rs232x4.h

一个PPP上网协议源码,可通过GPRS网络接入因特网.

#if !defined( _RS232X4_H )
#define _RS232X4_H

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

//  BaudIdx = 1:  115.2kbps
//  BaudIdx = 2:  57.6kbps
//  BaudIdx = 3:  38.4kbps
//  BaudIdx = 6:  19.2kbps
//  BaudIdx = 12: 9600bps
//  BaudIdx = ...
//  Parity = 0:  no   parity
//         = 1:  odd  parity
//         = 2:  even parity
int InitUART( int PortNum, int BaudIdx, int Parity=0 );
int InstallISR( int PortNum );
int UninstallISR( int PortNum );

// return =  0: ok
//        = -1: output buffer full
int  PutOutputData( int PortNum, char abyte );
void StartSend( int PortNum );

// return = -1: no data available
int  GetInputData( int PortNum );

#endif