I am building my own stm32f4 boards. The code runs, but I cant get the USB to be recognized by windows - just Device-Not-Recognized. But the same code works on my DemoBoard.
I followed the DemoBoard Schem except for the EMID02USB03F2 chip.
USB connected as :
PA9 - UsbVbusP1
PA11 - /\/\ - UsbDmP2 (res=20R)
PA12 - /\/\ - UsbDpP3 (res=20R)
PA10 - UsbIdP4
GND - UsbGndP5
I still do not have the USB working on my own Boards (while it does work on the Demo Board). And, I followed the Demo Brd Schem explicitly.
Except that I did not add the EMID02USB03F2 chip. Is this neccessary ? - It was not suggested in the Specs.
Anybody have any useful ideas ?