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Problem " ST LINK not detected " PIN2DMD


pticolu

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Hi,
 
I am encountering a problem installing my PIN2DMD, which I bought on "smallcab.net" several months ago. During my first installation test, I got my .key activation file from Lucky01.
But here it is, several months have passed and I decided a few days ago to resume the installation but I must have made a mistake:
When I plug the DMD, the leds don't light up and the STM32 card is not recognized by the software " ST LINK " as shown on the attached picture. It is therefore impossible for me to flash the card with the right firmware.
What annoys me the most is that my PC mocks me when I go to the tab to "safely remove the device", because the card is well recognized and well named, as in the attached picture 2...
I'm wading a bit and in this case, the installation tutorials are of no use to me since I can't get through the first installation step about the firmware.
Model: STM32F407G
Shield: v2.3
 
Would you have a solution to bring me please ? I would be grateful.
 
Thank you very much in advance!
 
Best regards,

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