利用外部中斷加獨(dú)立按鍵驅(qū)動(dòng)數(shù)碼管

ID:377234 · 發(fā)表于 2018-9-8 19:28

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
sbit gA=P2^2;
sbit gB=P2^3;
sbit gC=P2^4;
sbit key_s15=P3^2;
char num;
void Init()
{
EA=1;
EX0=1;
IT0=1;
}
void delay(uint z)
{
uchar x,y;
for(x=z;x>0;x--)
   for(y=110;y>0;y--);
}
void display()
{
   uchar shi,ge;
   shi=num/10;
   ge=num%10;
   gA=1;gB=1;gC=1;
   P0=table[shi];
   delay(10);
   gA=0;gB=1;gC=1;
   P0=table[ge];
   delay(10);
}
void main()
{
while(1)
{
   Init();
   display();
   delay(10);
}
}
void exter0() interrupt 0
{
      delay(10);
      if(key_s15==0)
      {
         num++;
         if(num==16)
         {
               num=0;
         }
      }
}

ID:1 · 發(fā)表于 2018-9-8 21:27

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利用外部中斷加獨(dú)立按鍵驅(qū)動(dòng)數(shù)碼管

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