How to debug excStack in Hwi_excHandler

Yan Li29

Hi, I have code deployed in a TIVA microcontroller in the field. I am running into a problem right now where the TIVA gets an exception and lands in Hwi_excHandler. I am able to retrieve the unit from the field so I can connect to the TIVA using JTAG, load symbols using the .out file, and look at the TIVA memory. Is there a way to trace the execution stack and find out what function was running prior to the exception? Thanks.

over 9 years ago

0 Chuck Davenport over 9 years ago

TI__Guru 59540 points

Hello Yan,

Generally speaking, this is a question for the TIRTOS forum. They should be able to provide some input as to what might be the best way to narrow down the source of the exception. If, in the end, it is a TM4C issue with the hardware, please come back and we will address the issue directly.

0 Yan Li29 over 9 years ago in reply to Chuck Davenport

Expert 1015 points

Chuck,

Has this post has been moved to TI-RTOS forum? Just want to confirm as I was about to create the same post in the TI-RTOS forum.

Thanks

Yan

0 Chuck Davenport over 9 years ago in reply to Yan Li29

TI__Guru 59540 points

Hi Yan,

Yes, it is in the TI-RTOS forum now. You should have received an email when it was moved.

0 ScottG over 9 years ago in reply to Chuck Davenport

TI__Mastermind 26780 points

Yan,

I was just typing you a response when your new post arrived.

If you open ROV (Tools->RTOS Object View (ROV)) you may be able to view the callstack to see where the exception occurred.

Or, you can follow these instructions to recreate the call stack by copying the PC, SP, and LR register values from the exception log into the corresponding CPU registers: processors.wiki.ti.com/.../BIOS_FAQs

Depending on your configuration, you may be able to see these values printed in the System_print buffer via ROV. For example, if you are using the SysMin provider, you can navigate in ROV to xdc.runtime.SysMin, and click on the OutputBuffer tab.

Does this help?

Regards,
Scott

0 Yan Li29 over 9 years ago in reply to ScottG

Expert 1015 points

Thanks Scott. I'll try that out.

Yan

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How to debug excStack in Hwi_excHandler