#if !defined( _RS232_H )
#define _RS232_H

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

// BaudIdx = 1:  115.2kbps
// BaudIdx = 2:  57.6kbps
// BaudIdx = 3:  38.4kbps
// BaudIdx = 6:  19.2kbps
// BaudIdx = 12: 9600bps
// BaudIdx = ...
int InitUART( int PortNum, unsigned int BaudIdx );
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