2025-08-20 11:36 PM
Hello,
I have a Stm32h735g-dk card. I did some work and then the connection was broken. I don't know exactly why it happened later, but I didn't play with the pins, I just threw code with stlink via jumpers and stm32cube ide. Now every time I want to run or debug or connect with stm32programmer, I get a stm32 target not found warning. Currently JP1 is plugged in and stlink is plugged in in the J7 power selection, there is nothing else plugged in. When I connect with STM32CubeProgrammer, the target voltage appears zero, I tried to proceed from here. However, I was not successful. Let me give you the details I saw. When I connect the board from the stlink section with microusb, the power led flashes twice and then stays lit in green. The red led lights up as it is. The white light on the screen flashes in the same way as the led. Also, as you can see in the photo below, it opens with a FAIL.TXT file. when I deleted it, it did not get better. the message written in the file is as follows;
The interface firmware FAILED to reset/halt the target MCU
Note: When I measure between 3.3V and Gnd on CN6, I see 3.3V.
Can you help? Thank you.
2025-08-21 12:26 AM - edited 2025-08-21 12:43 AM
Hello @Yandas
They are several causes for this issue: SMPS/LDO mismatch configuration, wrong configuration of debug pins (SWDIO, SWCLK) ...
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