How do I unlock my Piccolo? I set the Code Security Module (CSM) password

customer said:

Thank you Jason. I will try it that way too.

I was able to use FlashBurn tool to program the CSM... But not reprogram back to FFFF yet.

I had to ground GPIO37 for me to re-flash the device.

Did you figure out a way to reset back to FFFF?

Also how would we do this in production without giving the password to CM? I figured we can put the password in our application .out file... I tried this by creating an array of 8 words and locating it in csmpasswds symbol from the .cmd file.  Do you have an elegant solution?

I needed to erase sector A to reset the password back to FFFF.  I could not simply unlock and program a new password.

C28xx: Starting device unlocking...
C28xx: Device unlocked. To clear the programmed password, please erase Sector A of Flash memory.
C28xx: Erasing Flash memory...
C28xx: Operation completed successfully.

Reference:

Code Security Module FAQ for C2000 > Q: Is there anyway to erase the password?

Here is how to include the Code Security Module (CSM) password in the .out file for the example above.
    Open this folder
        C:\TI\controlSUITE\device_support\f2803x\v126\DSP2803x_common\source
    Drag this file over your project, "FlashingLeds-F28035 [Active - F2803x_FLASH]," in Code Composer Studio
        DSP2803x_CSMPasswords.asm
    In the dialog box select, "Link to files," and create link locations relative to: PROJECT_LOC
    Open DSP2803x_CSMPasswords.asm and find, "csmpasswds"
    Change the following line
        .int 0xFFFF  ;PWL7
    Change to
        .int 0xFFFE  ;PWL7
    Save the file and debug the example on hardware
    To unlock and reset the password, follow step two from before

 

customer said:

... regarding erasing sector A, did you use code composer studio to unlock and erase?

Yes, but you can also use CCS Uniflash to program, lock, unlock and erase.

1. Program
    File > New Target Configuration(*.ccxml) File
        Connection: Texas Instruments XDS100v2 USB Emulator
        Board or Device: Experimentor's Kit - Piccolo F28035
    Program > Load Program > Browse to FlashingLeds.out

2. Lock
    TMS320F28035 -Texas Instruments XDS100v2 USB Emulator/C28xx > TMS320F28035 > Code Security Password
    Key 7 > Change from FFFF to FFFE (for example)
    Program password (button)
    Lock (button)
    Key 7 > Change from FFFE to FFFF (incorrect password)
    Unlock (button).  This does not work since the password is incorrect.

3. Unlock
    TMS320F28035 -Texas Instruments XDS100v2 USB Emulator/C28xx > TMS320F28035 > Code Security Password
    Key 7 > Change from FFFF to FFFE (for correct password
    Unlock (button).  This works since password is correct.

4. Reset password
    TMS320F28035 -Texas Instruments XDS100v2 USB Emulator/C28xx > TMS320F28035 > Erase Sector Selection
    Erase Flash (button) with Sector A selected.

CCS Uniflash Debug Console said:

[12:13:26] Loaded target configuration from: C:\Users\a0123456\AppData\Local\.TI\1753898293\0\0/temptargetconfiguration.ccxml
[12:15:34] Begin Writing Flash memory operation...
[12:15:34] Loading program: C:\Users\a0123456\workspace_v5_3\2013-02-07\FlashingLeds-F28035\F2803x_FLASH\FlashingLeds.out
[12:15:40] Operation Writing Flash memory returned.
[12:20:12] C28xx: Starting program password operation...

[12:20:13] C28xx: Password programmed successfully. Use the Lock button to lock the device (otherwise, the board will be locked on next connection).

[12:20:27] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[12:20:27] C28xx: Starting device locking...

[12:20:27] C28xx: Device locked with programmed password.

[12:22:03] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[12:22:04] C28xx: Starting device unlocking...

[12:22:04] ERROR >> C28xx: Flash Programmer: Error unlocking flash memory. Device is still locked

[12:22:04] Flash operation Unlock failed on core Texas Instruments XDS100v2 USB Emulator/C28xx !
[12:22:15] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[12:22:15] C28xx: Starting device unlocking...

[12:22:15] C28xx: Device unlocked. To clear the programmed password, please erase Sector A of Flash memory.

[12:24:31] C28xx: GEL Output: Device Calibration not complete, check if device is unlocked and recalibrate.
[12:24:31] C28xx: Erasing Flash memory...

[12:24:33] C28xx: Operation completed successfully.

Hello,

I was looking for some answers and seeing this post I thought that maybe you could halp me.

I have a problem erasing my Flash memory with TMS320F28035. I thought the device was locked but after reading your post I tried to lock en unlock it and it had the same behaviour you described.

So my device is not locked but I can't erase it anymore! Could you help me? It's the fourth device that "lock" itself already...

Thank you.

Regards, 

Simon Brethous

Hi,
I am facing the same Problem as Simon. Is there a way to solve this Problem because as Simon said this is my third device that lock itself.
Best Regards,
Said

Hi Said,

Can you explain your issue in detail in a new post please?

Regards,
Gautam

Hi Gautam,
thank you for your reply. I´ve already started new post here :
e2e.ti.com/.../419494
Regards,
Said

Taken care. Thanks for re-directing.

Regards,
Gautam