TMS320F28035: Flash_Program works only when debugger is attached

Hendrik May

Part Number: TMS320F28035

Hello,

I get an error using the Flash_Program function for the TMS320F28035. The error code is STATUS_FAIL_PROGRAM (30) and i don't know how
to find the cause.

I am trying to emulate an EEPROM like it is described in "Application Report SPRAB69–September 2009". The error occurs
when entering the Write function defined in F280xx_EEPROM.c

Status = Flash_Program(Page_Pointer,Page_Status,Length,&ProgStatus);

(the status is send inside of a CAN message for debug purposes)

While using the debug mode in the code composer studio on the other hand everthing is working fine.
I can write to the emulated EEPROM without Flash_Program errors ( with debugger attached).

Outside the code Composer Studio the Flash_Program() function is not working inside of the functions found in the
F280xx_EEPROM.c file, but it is working inside of the bootloader. So i don't think that there is a timing problem.

Do you have any idea what could be the cause?

best regards

Hendrik

over 8 years ago

0 Manoj Santha Mohan over 8 years ago

TI__Guru 55700 points

Hendrick,

Can you confirm whether you are able to clear / erase / program when using On-Chip flash programmer (Flash plugin) in CCS?

Regards,

Manoj

0 Hareesh Janakiraman over 8 years ago

TI__Guru* 95315 points

Please take a look at this post and see if it gives you any insight: https://e2e.ti.com/support/microcontrollers/c2000/f/171/p/580852/2132291#2132291

0 Hendrik May over 8 years ago in reply to Hareesh Janakiraman

Prodigy 20 points

Thanks for your help, but finally one of my collegues found the right answer. I was using the example file F280xx_EEPROM_Example.c where you can find the lines

Flash_CPUScaleFactor = SCALE_FACTOR;
Flash_CallbackPtr = NULL;

which are responsible for timing issues of the flash programming. What was missing were the EALLOW and EDIS statements. So changing these lines to

EALLOW;
Flash_CPUScaleFactor = SCALE_FACTOR;
Flash_CallbackPtr = NULL;
EDIS;

solved the problem. It would be a good thing if you changed the example files in the sprab69.zip

Thanks

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TMS320F28035: Flash_Program works only when debugger is attached