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How to unlock protection with CCSV6

Wing Lam39
Prodigy 20 points

Other Parts Discussed in Thread: TMS320F2812

The target was locked (TMS320F2812)  by a password. How to unlock the target with CCS6.

When I start to debug, the following error is shown:

"0C28xx: Flash Programmer: Device is locked or not connected. Operation cancelled.

C28xx: GEL: File: C:\A_CCS6.0_Project\FL4000_OriginalFirmware_CCS6.0\FLIR\Debug\FL4000.out: Load failed."

I am sure that the target is connected, because "Test Connect" is working, and the program was down load successfully a minute ago with the protection enabled with password.

  • Guru 192875 points

    Hi,

    Wing Lam39 said:
    The target was locked (TMS320F2812)  by a password. How to unlock the target with CCS6.

    If you check the SysCtrl.c source file in your project, it has a CSM_Unlock routine and it looks something like this:

    Uint16 CsmUnlock()
{
    volatile Uint16 temp;

    // Load the key registers with the current password. The 0xFFFF's are dummy
    // passwords.  User should replace them with the correct password for the DSP.

    EALLOW;
    CsmRegs.KEY0 = 0xFFFF;
    CsmRegs.KEY1 = 0xFFFF;
    CsmRegs.KEY2 = 0xFFFF;
    CsmRegs.KEY3 = 0xFFFF;
    CsmRegs.KEY4 = 0xFFFF;
    CsmRegs.KEY5 = 0xFFFF;
    CsmRegs.KEY6 = 0xFFFF;
    CsmRegs.KEY7 = 0xFFFF;
    EDIS;

    // Perform a dummy read of the password locations
    // if they match the key values, the CSM will unlock

    temp = CsmPwl.PSWD0;
    temp = CsmPwl.PSWD1;
    temp = CsmPwl.PSWD2;
    temp = CsmPwl.PSWD3;
    temp = CsmPwl.PSWD4;
    temp = CsmPwl.PSWD5;
    temp = CsmPwl.PSWD6;
    temp = CsmPwl.PSWD7;

    // If the CSM unlocked, return succes, otherwise return
    // failure.
    if (CsmRegs.CSMSCR.bit.SECURE == 0) return STATUS_SUCCESS;
    else return STATUS_FAIL;

}

    Regards,

    Gautam