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STM32f4 discovery USB device example

Question asked by Ed Sutter on Aug 26, 2013
Latest reply on Sep 10, 2013 by Clive One
Hi, I'm trying to run the "USB Device VCP example" using the gcc (sourcery-lite) tools.  I can build it and it appears to be running (led is blinking and the message "USB device library started" comes out the UART; but then I get "Unknown Device" on the USB side when I plug it into a PC.  
Has anyone built any of the USB device demos with GCC?