ADC0832程序

电位器输入接单片机的ADC0832数码管显示C程序，

#include

#include

#include

#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*/ };

{

int i,j;

for(i=0;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;

P2=value[j+b+1];

delay(5);

P0=0x00;

P2=0x00;

j+=2;

}

a++;

}

}