Error to connect to target STM32H747I-DISCO

[Ericson Joseph]

I try to connect to target STM32H747I-DISCO but show this message:

08:58:19 : ST-LINK SN : 004800413137510D39383538

08:58:19 : ST-LINK FW : V3J3M2

08:58:19 : Voltage : 3.27V

08:58:19 : No STM32 target found!

08:58:20 : ST-LINK SN : 004800413137510D39383538

08:58:20 : ST-LINK FW : V3J3M2

08:58:20 : Voltage : 3.27V

08:58:20 : Error: No STM32 target found!

And the file in FAIL.TXT with:

The interface firmware FAILED to reset/halt the target MCU

how can I solve that?

[Tesla DeLorean]

Sounds like an issue with LDO/SMPS or VOS settings.

Topic covered previously.

Likely will need to jumper BOOT0 HIGH and cycle power several times until you can access flash and erase errant code.​

[Ericson Joseph]

Thanks you very much,

In STm32H747I-DISCO the BOOT0 is connect to R192 and this one to + 3.3V. View image

Solved.

[Tesla DeLorean]

Yes, sorry was responding on phone earlier, too hard to track down and paste links

https://community.st.com/s/question/0D50X0000Bh5aWoSQI/stm32h747-discovery-kit-not-debugprogrammer

Having bricked my board within having it a few minutes running H743 code I know the issue. I had advised ST (perhaps 18+ months ago) to have a top-size/user jumper on this because it was such a PITA to deal with.

[Tesla DeLorean]

STM32H735G-DK

Related https://community.st.com/s/question/0D53W00000LeYL1SAN/get-stm32h735gdk-out-of-deadlock