#include<reg52.h>

#include

#define uchar unsigned char

#define uint unsigned int

//****端口定义*************************

sbit lcdrst=P3^3;

sbit lcdrs=P3^2;

sbit lcdrw=P3^1;

sbit lcde=P3^0;

//****端口定义*************************

sbit ST=P2^7; //A/D启动转换信号

sbit OE=P2^5; //数据输出允许信号

sbit EOC=P2^6; //A/D转换结束信号

sbit CLK=P2^4; //时钟脉冲

sbit ADDA=P2^0;

sbit ADDB=P2^1;

sbit ADDC=P2^2;

//****显示缓存定义*********************

uint tabSambuffer[8]={0,0,0,0,0,0,0,0};

long tempvalue=0;//采集回来数据第一次处理

uint value_V=0;

uchar diapbuffer[4]={0,10,0,0};

uchar code tab_zix[]={"0123456789.:"};

uchar code dis1[]={" CH0: CH1: "};

uchar code dis2[]={" CH2: CH3: "};

uchar code dis3[]={" CH4: CH5: "};

uchar code dis4[]={" CH6: CH7: "};

uchar code dia11[]={">C"};//当前数据跟新

uchar code dia00[]={" C"};

uchar xh,cnt;

void longdelay(uchar t)

{

uint j;

for(;t>0;t--)

{for(j=1000;j>0;j--);}

}

void shortdelay(uchar i)

{

for(;i>0;i--);

}

//****读状态函数*************************

uchar readstatus(void)

{

uchar i;

P1=0xff;

lcdrw=1;

lcdrs=0;

lcde=0;

shortdelay(10);

lcde=1;

shortdelay(20);

i=P1;

shortdelay(40);

lcde=0;

return(i);

}

//****写命令函数*************************

void lcdwriteinstruc(uchar instruction)

{

while((readstatus()&0x80)!=0x00);

P1=0;

lcdrw=0;

lcdrs=0;

lcde=0;

P1=instruction;

shortdelay(100);

lcde=1;

shortdelay(100);

lcde=0;

}

//****初始化LCD*************************

void initlcd(void)

{

longdelay(40);

lcdrst=0;

longdelay(1);

lcdrst=1;

longdelay(1); //复位LCD

lcdwriteinstruc(0x30);

longdelay(1);

lcdwriteinstruc(0x30);

longdelay(1);

lcdwriteinstruc(0x0c); //显示开 游标关 游标位置反白

longdelay(1);

lcdwriteinstruc(0x01);

longdelay(1);

lcdwriteinstruc(0x06); //增量方式 不移位

longdelay(1);

}

//****写一个字节函数*************************

void writeonebyte(uchar dat)

{

while((readstatus()&0x80)!=0x00);

P1=0;

lcdrw=0;

lcdrs=1;

lcde=0;

P1=dat;

shortdelay(100);

lcde=1;

shortdelay(100);

lcde=0;

}

//****显示地址解析*************************

void disponeword(uchar x,uchar y)

{

uchar dispaddr;

switch(x)

{

case 0:dispaddr=0x80;break;

case 1:dispaddr=0x90;break;

case 2:dispaddr=0x88;break;

case 3:dispaddr=0x98;break;

default:break;

}

dispaddr=dispaddr+y;

lcdwriteinstruc(dispaddr);

}

void Clear()

{

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

disponeword(0,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia00[xh]);

shortdelay(1);

}

disponeword(1,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia00[xh]);

shortdelay(1);

}

disponeword(2,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia00[xh]);

shortdelay(1);

}

disponeword(3,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia00[xh]);

shortdelay(1);

}

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

}

void main()

{

initlcd();

//***********初始页面显示画面*************************************

disponeword(0,0);

for(xh=0;xh<17;xh++)

{

writeonebyte(dis1[xh]);

shortdelay(1);

}

disponeword(1,0);

for(xh=0;xh<17;xh++)

{

writeonebyte(dis2[xh]);

shortdelay(1);

}

disponeword(2,0);

for(xh=0;xh<17;xh++)

{

writeonebyte(dis3[xh]);

shortdelay(1);

}

disponeword(3,0);

for(xh=0;xh<17;xh++)

{

writeonebyte(dis4[xh]);

shortdelay(1);

}//***********初始页面显示画面***完*****************************

TMOD=0X01; //定时器中断0

CLK=0; //脉冲信号初始值为0

TH0=(65536-2)/256; //定时时间高八位初值

TL0=(65536-2)%6; //定时时间低八位初值

EA=1; //开CPU中断

ET0=1; //开T/C0中断

TR0=1;

while(1)

{

Clear();//清除当前行指示

for(cnt=0;cnt<8;cnt++)

{

P2&=0xf0;

P2|=cnt; //设置采集通道

ST=0;//使采集信号为低

shortdelay(2);

ST=1;//开始数据转换

shortdelay(2);

ST=0;//停止数据转换

longdelay(10); //长延时

//while(!EOC);//等待数据转换完毕

OE=1;//允许数据输出信号

shortdelay(1);

tabSambuffer[cnt]=P0;//读取数据

shortdelay(1);

OE=0;//一次数据采集完成

tempvalue=tabSambuffer[cnt];

tempvalue=tempvalue*341/256;

value_V=(uint)tempvalue;

diapbuffer[0]=11;

diapbuffer[1]=value_V/100;

diapbuffer[2]=10; //小数点 code tab_zix[]

diapbuffer[3]=value_V0/10;

switch(cnt)

{

case 0x00:disponeword(0,2); break;

case 0x01:disponeword(0,6); break;

case 0x02:disponeword(1,2); break;

case 0x03:disponeword(1,6); break;

case 0x04:disponeword(2,2); break;

case 0x05:disponeword(2,6); break;

case 0x06:disponeword(3,2); break;

case 0x07:disponeword(3,6); break;

}

for(xh=0;xh<4;xh++) //每次更新数据

{

writeonebyte(tab_zix[diapbuffer[xh]]);

shortdelay(1);

}

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

if((cnt==0)|(cnt==1))//更新数据后指示当前行

{

disponeword(0,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia11[xh]);

shortdelay(1);

}

}

if((cnt==2)|(cnt==3))//更新数据后指示当前行

{

disponeword(1,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia11[xh]);

shortdelay(1);

}

}

if((cnt==4)|(cnt==5))//更新数据后指示当前行

{

disponeword(2,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia11[xh]);

shortdelay(1);

}

}

if((cnt==6)|(cnt==7))//更新数据后指示当前行

{

disponeword(3,0);

for(xh=0;xh<2;xh++)

{

writeonebyte(dia11[xh]);

shortdelay(1);

}

}

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

}

}

}

//***********产生AD采样脉冲*******************************************

void timer0( ) interrupt 1 //定时器0工作方式1

{

TH0=(65536-2)/256; //重装计数初值

TL0=(65536-2)%6; //重装计数初值

CLK=!CLK; //取?

}