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TMS320F28335: TMS320F28335 Experimenter Kit Not Saving Flash Memory after Power Cycle

Thomas Cook77
Prodigy 30 points

Part Number: TMS320F28335
Other Parts Discussed in Thread: UNIFLASH

Hi TI,

I have a brand new TMS320F28335 Experimenter Kit that I just purchased. I am attempting to program and run a simple PLECs/Simulink model on the board that generates two PWM signals and reads a voltage from a potentiometer with the ADC. When I build and program the model it functions exactly as I expect, with no errors displayed. However, when if I power cycle the board it loses the program and is back to factory settings and I must build/flash the model again. This requires me to always have the board plugged into my computer in order to flash the program every time.  

I've also tried to use CCS  as well as just MATLAB Simulink's C2000 coder (no PLECs) to blink an LED and have the program save to flash (standalone). However after power cycling the board memory is completely wiped again.

Is there a particular setting or jumper configuration required in order for the TMS320F28335  to boot from flash and start running the saved program/model? 

I've attached images of my PLECs coder configuration and Uniflash settings.

Thank you,

Tom

  • 0
    TI__Guru* 87155 points

    Hi Tom,

    How are the boot mode pins configured on your board?  They should be configured for "Jump to Flash" as shown in below table.

    Thanks and regards,

    Vamsi

  • 0 in reply to Vamsi Gudivada
    Prodigy 30 points

    Hi Vamsi,

    Yes the boot mode pins are configured correctly for "Jump to Flash"

    Update to this problem:

    Using an older version of PLECs Coder Standalone (~2018 release) as well as older versions of Code Composer Studio and Uniflash, the development board was able to be programmed correctly and retain its flash memory. Using the most up to date versions of PLECs for MATLAB, CCS, and Uniflash allowed to dev board to only run from RAM and not successfully program it to flash.

    Thanks! 

    Tom

  • 0 in reply to Thomas Cook77
    TI__Guru* 87155 points

    Hi Tom,

    Did you get any errors when trying to program the application in to the flash using CCS or UniFlash?

    I will assign this to our F28335 flash expert to help you further. 

    Please expect a reply in a day or two.

    Thanks and regards,

    Vamsi

  • 0 in reply to Vamsi Gudivada
    TI__Guru* 86150 points

    Tom,

    Based on what is working I'm suspecting there is a difference in the linker(.cmd) file that the older/newer versions of the tool is using.  Since Uniflash/CCS doesn't give errors when trying to load the new code, I suspect that it isn't correctly mapped to flash.  Can you check to see if the linker file that is specified in the newer tool chain is different(or see if you can use the version the 2018 tools did)?

    Best,

    Matthew