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STM32 USB Communication ISSUE(communication device class)

Question asked by park.dongsoo on Jul 11, 2016
Hello,
I have some problem to USB communication.




Hello,
I have some problem to USB communication.


when I tested USB communication device class, my computer was shutdown and reboot.
so I checked the dump memory, but I don't know what this means.


I think this is not the hardware issue or PC application.
because I replace the PC, target  Boards(STM32F4Discovery) even replace the MCU(STM32F103).
but when I uses 8051 and UART bridge, it works well.


so I suspects the firmware or usb driver.


please review my problem.


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Test Environment
Target Board: STM32F4Discovery


STM32%20usb%20communication%20crash.gif

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