基于嵌入式与单片机的AD0832设计的电压表32X16点阵显示实现

#include <intrins.h> #include <reg52.h> #include <stdio.h> #define ulong unsigned long #define uint unsigned int #define uchar unsigned char uchar k,i,j; float l; sbit sw=P3^0; //159选通开关 sbit ADCS =P3^1; //ADC0832 chip seclect sbit ADDI =P3^3; //ADC0832 k in sbit ADDO =P3^3; //ADC0832 k out sbit ADCLK =P3^2; //ADC0832 clock signal uchar dsw[20]; //存放sprintf转换字符 uchar idata value[149]; //点阵字符储存 uchar 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*/ }; void delay(int c) //延时，C不能小于5 { int i,j; for(i=0;i<c;i++) for(j=0;j<10;j++) ; } /************ 读ADC0832函数 ************/ //采集并返回 unsigned int Adc0832(unsigned char 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++; } }