Can STM32H7 chip be directly program with STLink/V2 via SWD ?

[PGama.1]

I have designed a costimazed PCB board based on NECLEO-H743Z12 board, and I have removed the build in STLink debugger, hoping that I will use the external STLink/V2 programmer via SWD. I have followed the schematics data sheet and connected pins [3.3V, GND, TMS, TCK, SWO] directly to H7 chip pins [PA13, PA14, PB3, VDD,GND]. I’m using the STLink software tool to detect the chip but till now I’m constantly getting error messages that the target chip is not detected.

What am I missing, am I doing something wrong ? Is it possible to program this chip directly? and how ? I will really appreciate your help as I’m new and this is my first customize design.

thanks !

[Ansh]

I am using external STLink V2 programmer connecting SWDIO, SCLK and GND

[Ansh]

I am first trying to connect it to stm32 cube programmer

[unsigned_char_array]

Have you tried connecting under reset?

[Ansh]

Yes, but no luck. I am wondering if STlink V3 would be of any help? Currently not available with me to test.

[Mike_ST]

Hello,

Please check these articles, if it can help:

Unable to connect to STM32H7 devices 

How to unbrick an STM32H7 after setting the wrong power mode  

[unsigned_char_array]

it can help to give a power cycle while holding the reset and then connecting under reset

[Ansh]

I am now able to connect to the target, found out my debugger is faulty. But, still facing problem after programming the controller. The program is simple LED toggle. I have checked the power supply configuration HAL_PWREx_ConfigSupply(PWR_DIRECT_SMPS_SUPPLY); The MCU is getting connected only when Boot0=1 after programming it got disconnected. Attached the log of cubeprogrammer.

[unsigned_char_array]

Where did you set your first breakpoint?

[Ansh]

There is no breakpoint in the code

[unsigned_char_array]

Add a breakpoint as early in the code as possible. In SystemInit. And then step through the code.