void USB_Reset(void)
{
	EP_INDEX=0;
	MAXPACKET_SIZE=USB_MAX_PACKET0;
	EP_INDEX=1;
	MAXPACKET_SIZE=USB_MAX_PACKET0;
	while((DEV_INT_STAT & EP_RLZED_INT)==0);
	EP_INT_CLR =0xFFFFFFFF;
	EP_INT_EN  =0xFFFFFFFF ^ USB_DMA_EP;
	DEV_INT_CLR=0xFFFFFFFF;
	DEV_INT_EN=DEV_STAT_INT | EP_SLOW_INT | (USB_SOF_EVENT ? FRAME_INT : 0) | (USB_ERROR_EVENT ? ERR_INT : 0);
}