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TMS320F2800137: DCSM

youjun zhang
Intellectual 570 points
Part Number: TMS320F2800137
Other Parts Discussed in Thread: UNIFLASH

Tool/software:

hi expert:

when i used CSM Passwords,using dcsm module .

i can read the data in ccs as follow,why the read data is not zero?

  • 0
    TI__Mastermind 23470 points

    Hi Youjun,

    Can you confirm that you've programmed custom CSM passwords at address 0x78020? Can you send a screenshot of the memory browser at this location?

    If you have provided your CSM passwords in the On-Chip flash tool, this may unlock the device upon an emulator reset, resulting in the memory being unsecure.

    You also need to designate memory locations as secure in the DCSM tool in addition to programming custom CSM passwords.

    Thank you,

    Luke

  • 0 in reply to Luke Jones
    Intellectual 570 points

    the linkpointer is 0x3FFE.

    how can i confirm the flash sector(i want to lock) is locked?

  • 0 in reply to youjun zhang
    TI__Mastermind 23470 points

    Hi Youjun,

    You have not programmed custom CSM passwords. This is necessary for the zone to become locked. When the zone is locked, you will see all 0s in the USER OTP and any secured memory regions.

    Thank you,

    Luke

  • 0 in reply to Luke Jones
    Intellectual 570 points

    I have programmed custom CSM passwords,the default value is FFFFFFFF,I set the value FFFFFFFE;

    when i used the ccs debug,should enter the SM passwords,Otherwise, it cannot be linked by ccs.so the read data is not all 0s.

    how can i see the all 0s data?

    when i used the uniflash to read the data , the code is halt,such as the led is not twinkled?why?

  • 0 in reply to youjun zhang
    TI__Mastermind 23470 points

    Hi Youjun,

    If you enter the CSM passwords in the CCS On-Chip flash tool and do a debugger reset the zone will become unlocked.

    You can relock the zone by pressing the "Lock" button in the GUI

    Are you using wait boot mode or boot from flash? If booting from flash, the debugger will become disconnected whenever the program counter is in secured memory. You must use wait boot and unlock the zone or perform an ECSL unlock to prevent this.

    Thank you,

    Luke