Skip to main content
E
Evan .1
Visitor II
May 13, 2020
Solved

Nucleo-H7A3 Error: No STM32 target found!

  • May 13, 2020
  • 3 replies
  • 1877 views

I'm trying to get a nucleo-H7A4 getting to run my code.

Only I got this message now:

     -------------------------------------------------------------------

                      STM32CubeProgrammer v2.4.0                 

     -------------------------------------------------------------------

ST-LINK SN : 003A001A3038510234333935

ST-LINK FW : V3J6M2

Voltage    : 3.31V

Error: No STM32 target found!

2nd connect tentative with a lower frequency (8MHz)

ST-LINK SN : 003A001A3038510234333935

ST-LINK FW : V3J6M2

Voltage    : 3.30V

Error: No STM32 target found!

Encountered Error when opening C:\ST\STM32CubeIDE_1.0.2\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.cubeprogrammer.win32_1.3.0.202002181050\tools\bin\STM32_Programmer_CLI.exe

Error in STM32CubeProgrammer

Debugger connection lost.

Shutting down...

Is the device now bricked? Any how is this possible with only programming flash?

    This topic has been closed for replies.
    Best answer by PMath.4

    I've had precisely this problem.

    Solution is to connect BOOT0 high. Then power on. Connect a second USB cable to CN13. Run STM32CubeProgrammer and connect over USB - not ST-LINK. You should get a connection. Then erase all memory on the H7A3. Power off. Remove BOOT0 connection. Power-on and you should find ST-LINK works again.

    Why? - Who knows - a bug in ST-LINK V3?

    3 replies

    U
    Uwe Bonnes
    Graduate II
    May 13, 2020

    Try connect under reset.

    E
    Evan .1Author
    Visitor II
    May 13, 2020

    I did, the device doesn't start programming when the reset button is pressed.

    When I release the reset button I got the same error message.

    P
    PMath.4Answer
    Visitor II
    May 13, 2020

    I've had precisely this problem.

    Solution is to connect BOOT0 high. Then power on. Connect a second USB cable to CN13. Run STM32CubeProgrammer and connect over USB - not ST-LINK. You should get a connection. Then erase all memory on the H7A3. Power off. Remove BOOT0 connection. Power-on and you should find ST-LINK works again.

    Why? - Who knows - a bug in ST-LINK V3?

    E
    Evan .1Author
    Visitor II
    May 13, 2020

    Thanks!. That solved it.

    K
    Kier
    Visitor II
    February 13, 2025

    A possible explanation (and slightly simpler remedy) for this is mentioned in the manual, section 7.4.8:

    https://www.st.com/resource/en/user_manual/um2408-stm32h7-nucleo144-boards-mb1363-stmicroelectronics.pdf

    The remedy on page 26 can be interpreted as just:

    - Connect CN11 pins 5 (BOOT0) and 7 (VDD).

    - Start Cube Programmer with USB cable attached to CN1 as you would normally.

    - Full Chip Erase

    - Power down.

    - Disconnect CN11 pins 5 and 7.

     

      Terms & ConditionsAccessibility statement