commdrv.h

基于51的单片机的PPP协议实现

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

File Name : CommDrv.h

Author : Rene Trenado

Location : Motorola Applications Lab, Baja California

Date Created : July 2000

Current Revision : 0.0

Notes : This file contains comm port specific definitions

/////////////////////////////////////////////////////////////////////////////*/
#ifndef _H_COMMDRV_
#define _H_COMMDRV_

#include "Notation.h"

#define BAUDS_2400    3   // 8 Divisor
#define BAUDS_4800    2   // 4 Divisor
#define BAUDS_9600    1   // 2 Divisor
#define BAUDS_19200   0   // 1 Divisor

typedef enum  {
  ENABLE_RX = 0x04,		// enable receiver
  ENABLE_TX = 0x08,		// enable transmitter
  ENABLE_RX_EVENTS = 0x20,	// enable receiver interrupts
  ENABLE_TX_EVENTS = 0x80	// enable transmitter interrupts
} CommOptions;

#define SCC1  *((BYTE *)0x13)		// Status and contro registers
#define SCC2  *((BYTE *)0x14)
#define SCS1  *((volatile BYTE *)0x16)
#define SCDR  *((volatile BYTE *)0x18)
#define SCBR  *((BYTE *)0x19)

extern void @interrupt UartRxISR (void);	// export ISR 

//////////////// API Functions to Export ////////////////////
void OpenComm (register BYTE BaudRate, register CommOptions Options);
void CloseComm (void);
void CommEventProc (EventProc Proc);
void WriteComm (BYTE c);
void WriteCommStr (char* string);
BYTE ReadComm (void);
void UseDefaultCommProc (void);

#endif