Altera FPGA 上利用nios嵌入式处理器实现USB的通信控制

				
				#ifndef __COMMON_H__
				#define __COMMON_H__
				
				#include "BasicTyp.h"
				#include "usb_irq.h"
				
				   //*************************************************************************
				   // macros
				   //*************************************************************************
				
				#define SWAP(x)   (x)
				#define MSB(x)    (((x) >> 8) & 0xFF)
				#define LSB(x)    ((x) & 0xFF)
				
				#define RaiseIRQL() disable()
				#define LowerIRQL() enable()
				#define NULL_LENGTH 0xff
				
				   //*************************************************************************
				   // structure and union definitions
				   //*************************************************************************
				
				
				#define  DEV_BEHAVIOUR_NOT_SPECIFIED  0 
				
				typedef union _USBCHECK_DEVICE_STATES
				{
					struct _USBCHECK_FLAGS
					{
						unsigned char	DEVICE_DEFAULT_STATE	   : 1;
						unsigned char	DEVICE_ADDRESS_STATE 	   : 1;
						unsigned char	DEVICE_CONFIGURATION_STATE : 1;
						unsigned char	DEVICE_INTERFACE_STATE	   : 1;
						unsigned char	FOUR_RESERVED_BITS		   : 8;
						unsigned char	RESET_BITS		           : 8;
					}State_bits;
					
					unsigned char MY_WAY;
				}USBCHECK_DEVICE_STATES;
				
				
				
				typedef union _D13FLAGS
				{
					struct _D13FSM_FLAGS
					{
				
				// Byte 0
						IRQL_1 UCHAR    bus_reset           : 1;
				    IRQL_1 UCHAR         suspend             : 1;
				    IRQL_1 UCHAR        At_IRQL1		        : 1;
						IRQL_0 UCHAR    configuration		    : 1;
						IRQL_0 UCHAR    remote_wakeup		    : 1;
						IRQL_0 UCHAR    Reserved00          : 3;
				// Byte 1
						IRQL_1 UCHAR    DCP_state			      : 4;
						IRQL_1 UCHAR    DCP_IOorMEM         : 1;
						IRQL_1 UCHAR    ISO_state	          : 3;
				// Byte 2
						IRQL_1 UCHAR	  setup_dma				        : 1;
						IRQL_1 UCHAR	  control_write_processed	: 1;
						IRQL_1 UCHAR	  dma_disable				      : 1;
						IRQL_1 UCHAR	  dma_state				        : 2;
						IRQL_1 UCHAR      toggle_bit_corrected	  : 1;
						IRQL_1 UCHAR	  control_out_done		    : 1;
						IRQL_0 UCHAR      Reserved20            	: 1;
				// Byte 3
						IRQL_1 UCHAR      verbose				      : 1;
						IRQL_1 UCHAR      timer               : 1;
						IRQL_1 UCHAR      dbg                 : 1;
						IRQL_1 UCHAR      Reserved30          : 5;
					} bits;
				
					ULONG value;
				
				} D13FLAGS;
				
				typedef struct _device_request
				{
					UCHAR bmRequestType;
					UCHAR bRequest;
				  
					unsigned short int  wValue;
				  unsigned short int  wIndex;
					unsigned short int  wLength;
				} DEVICE_REQUEST;
				
				// ******************************************************************************
				
				typedef struct _IO_REQUEST 
				{
					USHORT	uAddressL;
					UCHAR	bAddressH;
					USHORT	uSize;
					UCHAR	bCommand;
				} IO_REQUEST, *PIO_REQUEST;
				
				//*******************************************************************************
				
				#define MAX_CONTROLDATA_SIZE	16
				typedef struct _CONTROL_XFER
				{
					IRQL_1 BOOLEAN          Abort;      /*Indicate this transfer shall be aborted ASAP*/
					IRQL_1 DEVICE_REQUEST   DeviceRequest;
					IRQL_1 USHORT  		    wLength;
					IRQL_1 USHORT  		    wCount;
					IRQL_1 ADDRESS          Addr;
					IRQL_1 UCHAR            dataBuffer[MAX_CONTROLDATA_SIZE];
				
				} CONTROL_XFER, * PCONTROL_XFER;
				
				
				// FSM for Default Control Pipe
				#define USBFSM4DCP_IDLE             0x0
				#define USBFSM4DCP_DATAIN           0x1
				#define USBFSM4DCP_DATAOUT          0x2
				#define USBFSM4DCP_REQUESTPROC      0x3
				#define USBFSM4DCP_HANDSHAKE        0x4
				#define USBFSM4DCP_SETUPPROC        0x5
				#define USBFSM4DCP_REQUESTPROC1     0x6
				#define USBFSM4DCP_STALL            0x7
				#define USBFSM4DCP_REQUESTPROC2     0x8
				#define USBFSM4DCP_REQUESTPROC3     0x9
				#define USBFSM4DCP_CONTROLOUTDONE   0x0A
				
				#endif