parser.h

usbn9603等时传输的firmware

/*----------------------------------------------------------------------------
 *  Copyright (c) 2001 by National Semiconductor Corporation
 *  National Semiconductor Corporation
 *
 *  All rights reserved
 *
 *<<<-------------------------------------------------------------------------
 * File Contents:
 *	parser.h - parser states
 *
 *  Project: USB Demo firmware
 *  Author : Yan Nosovitsky
 *  Date   : Oct 2001
 *----------------------------------------------------------------------->>>*/

#ifndef _parser_h_
#define _parser_h_

/*-------------------------------------------------------------------
* This structure represents buffer used in immediate response command
*-------------------------------------------------------------------*/
typedef struct {
	byte 		buffer[TX_BULK_EP_FIFO_SIZE];  /* the buffer */
	boolean 	getReady;					   /* boolean indicating buffer emptiness */
	boolean 	sendReady;					   /* boolean indicating buffer fullness */
	int 		nextBuf;					   /* index of the next buffer */	
} BulkBuff;

/*-------------------------------------------------------------------
* This structure represents last bulk command status
*-------------------------------------------------------------------*/
typedef struct {
	BulkCommand bulkCommand; 			/* current bulk command */
	dword 		dataSize;			 	/* number of bytes to be sent/received in current command */
	dword 		restToRead;				/* remained number of bytes to be received */
	dword 		restToWrite;			/* remained number of bytes to be sent*/
	byte 		data;					/* constant byte of which the data is contained, for BULK_GET_DATA and BULK_SEND_DATA commands */
	dword 		numOfErrors;			/* number of errors detected during the command */
	boolean 	zeroPacketNeed;  		/* boolean indicating whether a zero packet needed for end indication*/
	int 		bufferForGetData;		/* index of the "receiving"  buffer (for BULK_SEND_IMM_BACK command only) */
	int 		bufferForSendData;		/* index of the "sending"  buffer (for BULK_SEND_IMM_BACK command only) */
	BulkBuff 	bulkBuff[2];			/* recived/sent data buffers (for BULK_SEND_IMM_BACK only) */
	} BulkState;

/*-------------------------------------------------------------------
* This structure represents last interrupt command status
*-------------------------------------------------------------------*/
typedef struct {
	InterruptCommand 	interruptCommand;	/* current interrupt command */
	word 				interruptNum;		/* number of interrupts to be sent in current command */
	word				restToSend;			/* remained number of interrupts to be sent*/
	word				interval;			/* interval between the interrupts */
} InterruptState;

byte Bulk_Parser		(USB_request_t *req);
byte Gen_Parser			(USB_request_t *req);
byte Interrupt_Parser	(USB_request_t *req);

#endif