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emil28
Visitor II
November 26, 2020
Question

Error: Data mismatch found after programming L433 through USB

  • November 26, 2020
  • 1 reply
  • 926 views

Hello,

I have created a DFU project with CubeMX in order to update the STM32L433CCU6 on my custom board through USB. The board is recognized by CubeProgrammer:0693W000005CkRHQA0.jpgThe USBD_DFU_APP_DEFAULT_ADD is 0x8008000. Then, I have created a project to simply turn on a LED. I have changed the Flash_Based value (0x8008000) and the icf file. The problem occurs when I upload the file to the uC using Cube Programmer. The update looks ok, but there is an error during the verification process:

0693W000005CkMcQAK.jpgYou can find attached both ioc files: the DFU bootloader and the application. Is there something I am missing or I am doing wrong ?

Thanks for your help.

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    1 reply

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    emil28Author
    Visitor II
    November 26, 2020

    Hello,

    I partialy found the solution. Cube MX generates empty Read/Write/Erase functions in usbd_dfu_if.c, so I copy paste the code from another similar file from CubeL4 library, and now, the DFU works ! But just once... When I unplug my board and plug it again with USB, I can't update it through USB, I have the following error in Cube Programmer:

    0693W000005CnjiQAC.jpgThe DFU process works ONLY if: 1) I do a mass storage erase with Cube Programmer and STLink plugged, 2) I download the DFU bootloader generated with CubeMX. After that, I can update my application, but once...

    Any idea ?

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