mbus.h

单片机数据通讯典型应用(光盘内容）

#ifndef __LZP_MBUS_H_
#define __LZP_MBUS_H_
#define TRUE   1
#define FALSE   0
#include<reg52.h>
#define rxMax 15   	//串口接收缓冲区大小
#define txMax 15  	//串口发送缓冲区大小
unsigned char rxBuf[rxMax + 1];		//定义串口通信接收缓冲区
unsigned char txBuf[txMax + 1];		//定义串口通信发送缓冲区
unsigned char m_frame_buffer[15];//定义MBUS帧结构，长度15个字节	
unsigned char rxHead;	//串口接收缓冲区的头部
unsigned char rxTail;	//串口接收缓冲区的尾部
unsigned char txHead;	//串口发送缓冲区的头部
unsigned char txTail;	//串口发送缓冲区的尾部
unsigned char tempData;	//数据的临时变量
void InitSerialcom( void );//串口初始化
/****************从串口缓冲区中读取数据，返回读取数据的个数**************/
unsigned char SerialcomRead( unsigned char *buf, unsigned char len );

/************向串口发送缓冲区中写入数据，并发起串口发送数据**************/
unsigned char SerialcomWrite( unsigned char *buf, unsigned char len );

/************发送MBUS数据帧***/
unsigned char send_mbus_frame(unsigned char *addr,unsigned char type, unsigned char cntr,unsigned char temperature); 

/************接收MBUS数据帧***/
unsigned char receive_mbus_frame(unsigned char *addr,unsigned char *type, unsigned char *cntr,unsigned char *temperature); 
#endif