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TMS570LS1227: Prefetch abort with F021 library

Part Number: TMS570LS1227
Other Parts Discussed in Thread: TMS570LS0714

Hi,

i am having problems exactly the same as in the thread "TMS570LS0714: F021 operation will abort prefetch while allow FIQ interrupt" (can't provide a direct link due to faulty ti forum software).  It's marked by ti as "resolved" but as far as I can see there was f..k all resolved.

When I single step through the F021 functions running in RAM everything works perfect.   When I run the code it fails with a prefetch abort.   I have no FIQ enabled which would require the flash bank I am erasing.

I had a look at the sample bootloader software provided by ti and used parts of the linker script and the copy to ram function which worked after I corrected a major fault in it (the linker script I could have never figured out myself; is there actually documentation available from ti?).

So why is the software working when single stepping and why does it crash when free running?   Implementation is exactly as per ti document SPNU501H.

Any ideas what makes F021 software crash?

Regards,