communication.c

系统按键显示都具有,不同的I/O口,具有很大的参考价值

#include <Communication.h>

float ZeroData;	//零点数据
float CheckData[5];

void Rs232Init()
{
	 TMOD=0x21;               //定时器0工作方式1,定时器1工作方式2（自动重装载）
	 TL1=0xFA;
	 TH1=0xFA;                //设定波特率9600bps，晶振为11059200hz
	
	 PCON=0X80;
	 SCON=0x50;
	 TR1=1;
}
//发送上位机控制字
void SendMessureWord()
{
//	unsigned char temp;
	unsigned char i;
	unsigned CheckWord;
	//量程信息： _4000.0kpa 06 08，量程4000kPa,当前模块能转换的单位个数为6，校验点为8个     
	unsigned char MessureWord[13]={0X20,0X31,0X36,0X30,0X30,0X2E,0X30,0X6B,0X50,0X61,0X06,0X08};
	//校验和变量赋初值
	CheckWord = 0;
	while(!RI){;}RI=0;
	if(SBUF==0x55)
    {
		for(i=0;i<12;i++)
		{
			SBUF=MessureWord[i];while(!TI);TI=0;
			CheckWord+=MessureWord[i];
		}
		SBUF=CheckWord;while(!TI);TI=0;
	}
}
//接收上位机校验命令
void ReceiveCheckWord()
{
	unsigned char temp;
	unsigned char i;
	unsigned CheckWord[5];
	CheckWord[0]=temp;
	for(i=1;i<=4;i++)
	{
		while(!RI);RI=0;
		CheckWord[i] = SBUF;
	}
	if(CheckWord[1]!=0xAA)
		return;
	if((CheckWord[3]>=0x05)&&(CheckWord[2]<=0x10))//上位机要求进行当前校验点校验
	{
	}
	if(CheckWord[4]&0xf0==0x00)		//上位机要求压力清零，将当前压力值作为压力零点
		ZeroData = 0;
	if(CheckWord[4]&0x0f<0x06)		//上位机要求进行压力转换。
	{
	}
}
//发送上位机测量数据
void SendMessureData()
{
	unsigned char temp;
	union 
	{
		long Data_long ;
		unsigned char Data_char[4];
	}MessureDatatemp;
	while(!RI){;}RI=0;
	temp = SBUF ;
//	MessureDatatemp.Data_long = MessureData;
	if(temp==0x13)
	{
		
	}
}
void Rs232interrupt() interrupt 4 using 2  //串口接收中断
{
	unsigned char ReceiveData;
    if(RI==1)
    {
		EA = 0;
		ES = 0;
    	RI=0;
		ReceiveData = SBUF;
		if(ReceiveData==0x11)
		{
			SendMessureWord();
		}
		if(ReceiveData==0x22)
		{
			ReceiveCheckWord();
		}
		if(ReceiveData==0x12)
		{
		}
		ES = 1;
		EA = 1;
    }
}