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A//D转换

2024-07-12 07:51:02   211人阅读

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char 
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit adwr=P3^6;
sbit adrd=P3^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,0x66,
  0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71
};
void delayms(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=100;j>0;j--);
}
void display(uchar bai,uchar shi,uchar ge)
{
dula = 1;
P0=table[bai];
dula = 0;
P0=0xff;
wela=1;
P0=0x7e;
wela=0;
delayms(5);

dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0x7d;
wela=0;
delayms(5);

dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0x7b;
wela=0;
delayms(5);
}


void main()
{
uchar a,A1,A2,A3,adval;
wela=1;
P0=0x7f;
wela=0;
while(1)
{
adwr=1; //启动A/D转换使能
_nop_();
adwr=0;
_nop_();
adwr=1;
for(a=10;a>0;a--)
{
display(A1,A2,A3);
}
P1=0xff;
adrd=1;
_nop_();
adrd=0;
_nop_();
adval=P1;
adrd=1;
A1=adval/100;
A2=adval%100/10;
A3=adval%10;
}
}


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