TMS570LS1227: custom_dabort user code side effects

Sonia Borghesi1

Hello,

in my application I would like to put some code into the user code of custom_dabort routine. Specifically, I should put nERROR pin low (writing the ESMEKR register) or, alternatively, implement an infinite loop.

I would like to know if these options would cause side effects.

Thank you for your help,

Sonia

over 5 years ago

+1 QJ Wang over 5 years ago

TI__Guru**** 201486 points

Hi,

The data abort can be caused by uncorrectable RAM ECC error, uncorrectable flash ECC error, or by CPU accessing to an illegal memory location. In the customer abort function, you can insert a infinite loop and print a warning message. When data occurs, you need to stop the code execution and figure out the root cause. You can calculate the illegal memory location using by subtracting 8 from the value in R14 (linker register). Subtracting 8 adjusts for the instruction queue giving you the address of the instruction that caused this exception.

Please see my app note here:

http://software-dl.ti.com/hercules/hercules_docs/latest/hercules/FAQ/FAQ.html#troubleshooting-abort-exceptions

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TMS570LS1227: custom_dabort user code side effects