ADC0804+LED数码管显示模拟值0~255

#include#define uint unsigned int #define uchar unsigned charsbit rd=P3^7;sbit wr=P3^6;sbit cs0=P3^5;sbit hc=P3^4;void delay(uint );void format0804();void display(uchar aa );unsigned char code  table1[]=   //共阳段码控制{0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; unsigned char code   dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdF,0xbF,0x7F}; //位选控制   查表的方法控制 uchar aa,adc0804;void main(){  //uint adc0804;cs0=0;P1=0xff;//为P1口读取数据做准备，与P1口相连的某个引脚若为低，则P1相应位被拉低，hc=1; //以此来读取数据while(1){ /*wr=1;delay(1);wr=0;rd=1;delay(1);wr=1;rd=0;adc0804=P1;//根据时序DAC0804时序图，只能在些读取其输出值delay(1);rd=1;delay(1); */format0804();adc0804=P1;   //在rd=0才能读取P1口状态，display(adc0804); }  }void delay(uint z){uint j;for(z;z>0;z--)for(j=110;j>0;j--);}void format0804(){wr=1;//delay(1);wr=0;wr=1;//根据时序ADC0804时序图，只有wr端存在上升沿就可读取模拟值rd=1;//delay(1);rd=0;   //根据时序ADC0804时序图，只有rd低电平时才能向外发送信号//adc0804=P1;//delay(1);//rd=1;}  void display(uchar aa){uchar ledout[10],i;ledout[0]=table1[aa%10000/1000];    //千位ledout[1]=table1[aa%1000/100];  //百位带小数点ledout[2]=table1[aa%100/10];     //十位ledout[3]=table1[aa%10];             //个位for(i=0;i<4;i++){P2=dispbit[i];//位选 先位选再段选P0=ledout[i]; //段码delay(1);}}