main.h

用于单片机的开发 用modbus协议 实现上位机与下位机的通讯

#include "reg52.h"

typedef unsigned char	uint8;
typedef unsigned int	uint16;
typedef unsigned long	uint32;


sbit	bRunLED			=	P3^4;	//运行指示灯
sbit	bWatchDog		=	P1^7;	//看门狗复位
sbit	b485Send		= 	P1^3;	//75LBC184 发送接收控制
	
#define TIMER_HIGHT	0xf8
#define TIMER_LOW	0xcd
 

extern uint8	idata sendBuf[16],receBuf[16];
extern uint8	idata checkoutError;	// ==2 偶校验错 
extern uint8	idata receTimeOut;
extern uint32 	dwTickCount;


#include "modbus.h"