Riverdi_101 STM32H7: ST-Link can't connect to board

[richi]

For more than 3 days I am trying to solve a problem of connecting to Riverdi board using external ST-link from a discovery board. I flashed apps without problem and now I can't do anything. I remember last time I was flashing an app it asked that firmware of St-link has to be updated before continuing so I proceeded. I successfully flashed the app but now I am unable to flash it again. 
 

13:07:23 : STM32CubeProgrammer API v2.18.0 | Windows-64Bits
13:07:27 : UR connection mode is defined with the HWrst reset mode
13:07:27 : ST-LINK SN : 0670FF3332584B3043153854
13:07:27 : ST-LINK FW : V2J45M31
13:07:27 : Board : STM32F4DISCOVERY
13:07:27 : Voltage : 2.91V
13:07:27 : Error: Unable to get core ID
13:07:27 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

If I try to connect to other boards It is connected without problem.
Please help,

Regards

[SofLit]

Hello,

Which board? in the title you said: "STM32H7 cant connect to board"

but the log said: Board : STM32F4DISCOVERY

Could you please clarify? do you have a F4 discovery board connected via USB to your PC?

[richi]

That is the weird thing , this is the ST-link from F4 discovery board, I removed the jumpers to use only ST-link. I performed connect under Reset and performed full chip erase. However, flashing is still not possible. 

[SofLit]

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@richi wrote:

That is the weird thing , this is the ST-link from F4 discovery board,

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Not clear. Are you using a STLINK module from F4 discovery to connect to that Riverdi board? If yes that was an important information you should provided in the first post.

[Andrew Neil]

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@richi wrote:

 this is the ST-link from F4 discovery board. 

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That'll be why it shows up as "F4Discovery"

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@richi wrote:

I removed the jumpers to use only ST-link.

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Show your schematic of how you connected between the Discovery board and the Riverdi board.

Did you remember to connect GND and Reset?

[richi]

Riverdi board only offers block diagram:

On the stm32f4 side I just removed jumpers and connected pins 2,3,4,5,6 , VCC is given from an external power supply on through a power connector. 

I was reading on internet that MCU could be bricked if I accidentally re-configured SWD pins for some other alternate function, what is the procedure if that is the case?

[Andrew Neil]

None of that shows us the actual connections that you have made between your disco & riverdi boards.

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@richi wrote:

I was reading on internet that MCU could be bricked if I accidentally re-configured SWD pins for some other alternate function

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Not really "bricked" - but inaccessible to SWD.

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@richi wrote:

what is the procedure if that is the case?

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1. Connect under hardware reset.
   That's why I asked if you'd included reset in your connections.
    
2. Use the System Bootloader (requires manipulation of BOOTx pins)

[richi]

Can you please tell me how can I flash a program from STMCubeProgrammer but with 2 hex files. One is for internal flash starting at 0x08000000 and one for external flash 0x090000000, earlier I would just click on flash in TouchGFX and everything would be done automatically. 

[Andrew Neil]

That's a separate question - you need to be able to connect to the board first!

Have you now got the connection working?