TMS320F28379D: Running code from flash

Aditya,

It is ITRAP ISR address in BootROM (see Table 4-13. Wait Point Addresses for CPU1 in TRM https://www.ti.com/lit/ug/spruhm8h/spruhm8h.pdf

Please take a look at this FAQ and see if that helps: 

Thanks and regards,

Vamsi

Thanks for the information Vamsi.  I started looking at the reasons for the ITRAP ISR and it looks like initFlash() and Flashoff() functions are not being loaded to the RAM from Flash ( The value in the memory browser is zero for the entire RAM block at LOAD_START).

Everything else looks correct.  Could this also be caused by problems with initialization of variables? The program does not run when I try to run using the debugger too.  It works if I switch to a RAM based configuration instead of Flash.

Thanks,

Aditya

Aditya,

Glad it helped. If they are not copied to RAM, CPU will fetch those locations from RAM and end up in ITRAP.

Please use memcpy() to copy the content from flash to RAM.

Thanks and regards,
Vamsi

Thanks Vamsi,

So it looks like the memcpy() itself doesnt seem to be working properly.  Earlier I was calling InitSysCtrl() which has the memcpy() at the very beginning.  Do I need to call memcpy() separately in  main()  before InitSysCtrl() to copy the RAM?

Thanks,
Aditya

Aditya,

You don't need to call it twice.  Please make sure whether the memcpy() in InitSysCtrl() is getting executed or not by doing single step execution.  Did you check whether _FLASH is defined in your project settings or not?  memcpy() gets called only when this is defined.

Thanks and regards,

Vamsi

Thanks for this suggestion.  I realized the main() function itself is not getting executed and so it is not able to to the InitSysCtrl() to load other functions to RAM.  I will search for errors with that and I think that should be able to solve the flash code not being copied issue.

Thanks again,
Aditya

Thanks again for all the suggestions.

Aditya