chip circular memory buffer where the compressed trace information is stored and to get started with CCS Embedded Trace Buffer (ETB) Trace tooling, please refer below:

http://processors.wiki.ti.com/index.php/Embedded_Trace_Buffer#How_to_get_started_with_CCS_Embedded_Trace_Buffer_.28ETB.29_Trace_tooling

if it is a hardware JTAG connectivity issur or a software ETB setup configuration issue. If any JTAG connectivity issues, you could debug JTAG connectivity

http://processors.wiki.ti.com/index.php/Debugging_JTAG_Connectivity_Problems

If any software issue, please validate the ETB setup configuration in your software code and the reference code snippet for setup ETB receiever, dump_ETB and exporting the data are shown on the wiki below:

http://processors.wiki.ti.com/index.php/Capturing_ETB_Trace_Data_With_ETBLib#main.28.29

In order to capture data in trace buffer, we need to initialize the ETB and the DSP trace hardware. Also, you need the AET unit to trigger trace on and off and we need to program AET to turn trace on and off at the appropriate points, thereby, ETB will capture data. So, could you please validate setting up the ETB receiver, AET programming and later dumpEtb( ) call to move the ETB data to memory.

Thanks & regards,

Sivaraj K

---------------------------------------------------------------------------------

Please click the Verify Answer button on this post if it answers your question.

---------------------------------------------------------------------------------

Processors

Processors forum

WRT and CPRT in Trace Receiver Settings