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基于51单片机+ADC0832的数字电压表设计(点阵显示)

逗比小憨憨 149

前言:

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#include <intrins.h>#include <reg52.h>#include <stdio.h>#include "dis.h"#define ulong unsigned long#define uint unsigned int#define uchar unsigned charuchar k,i,j;float l;sbit sw=P3^0;      //159选通开关sbit ADCS =P3^1;  //ADC0832 chip seclectsbit ADDI =P3^3;  //ADC0832 k insbit ADDO =P3^3;  //ADC0832 k outsbit ADCLK =P3^2;  //ADC0832 clock signaluchar dsw[20];  //存放sprintf转换字符uchar idata value[149]; //点阵字符储存void delay(int c)     //延时{    int i,j;    for(i=0;i<c;i++)        for(j=0;j<10;j++)            ;}//采集并返回unsigned int Adc0832(uchar channel)     //AD转换,返回结果{    uchar i=0;    uchar j;    uint dat=0;    uchar ndat=0;    if(channel==0)channel=2;    if(channel==1)channel=3;    ADDI=1;    _nop_();    _nop_();    ADCS=0;//拉低CS端    _nop_();    _nop_();    ADCLK=1;//拉高CLK端    _nop_();    _nop_();    ADCLK=0;//拉低CLK端,形成下降沿1    _nop_();    _nop_();    ADCLK=1;//拉高CLK端    ADDI=channel&0x1;    _nop_();    _nop_();    ADCLK=0;//拉低CLK端,形成下降沿2    _nop_();    _nop_();    ADCLK=1;//拉高CLK端    ADDI=(channel>>1)&0x1;    _nop_();    _nop_();    ADCLK=0;//拉低CLK端,形成下降沿3    ADDI=1;//控制命令结束     _nop_();    _nop_();    dat=0;    for(i=0;i<8;i++)    {        dat|=ADDO;//收数据        ADCLK=1;        _nop_();        _nop_();        ADCLK=0;//形成一次时钟脉冲        _nop_();        _nop_();        dat<<=1;        if(i==7)dat|=ADDO;    }      for(i=0;i<8;i++)    {        j=0;        j=j|ADDO;//收数据        ADCLK=1;        _nop_();        _nop_();        ADCLK=0;//形成一次时钟脉冲        _nop_();        _nop_();        j=j<<7;        ndat=ndat|j;        if(i<7)ndat>>=1;    }    ADCS=1;//拉低CS端    ADCLK=0;//拉低CLK端    ADDO=1;//拉高数据端,回到初始状态    dat<<=8;    dat|=ndat;    return(dat);            //return ad k}/*************************************************            点阵字符采集函数**************************************************/void tra(uchar *p)    //数组dsp[]里面的字符查询后,再储储存到另一个显示数组value[]{ for(i=0;i<5;i++)  {      if(i<4)        //i=2时查的是句号,其他3个是电压值      {        for(j=0;j<16;j++)        {           value[(i+1)*16+j]=table[(*p-0x2e)*16+j];        }       }      else      {  for(j=0;j<16;j++)      //电压符号V          value[(i+1)*16+j]=table[12*16+j];      }            p++;  }  for(i=0;i<16;i++)           //前16个和后21个消隐作用,不显示  value[i]=0;  for(i=128;i<149;i++)  value[i]=0;}void main()    {    unsigned int b=0,i,j;    unsigned char a;    while(1)    {    k=Adc0832(0);   //AD转换结果    l=k/255.0*5.0;    sprintf(dsw,"%2.3f",l);  //电压值转换成字符方式储存,不明白的人上百度查一下sprintf函数的运用就清楚的,俺也是查的    tra(dsw);    j=0;    if(a>2) //移动间隔时间;越大移动越慢        {        a=0;        b+=2;        if(b>=85)  //显示到最后一个字,回头显示            {            b=0;            }           }     sw=1;   //显示字符,顺序是从左扫到右,有16列,数据电平是从左1到左16,由低到高     for(i=0;i<16;i++)  //sw是154选通开关。        {        P1=i;        P0=value[j+b];        P2=value[j+b+1];        delay(5);        P0=0x00;        P2=0x00;        j+=2;        }     sw=0;     for(i=0;i<16;i++)        {        P1=i;        P0=value[j+b];        P2=value[j+b+1];        delay(5);        P0=0x00;        P2=0x00;        j+=2;        }        a++;         }}#ifndef _dis_H#define _dis_Hunsigned char code table[]={    //字符查表0x00,0x00,0x00,0x30,0x00,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*".",0*/0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x0F,0x10,0x10,0x08,0x20,0x08,0x20,0x10,0x10,0xE0,0x0F,0x00,0x00,/*"0",1*/0x00,0x00,0x10,0x20,0x10,0x20,0xF8,0x3F,0x00,0x20,0x00,0x20,0x00,0x00,0x00,0x00,/*"1",2*/0x00,0x00,0x70,0x30,0x08,0x28,0x08,0x24,0x08,0x22,0x88,0x21,0x70,0x30,0x00,0x00,/*"2",3*/0x00,0x00,0x30,0x18,0x08,0x20,0x88,0x20,0x88,0x20,0x48,0x11,0x30,0x0E,0x00,0x00,/*"3",4*/0x00,0x00,0x00,0x07,0xC0,0x04,0x20,0x24,0x10,0x24,0xF8,0x3F,0x00,0x24,0x00,0x00,/*"4",5*/0x00,0x00,0xF8,0x19,0x08,0x21,0x88,0x20,0x88,0x20,0x08,0x11,0x08,0x0E,0x00,0x00,/*"5",6*/0x00,0x00,0xE0,0x0F,0x10,0x11,0x88,0x20,0x88,0x20,0x18,0x11,0x00,0x0E,0x00,0x00,/*"6",7*/0x00,0x00,0x38,0x00,0x08,0x00,0x08,0x3F,0xC8,0x00,0x38,0x00,0x08,0x00,0x00,0x00,/*"7",8*/0x00,0x00,0x70,0x1C,0x88,0x22,0x08,0x21,0x08,0x21,0x88,0x22,0x70,0x1C,0x00,0x00,/*"8",9*/0x00,0x00,0xE0,0x00,0x10,0x31,0x08,0x22,0x08,0x22,0x10,0x11,0xE0,0x0F,0x00,0x00,/*"9",10*/0x08,0x00,0x78,0x00,0x88,0x07,0x00,0x38,0x00,0x0E,0xC8,0x01,0x38,0x00,0x08,0x00,/*"V",11*/};#endif

视频讲解:第204期

标签: #js float