本文主要是 基于AT89C52,ADC0809简易数字电压表数码管显示c程序(4位的共阳数码管),主要是最后89C52的四位控制 相关的知识问答,如果你也了解,请帮忙补充。
参考知识1#include <reg52.h>
unsigned char code dispbitcode[]=0xfe,0xfd,0xfb,0xf7,
0xef,0xdf,0xbf,0x7f;
unsigned char code dispcode[]=0x3f,0x06,0x5b,0x4f,0x66,
0x6d,0x7d,0x07,0x7f,0x6f,0x00;
unsigned char dispbuf[8]=10,10,10,10,0,0,0,0;
unsigned char dispcount;
unsigned char getdata;
unsigned int temp;
unsigned char i;
sbit ST=P3^0;
sbit OE=P3^1;
sbit EOC=P3^2;
sbit CLK=P3^3;
void main(void)
ST=0;
OE=0;
ET0=1;
ET1=1;
EA=1;
TMOD=0x12;
TH0=216;
TL0=216;
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
TR1=1;
TR0=1;
ST=1;
ST=0;
while(1)
if(EOC==1)
OE=1;
getdata=P0;
OE=0;
temp=getdata*235;
temp=temp/128;
i=5;
dispbuf[0]=10;
dispbuf[1]=10;
dispbuf[2]=10;
dispbuf[3]=10;
dispbuf[4]=10;
dispbuf[5]=0;
dispbuf[6]=0;
dispbuf[7]=0;
while(temp/10)
dispbuf[i]=temp%10;
temp=temp/10;
i++;
dispbuf[i]=temp;
ST=1;
ST=0;
void t0(void) interrupt 1 using 0
CLK=~CLK;
void t1(void) interrupt 3 using 0
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
P1=dispcode[dispbuf[dispcount]];
P2=dispbitcode[dispcount];
if(dispcount==7)
P1=P1 | 0x80;
dispcount++;
if(dispcount==8)
dispcount=0;
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