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yellowtomato
Visitor II
May 26, 2021
Solved

STM32F722ZE Error: Mass erase operation failed. Please verify flash protection. STM32F722ZE

  • May 26, 2021
  • 12 replies
  • 16771 views

I debuged my software on the STM32F722ZE, when I suddenly lost connection to it. I tried to connect to it with ST-Link V2 and Segger J-Link.

Error message from J-Link commander is: Can not attach to CPU. Trying connect under reset. Connecting to CPU via connect under reset failed.

Error message from ST-Link V2: Error finishing flash operation. Failed to erase memoy.

See picture: 0693W00000APoBiQAL.pngI then took a look at the config with CubeProgrammer:

0693W00000APo8yQAD.pngHow is it possible to have 0xFF as RDP Byte?

0693W00000APoCHQA1.pngWrite protection is not active are all checked.

When I try to perform a mass erase I get Error: Mass erase operation failed.

How can I recover from this? Is it possible that I locked myself our by acciedent? I would say it is rather unlikely to do this while debugging. What else could have happend?

Thank you in advance for every answer.

0693W00000APo8oQAD.png

    This topic has been closed for replies.
    Best answer by Zaher

    I just encountered the same error when I was trying to do "Erase Chip" from within CubeProgrammer. I have the latest version downloaded yesterday. This was on the STM32H747-DISCO board with STLink-V3.

    Error message: "Mass erase operation failed. Please verify flash protection" but no protection has been applied to any sector of the flash whatsoever. I did full chip erase/programming dozens of times yesterday, but suddenly today it didn't work out. After spending some time trying to figure out what happened, I found that the problem lies in the FW of the STLINK. One of the demo projects opened in the IDE asked me to upgrade its firmware, which I did. After that, the problem appeared.

    Here's what I did to solve it:

    1- Open ST-Link Utility

    2- From ST-LINK drop down menu go to > Firmware update

    3- Click on Device Connect

    4- Make sure MCO output is set to "Default (HSI/2 8MHz)

    5- Click "yes>>>>" to upgrade FW and restart the tool

    That's it. Now, I can do full chip erase in both of ST-Link Utility and CubeProgrammer.

    Zaher

    12 replies

    Show previous replies
    G
    GF Ho.1
    Visitor II
    April 4, 2023

    Hold Reset button while Connecting to the device in cubeprogramer. then full erase the internal flash. if using external flash use a programe that implement full chip erase.

    E
    EveRed
    Explorer
    August 21, 2023

    One of my STM32F730Z8T6 got corrupted for a mysterious reason and I get the "Mass erase operation failed. Please verify flash protection" when I try to erase it with:

    STM32_Programmer_CLI -c port=SWD freq=4000 --erase all

    This used to work on the same device. I toggled the RDP protection level option byte to 0xBB and back to 0xAA, to get my memory back in read/write mode, but the issue persists.

    Oddly enough, clearing the memory by blocks still works perfectly ("Existing specified sectors are erased successfully. Protected sectors are not erased")

    STM32_Programmer_CLI -c port=SWD freq=4000 --erase 0 1 2 3

     

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