基于51单片机和ADC0809数模转换的C程序

#include#include #define uchar unsigned char #define uint unsigned int/*定义LCD1602接口信息*/sbit lcdrs=P30;/数据命令选择位sbit lcden=P31;/使能位sbit lcdrw=P32;/*定义ADC0808接口信息*/sbit ADA=P20; sbit ADB=P21; sbit ADC=P22; sbit EOC=P23; sbit CLK=P24; sbit START=P25; sbit OE=P26;/*键盘管脚定义*/sbit key1=P33; sbit key2=P37;/*定义数据*/uchar tab1=48,46,48,48,48,46,48,48,48,46,48,48,48,46,48,48; /存放AD采集数据uchar tab2=48,46,48,48,48,46,48,48,48,46,48,48,48,46,48,48; uchar tab3=TONGLU:; uchar tab4=DIANYA:; uchar tab5=;uchar num,m=0,getdata=0; uint temp=0;/*延时函数*/ void delay(uchar t) uchar x,y; for(x=t;x0;x-) for(y=110;y0;y-); void delayl(uchar ltime) uchar i; for(i=ltime;i0;i-) delay(255); /*写命令函数*/void write_com(uchar com) lcdrs=0; P0=com; delay(10); lcden=1; delay(10); lcden=0; /*写数据函数*/ void write_data(uchar date) lcdrs=1; P0=date; delay(10); lcden=1; delay(10); lcden=0; void disp(uchar h,l,uchar *p) write_com(0x80+h*0x40+l); while(*p!=0) write_data(*p); p+; /*初始化函数*/void LcdInit() lcdrw=0; delay(5); lcden=0;/使能位置低电平 write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01); write_com(0x80); delayl(20); void TimeInit() TMOD=0x10;/定时器1工作于方式1,16位不重装初值 TH1=(65536-200)/256; /定时200us(5KHz) TL1=(65536-200)%256; EA=1; ET1=1; TR1=1; void AdTr(bit ADDA,ADDB,ADDC,uchar channel) START=0; OE=0; START=1; START=0;/A/D转换启动信号，正脉冲启动选中的模拟信号开始转换 ADA=ADDA; ADB=ADDB; ADC=ADDC; delay(5); while(EOC=0);/启动转换后EOC变为L,转换结束后变为H OE=1; getdata=P1; temp=getdata*1.0/255*500;OE=0; if(channel=4) channel=channel-4; tab24*channel=temp/100+0x30; tab24*channel+2=(temp%100)/10+0x30; tab24*channel+3=(temp%100)%10+0x30; void keyscan()/* 按键2进行减1*/ uint k; if(key1=0) m-; if(m5) write_com(0x80+0x07); write_data(tab5m-1); write_com(0x80+0x47); for(k=0;k=5&m9) write_com(0x80+0x07); write_data(tab5m-1); write_com(0x80+0x47); for(k=0;k4;k+)write_data(tab24*(m-5)+k); if(m=1)m=1; while(key1=0); /等待按键释放 if(key2=0) m+; if(m5) write_com(0x80+0x07); write_data(tab5m-1); write_com(0x80+0x47); for(k=0;k=5&m9) write_com(0x80+0x07); write_data(tab5m-1); write_com(0x80+0x47); for(k=0;k4;k+) write_data(tab24*(m-5)+k); if(m=9)m=0; while(key2=0); /等待按键释放 void main() LcdInit(); TimeInit(); while(1) AdTr(0,0,0,0); delay(5); AdTr(0,0,1,1); delay(5); AdTr(0,1,0,2); delay(5); AdTr(0,1,1,3); delay(5); AdTr(1,0,0,4); delay(5); AdTr(1,0,1,5); delay(5); AdTr(1,1,0,6); delay(5); AdTr(1,1,1,7); delay(5); disp(