stm32h735g-dk not detecting in stm32 cube programmer

[Jnanika]

Hi, 

I am using STM32h735g-dk development board, STM32CubeProgrammer and ST link to flash the development board. 

I tried to flash program the development board using the ST link and STM32CubeProgrammer. Once, it got programmed, but after some time, I tried to program the same board again using the USB cable with the onboard ST link programmer; it did not get programmed.

Now its giving me this below error in STM32 Cube Programmer and its not getting connected.

"15:56:35 : UR connection mode is defined with the HWrst reset mode
15:56:40 : ST-LINK error (DEV_USB_COMM_ERR)
15:56:40 : Error: Problem occurred while trying to connect" 

Checked on the device manager, and there on ports "board is not getting detected" but is showing me on the Universal Serial bus devices. Screen shot attached below for your reference.

And check on STM32 Cube IDE, here also the same issue is "No device found". 

Kindly let me know, what would be the issue and please revert me back if there are any additional information needed and i will be mentioning my email below for further communication in case of any need. 

email - jnanikat@gmail.com

[SofLit · Accepted solution]

Hello @Jnanika and welcome to the community,

Most probably you programmed your MCU with the wrong power supply. STM32h735G-DK board is configured by HW in SMPS, and you maybe configured it in your application in LDO:

See this thread: https://community.st.com/t5/stm32-mcus-products/bricked-after-first-debug-stm32h735g-dk/td-p/231942

So if it's the case you need to recover your MCU from this situation. Please review that article.

[Andrew Neil]

https://community.st.com/t5/stm32-mcus/how-to-solve-debugger-connection-issues/ta-p/49693

Note that this is a public forum - visible to anyone & everyone on the entire internet - so you might not want to publish your email address in posts here ...

[SofLit]

Hello @Jnanika ,

Were you able to solve your issue? 

Thank you.