message from Error_Block in Sysbios

robert7281

Other Parts Discussed in Thread: SYSBIOS

Hi,

I got a question from my customer who're using Sysbios in their application based on c66 DSP. They had a DSP crash issue after running their code for a while. To debug this issue, they added a hook function thru the way that Error.raiseHook = "&ErrHookFun" and printed the message of Error_Block. They found the msg is "E_exceptionMin: pc = 0x .....". Since I'm not familar with this kind of msg, could you tell me what this error means? How to use this info to debug the DSP crash problem?

Thanks!

Robert

over 12 years ago

0 Yokoyama, Atsushi over 12 years ago

TI__Expert 7180 points

Hi Robert,

I don't exactly remember the message "E_exceptionMin: pc = 0x .....", but the following page does not help?

http://processors.wiki.ti.com/index.php/SYS/BIOS_FAQs#4_Exception_Dump_Decoding_Using_the_CCS_Register_View

Regards,
Atsushi

0 Ashish Kapania over 12 years ago

TI__Mastermind 21645 points

Hi Robert,

"E_exceptionMin: pc = 0x ....." is printed if you have enablePrint turned off for the exception module. You can think of it like a non-verbose mode. In order to get more information about the exception you can enable printing. Here's a screenshot that shows how to do this:

Once you enable prints you will get a register dump including the PC. That should be useful in determining where the error occurred.

Best,

Ashish

0 robert7281 over 12 years ago in reply to Ashish Kapania

TI__Prodigy 250 points

Hi Ashish,

I've checked the source code of Sysbios and found the print info comes from Exeception_module->excContext. So I use Exeception_module->excContext in my code to dump register values. However, this pointer is zero when the exception occured. My hw platform is 6614 EVM. Anything else I should pay attention to? Thanks for your suggestion!

Robert

0 Ashish Kapania over 12 years ago in reply to robert7281

TI__Mastermind 21645 points

Hi Robert,

Looking back at your original post, I see that you are installing an error raise hook. Are you trying to read the exception context from this hook function ? Can you post or mail me the code you have added to access the exception context ?

I would like you to try something. Can you select "Enable Print" in the Exception module using the cfg file (Screenshot in my last post). This should print the excContext without you having to read the structure and print it.

Best,

Ashish

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message from Error_Block in Sysbios