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RTOS/TM4C1294NCPDT: How to debug an IMPRECISERR hardfault?

Part Number: TM4C1294NCPDT

Tool/software: TI-RTOS

Sometime an IMPRECISERR hardfault could occur in my application. I heard it could be forced to a PRECISERR by setting a CPU register bit to disable write buffer, but I couldn't find it in CCS register window.


Please give me some advice on how to set it in CCS and/or code.

Also can we know how much performance will be affected by disabling write buffer?

Thanks