async.h

source code for visa card

#ifndef _ASYNC_H_
#define _ASYNC_H_

int             AsyncInit( int Port);
void            AsyncStop( void);
void            AsyncClear( void);
void            AsyncOut( int c);
void            AsyncHand( int handshake);
void            AsyncSet( int Baud, int Control);
int             AsyncIn( void);
int             AsyncInStat( void);
int             AsyncOutStat( void);
unsigned        AsyncStat( void);

#define COM1            0
#define COM2            1
#define COM3            2
#define COM4            3

/* Defines for Com Port Paramaters, the second paramater to AsyncSet() */
#define BITS_8          0x03
#define BITS_7          0x02
#define STOP_1          0x00
#define STOP_2          0x04
#define EVEN_PARITY     0x18
#define ODD_PARITY      0x08
#define NO_PARITY       0x00

/* Defines for AsyncHand() */
#define DTR             0x01
#define RTS             0x02
#define USER            0x04
#define LOOPBACK        0x10

/* Defines for AsyncStat() */
#define D_CTS           0x0100
#define D_DSR           0x0200
#define D_RI            0x0400
#define D_DCD           0x0800
#define CTS             0x1000
#define DSR             0x2000
#define RI              0x4000
#define DCD             0x8000
#define PARITY          0x0004
#define THREMPTY        0x0020
#define BREAKDET        0x1000

#endif