本帖最后由 badoudingxin 于 2012-10-30 12:19 编辑

程序说明：用key1与key2组合控制加减计数，按过key1后，再按key2加一计数；
按下key2后，再按下key1减一计数；key3清零。问题是：仿真过程中出现计数乱跳现象，跪请大侠帮忙调试，谢谢啊！


#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar code smg_du[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar code smg_we[]={0x01,0x02,0x04};
uchar buffer[]={0,0,0};
uint k,n;
int M=10;
void csh();
void jia();
void jian();
void zhiling();
sbit key1 = P3^0;
sbit key2 = P3^1;
sbit key3 = P3^2;
void csh()
{
  TMOD= 0x01;
  TH0=(65536-5000)/256;
  TL0=(65536-5000)%256;
  EA=1;
  ET0=1;
  TR0=1;
}
void delay(uint  t)
{
uchar j;
while(t--);
for(j=0;j<119;j++);
}
void show()
{
   uchar i;
   buffer[0]=M%100%10;
   buffer[1]=M%100/10;
   buffer[2]=M/100;

  
   for(i=0;i<3;i++)
   {
     P1=smg_du[buffer];
  P2=smg_we;
  delay(3);
  P2=0x00;     
  }
}
void main ()
{
csh();
key1=key2=key3=1;
k=1;n=0;
while(1)
{
    //jia();
    if(k==1&n==0)
    {
    jia();}else{   
    jian(); }     
    zhiling();
}
}
void timer0 () interrupt 1
{
  TH0=(65536-5000)/256;
  TL0=(65536-5000)%256;
  show();
}
void jia()
{
    if(key1==0)
  {
    delay(10);
if(key1==0){k=1;while(!key1);}
   }
   if(key2==0&k==1)
  {
   delay(10);
   if(key2==0&k==1){k=0;M++;while(!key2);}
  }
}
void jian()
{   
if(key2==0)
  {
    delay(10);
if(key2==0){n=1;while(!key2);}
   }
   if(key1==0&n==1)
  {
   delay(10);
   if(key1==0&n==1){n=0;M--;while(!key1);}
  }
}
void zhiling()
{
  if(M<0){M=0;}
  if(key3==0)
  {
   delay(10);
if(key3==0){M=0;}
  }
}