MPX4115压力自动检测系统设计含单片机程序与仿真原理图 -

#include <reg51.h>
#include <intrins.h>
//ADC0832 引脚
sbit ADCS=P2^0;
sbit ADDI=P3^7;
sbit ADDO=P3^7;
sbit ADCLK=P3^6;
unsigned char dispbitcode[8]={0xF7,0xFB,0xFD,0xFE,0xEF,0xDF,0xBF,0x7F}; //位扫描
unsigned char dispcode[11]={0xC0,0xF9,0xA4,0xbB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF};
//段选码共阳极
unsigned char dispbuf[4];
unsigned int temp;
unsigned char getdata;
void delay_1ms(void)
{
unsigned char x,y;
x=3;
while(x--)
{y=40;
while(y--);
}
}
void display(void)
{char k;
for(k=0;k<4;k++)
{
P1=~dispbitcode[k];
P0=~dispcode[dispbuf[k]];
if(k==1)
P0=P0+0x80;
delay_1ms();
}
}
unsigned int ADC0832(unsigned char channel) //AD转换，返回结果
{unsigned char i=0;
unsigned char j;
unsigned int dat=0;
unsigned char ndat=0;
if(channel==0) channel=2;
if(channel==1) channel=3;
ADDI=1;
_nop_();
_nop_();
ADCS=0;
_nop_();
_nop_();
ADCLK=1;
_nop_();
_nop_();
ADCLK=0;
_nop_();
_nop_();
ADCLK=1;
ADDI=channel&0x1;
_nop_();
_nop_();
ADCLK=0;
_nop_();
_nop_();
ADCLK=1;
ADDI=(channel>>1)&0x1;
_nop_();
_nop_();
ADCLK=0;
ADDI=1;
_nop_();
_nop_();
dat=0;
for(i=0;i<8;i++)
{
dat|=ADDO;
ADCLK=1;
_nop_();
_nop_();
ADCLK=0;
_nop_();
_nop_();
dat<<=1;
if(i==7) dat|=ADDO;
}
for(i=0;i<8;i++)
{j=0;
j=j|ADDO;
ADCLK=1;
_nop_();
_nop_();
ADCLK=0;
_nop_();
_nop_();
j=j<<7;
ndat=ndat|j;
if(i<7) ndat>>=1;
}
ADCS=1;
ADCLK=0;
ADDO=1;
dat<<=8;
dat|=ndat;
return(dat);
}
void main(void)
{
while(1)
{
unsigned int temp;
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