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STM32F4 DiSCOVERY's micro usb port doesn't work

Question asked by Marton on Dec 29, 2014
Latest reply on Dec 30, 2014 by Clive One
I have an STM32F4Discovery board (STM32F407VGT6) and about a half year I created a program which communicate via micro usb between the board and the computer. Now When I run again that program, (maybe newer atollic studio), it sad, I need to upgrade the firmware, I did it. But now the windows can't recognize the micro usb port. The mini usb which you use to programming the board, it works. I tried 3 different Win7 PC, 3 usb cable with 2 board and nothing. (and this code worked!) Why is this? I need to solve ASAP this...

Normally the windows need to say, "I looking for driver for XY device" but I get "the windwos can't recognize the usb device". Why?

Now the firmware version is: V2.J20.S0

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