關(guān)于51單片機按鍵控制數(shù)碼管,為什么我按下p35沒有反應(yīng)，當數(shù)字應(yīng)變?yōu)?時會變成巳 ...

ID:843725 · 發(fā)表于 2021-3-21 10:46

#include <REGX52.H>
sbit k1=P3^4;
sbit k2=P3^5;
unsigned char table[]={0xc0,0xf9,0x4,0xb0,0x99,0x92,0x02,
                     0xf8,0x00,0x10};
void Delay(unsigned char x)
{
      while(x--)
      {
            unsigned char i,j;
i = 2;
      j = 239;
      do
      {
            while (--j);
      } while (--i);
}
}
void main ()
{
int n=0;
      P2_0=0;
      P2_1=1;
      P2_2=1;
      P2_3=1;
      P2_4=1;
      while(1)
      {
if(k1==0)
{
Delay(500);
      if(k1==0)
      {
++n;
            if(n==10)
                     n=0;
}
while(k1==1);
}
if(k2==0)
{
Delay(500);
      if(k2==0)
      {
--n;
            if(n<0)
                     n=9;
            while(k2==0);
}
}
P2_0=0;
      P2_1=0;
      P2_2=0;
      P2_3=0;
      P2_4=0;
P0=table[n];
}
}