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Unable to unlock F28027 flash

gerald garland
Prodigy 190 points
Other Parts Discussed in Thread: CCSTUDIO

I am modifying the code for the Texas Instruments High Voltage Phase Shifted Full Bridge DC/DC Evaluation Kit which uses the F28027.

I have made changes and executed the code from Flash on a Piccolo F28027 controlStick with a target configuration 'Texas Instruments XDS100v1 USB Emulator'.  When I tried running it on the DC/DC Eval Kit, I needed to change the configuration to XDS100v2.

The code loaded and executed as expected on the DC/DC Eval Kit.  I made another modification to the code and tried to run again, however, Flash is locked.  I don't know why it is locked and, more importantly, I don't know how to unlock it since I don't know the code.

thanks Jerry

  • 0
    TI__Intellectual 1560 points

    Jerry,

    It sounds like you might have locked the Code Security Module. If this is the case, we can figure out the password that was inadvertently set by looking at your last .out file (found in your project's Debug directory). Once we have the password, we can unlock the CSM.

    Alvaro

  • 0 in reply to Alvaro Tarazona
    TI__Guru 55700 points

    Jerry,

    Alvaro Prieto is right. It looks like when you programmed the previous code you have locked the device. You won't be able to re-program (or) debug it unless you unlock the device.

    You can use hex2000.exe utility (Path: C:\CCStudio_v3.3\C2000\cgtools\bin) to decipher the password if you have the correct .out file you programmed. This exe should have  been already installed in your computer when you installed CCS.

    Hope that helps.

    Regards,

    Manoj