STC12C5A60S2.AD转换用数码管显示

#include"stc12c5a.h"

#include"stdio.h"

#include"intrins.h"

//------------------------------------------------------------------------------

voidAD_init();

voidserial_init();

void delay(unsigned int a);

floatAD_work(unsigned char channel);

unsignedintAD_get(unsigned char channel);

voidchu(long);

unsigned char code table[]={0x06,0x7e,0x25,0x64,0x5c,0xc4,0x84,0x76,0x04,0x44};//带点的0-9,由于我的数码管连法不一样所以代码不一样

unsigned char code table1[]={0x02,0x7a,0x21,0x60,0x58,0xc0,0x80,0x72,0x00,0x40};//不带点unsigned char shi,ge,fen1;

long R;

sbitfeng=P0^1;

sbitji=P0^7;

sbitdian=P0^6;

//------------------------------------------------------------------------------

void display()

{

shi=R/1000;

ge=R%1000/100;

fen1=R%100/10;

P2=0X08;

P3=table[ge];

delay(5);

P2=0X04;

P3=table[fen1];

delay(5);

P2=0X02;

P3=table1[shi];

delay(5);

}

void main()

{

char k;

int b=0;

P0=0X00;

AD_init(); //A/D转换初始化

serial_init(); //串口初始化

while(1)

{ unsigned char i;

i=0;//P10口，i=n 则是P1n口

TI=1;

chu(AD_work(i));

if(b!=0)

R=b;

for(k=100;k>0;k--) //使用printf函数前须先将发送标志位TI置1

display();

TI=0;

if((R>=8000)&(R<=8500))

{

b=R;

P0=0XF2;

delay(200);

P0=0xf0;

delay(200);

}

if((R>=6000)&(R<=6500))

{

b=R;

P0=0XF2;

delay(200);

P0=0xf0;

delay(200);

}

}

}

//------------------------------------------------------------------------------

unsignedintAD_get(unsigned char channel)

{

ADC_CONTR=0x88|channel; //开启AD转换1000 1000 即POWER SPEED1 SPEED0 ADC_FLAG ADC_START CHS2 CHS1 CHS0

_nop_(); _nop_(); _nop_(); _nop_();//要经过4个CPU时钟的延时，其值才能够保证被设置进ADC_CONTR 寄存器

while(!(ADC_CONTR&0x10)); //等待转换完成

ADC_CONTR&=0xe7; //关闭AD转换，ADC_FLAG位由软件清0

return(ADC_RES*4+ADC_RESL); //返回AD转换完成的10位数据(16进制)

}

//------------------------------------------------------------------------------

floatAD_work(unsigned char channel)

{

double AD_val,AD_vale; //定义处理后的数值AD_val为浮点数

unsigned char i;

for(i=0;i<100;i++)

AD_val+=AD_get(channel); //转换100次求平均值(提高精度)

AD_val/=100;

AD_vale=(AD_val*5000)/1024; //AD的参考电压是单片机上的5v，所以乘5000，实际电压值为N，就乘NX1000;

returnAD_vale;

}

voidchu(long a)

{

R=a;

}

//------------------------------------------------------------------------------

void delay(unsigned int a) //延时约1ms

{

unsignedinti;

while (--a!=0)

for(i=600;i>0;i--); //1T单片机i=600，若是12T单片机i=125

}

//------------------------------------------------------------------------------

voidserial_init()

{

TMOD=0x20;

TH1=0xfd;

TL1=0xfd; //设置9600波特率

SCON=0x50; //串口方式1，允许接收

TR1=1;

}

//------------------------------------------------------------------------------

voidAD_init()

{

P1ASF=0xff; //P1口全部作为模拟功能AD使用

ADC_RES=0; //清零转换结果寄存器高8位

ADC_RESL=0; //清零转换结果寄存器低2位

ADC_CONTR=0x80;//开启AD电源

delay(2); //等待1ms，让AD电源稳定

}