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USB Joystick mouse: USB_Istr(); doesn't run: enumeration failed

Question asked by gafsos Employee on Mar 19, 2012
Latest reply on Mar 19, 2012 by gafsos
Hello;
I'm working on USB Joystick demo. It cant' run to this USB interruption, I mean when I set a breakpoint it does not work. 
void USB_LP_IRQHandler(void)
{
  USB_Istr();
}

I have some questions, I'm new be in USB, and I need your help

1/ Which Step to follow when Enumerations fails, I need to khnow the steps for debugging.
2/ In this case How can I run interruption ?

Big Thanks
g@fsos

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