STM32F769 Discovery board - STLink does't detected the main MCU

[Francesco Virlinzi]

Hi

I have an STM32F769 Discovery board (STM32F769I-DISCO) with STLink onboard.

STLink works fine but if I try to run my STM32 application STLink reports the MCU is not detected:

========

Target no device found

Error in initializing ST-LINK device.

Reason: No device found on target.

====

I was able to run only the first time... after that the STM32F7 never responded.

I have an other discovery board (same type) which reports the same issue (STLink doesn't detect the MCU)

Could you help?

Thanks

[ChahinezC]

Hello @Francesco Virlinzi​,

You can try connecting the board using STM32CubeProgrammer and/or erasing the flash and then try reconnecting it.

If this solves your problem, please mark my answer as "Best Answer" by clicking on the "Select as Best" button, this can be very helpful for Community users to find this solution faster.

Thank you.

Chahinez.

[Francesco Virlinzi]

Hi

Sorry but I have still problem.

STM32CubeProgram isn't able to erase the flash because it doens't connect at all:

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 10:18:26:737 : ST-LINK SN : 066DFF504955857567162756

 10:18:26:738 : ST-LINK FW : V2J39M27

 10:18:26:739 : Board    : 32F769IDISCOVERY

 10:18:26:739 : Voltage   : 3.23V

 10:18:26:739 : Error: No STM32 target found!

 10:18:26:779 : Disconnected

====

It seems the STM32F7 is not responding

[AScha.3 · Accepted solution]

try connect with hardware reset + mode 'under reset' .

what you did in your program, that loaded ? change RDP ? access option bytes ?