devio.h

基于东南大学开发的SEP3203的ARM7中的所有驱动

/*****************************************************************************

 *  2.00a Oct 31/97 GLL Add mPut and mGet routines to device interfaces.

 */

/*****************************************************************************

* devio.h  - Input/Output Device Interface Header File.

*

* Copyright (c) 1992 Global Election Systems Inc.

*

* The authors hereby grant permission to use, copy, modify, distribute,

* and license this software and its documentation for any purpose, provided

* that existing copyright notices are retained in all copies and that this

* notice and the following disclaimer are included verbatim in any 

* distributions. No written agreement, license, or royalty fee is required

* for any of the authorized uses.

*

* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR

* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*

******************************************************************************

* REVISION HISTORY

*

* 97-10-31 Guy Lancaster <[e-mail]>, Global Election Systems Inc.

*   Added mPut() and mGet() calls to handle network packet I/O.

*****************************************************************************/



#ifndef DEVIO_H

#define DEVIO_H





#include <sys\devmng.h>



#include "netbuf.h"





/*  Definition of public constants

 */



/*  Open access flags */

#define O_RDONLY   1       /* Open for reading only */

#define O_WRONLY   2       /* Open for writing only */

#define O_RDWR     3       /* Open for reading and writing */

#define O_NONBLOCK 4       /* Do not block on I/O */

#define O_EXLOCK   8       /* Lock others from access */

#define O_CREAT    16      /* Create file if it doesn't exist */

#define O_TRUNC    32      /* If file exists, truncate to zero length */





/* Device error codes for errno. */

#define EACCES  1           /* The requested permissions are denied. */

#define ENXIO   2           /* The named device does not exist. */

#define ELOCK   3           /* The named device is locked or in use and cannot be locked. */

#define EBADF   4           /* Invalid device descriptor. */

#define ENOTTY  5           /* Specified device does not take I/O parameters */

#define EUSER   6           /* Operation interrupted by user action (NO button pressed) */

#define ENOTSUP 7           /* Function not supported */



/*  I/O control requests */

#define GETFL   1           /* Return the current I/O control flags. */

#define SETFL   2           /* Set the I/O control flags. */

#define ADDFL   3           /* Bitwise set the I/O control flags. */

#define SUBFL   4           /* Bitwise clear the I/O control flags. */ 

#define SETBAUD 6           /* Set only the baud rate bits */

#define IOFLUSH 7           /* flush input and output queues */

#define GETFRAME 8          /* Get framing character. */

#define SETFRAME 9          /* Set framing character. */



/*  I/O port settings */

#define B38400  0x00        /* Serial port baud rates. */

#define B19200  0x01

#define B9600   0x02

#define B4800   0x03

#define B2400   0x04

#define B1200   0x05

#define B600    0x06

#define B300    0x07

#define BAUD    0X07



#define CS8 0x08            /* Use 8 bit data frames (7 otherwise). */

#define PAREVN  0x10        /* Use even parity (if enabled). */

#define PARENB  0x20        /* Enable parity. */



#define IOXOFF  0x40        /* Enable XOFF flow control output. */

#define IONLCR  0x80        /* Map NL to CR-NL on output. */

#define LOCAL   0x100       /* Flag to indicate local mode */







/*

 *	 Definition of public data types.

 */

typedef struct DevDef_s {

    short (*open)(u_short minorNum);

    short (*close)(u_short minorNum);

    short (*read)(u_short minorNum, void *buf, u_short n);

    short (*write)(u_short minorNum, const void *buf, u_short n);

    

    short (*nGet)(u_short minorNum, NBuf **nbm, u_short timeout);

    short (*nPut)(u_short minorNum, NBuf *nb);

    

    short (*ioctl)(u_short minorNum, short request, void *arg);

} DevDef;





/*

 *	Definition of public functions

 */

const char *nameForDevice(int fd);      	/* Get name for file device ID. */

int nOpen(int id); 						/* Open fid on name */

int nClose(int id);                          /* Close a file */

int nRead(int id, void *s, int n);                /* read n char from device */

int nWrite(int id, void *s, int n);          /* write n char to device */

int nPut(int fid, NBuf *nb);                  /* Put an nBuf packet to device. */

int nGet(int fid, NBuf **nb, int timeout);        /* Get an nBuf packet from device. */

int isatty(int id);                              /* Tests if a tty device */

int ioctl(int fd, int op, void *data);             /* Input output control */





/* 

 *	Definition of public variables

 */

extern short errno;                   /* File device error number */



#endif // DEVIO_H

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