STM32CubeProgrammer cannot connect to stm32mp157x-DK2 or to custom board, in what configuration should the J-tag/SWD connection work?

[Arnas Celkys]

I have been trying to connect to stm32mp157x-DK2 via on board stl-ink and to my custom board via stlink-v3set, using the STM32CubeProgrammer, but on both boards I get the same error. I have tried selecting engineer and productions mode - no luck. What am I doing wrong? - see a picture bellow

Also why stm32mp157x-DK2 - allows full access via uart to boards memory and custom board does not (see schematics bellow)

1.pic. J-tag error of not detecting MPU on eval-board.

2.Pic. Eval-board st-link schematics.

3.Pic.Custom board - pins that connects to STlink-V3set.

[Tesla DeLorean]

Software looks to be using a ST-LINK V2, not a V3

NJRST != NRST

The NUCLEO board needs to have it's target physically disconnected, for JTAG be specifically aware of SWO/TDO pin as this is not addressed by the SWDIO/SWCLK connection jumpers.

[Arnas Celkys]

The screenshot is the the eval-board yes it's V2 link not V3 - my bad sorry. But the stm32mp157x-DK2 should be able to access the target MPU via ST-link using cubeMxprogramer - in for example engineering mode, or am i misstaken?

[Arnas Celkys]

also to clarify - is it possible to connect to stm32mp157x-DK using SWD/J-TAG using the stm32cubeprogrammer? - I was not been able to find this info anywehre. I can connect to the board via cuveIDE (using J-tag) no problem, but I can do that when using stm32cubeprogrammer..... I am trying to do this to test if my build custom board has all the required debugging peripherals. 

Also I have tried connectin in Engineering and in Production modes, and tried fiddling with options of stm32cubeprogrammer, but no luck :?

[Olivier GALLIEN · Accepted solution]

Hi @Arnas Celkys​ ,

No you can't connect  SWD/J-TAG using CubeProgrammer.

SWD/J-TAG is present only for debug purpose ( so with CubeIDE which is working at your end )

To load program into memory CubeProg can only use USB or UART.

Olivier

[Arnas Celkys]

Got it, thanks! it was my misinterpretation:)

But for example - I have a custom board made, and I want to test that MPU is functional 100%, there is not tool to access it via J-tag and make sure that it works - apart from just using IDE to debug/load firmware?