On 12 March 2017 at 18:23, lamouchi_KARIM lamouchi_KARIM@yahoo.fr wrote:

Hi all,

I want to use STM to debug a platform based on cortex a7 under linux and windows. I want to decode all the packet generated by this component within ETB buffer ,then desplay them in a readebal file. Could you help please?

You can read this [1] first.

In brief, the whole steps should be: 1) Enable STM to collect traces with sysfs command line; For example, collecting function traces of Ftrace subsystem has been supported in mainline v4.10. You can simply try:

a) echo 1 > /sys/bus/coresight/devices/<eft address>.etf/enable_sink b) echo <stm_address>.stm > /sys/class/stm_source/stm_ftrace/stm_source_link c) enable function trace

Then you should see etf/etb is growing.

2) Dump trace buffer(efb/etf) to a file, say "cstraceitm.bin"; 3) Copy the file generated in 2) (e.g. cstraceitm.bin) to a PC 4) Use OpenCSD to decode traces which stored in trace data (cstraceitm.bin)

All the above have been described in [1], feel free to tell me if you have any further question.

Regards, Chunyan

[1] https://www.linaro.org/blog/core-dump/stm-and-its-usage/

Best regards, Karim.

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