Cannot unlock flash after commiting earse protection.

Timofey Chashurin

Prodigy 180 points

Other Parts Discussed in Thread: LMFLASHPROGRAMMER, UNIFLASH

Hi. I have protected flash page in Tiva C from earse and write.

I followed the step 6 of the https://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/374640,

1. Unpower the board and press reset

2. Power the board but do not release the reset

3. Run the unlock sequence by the "dialog box"

4. Power Cycle the board and then do a Flash Erase Check

over 9 years ago

0 Chuck Davenport over 9 years ago

TI__Guru 59540 points

Hello Timofey,

You don't specifically state it, but I am guessing that you have protected the flash using the Flash Memory Protection Enable registers as described in the user guide?

Unfortunately, I get an error when trying to follow the link you provided. However, I assume you have tried using the LMFlashProgrammer Unlock utility provided on the "Other Utilities" tab of the application? Normally, this is sufficient to unlock the device and return it to "factory default" status.

0 Timofey Chashurin over 9 years ago in reply to Chuck Davenport

Prodigy 180 points

Yes, thanks, I tried LMFlashProgrammer and Uniflash.

0 Chuck Davenport over 9 years ago in reply to Timofey Chashurin

TI__Guru 59540 points

Hi Timofey,

Given you verified the answer, is safe for me to assume you were able to resolve the issue and unlock the device/protected flash area?

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Cannot unlock flash after commiting earse protection.