按键控制LED-EDA365

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按键控制LED

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LED
按键控制

#include
#define unchar unsigned char
sbit k1=P3^0;
sbit k2=P3^1;
sbit k3=P3^2;
sbit k4=P3^3;
sbit k5=P3^4;
sbit k6=P3^5;
sbit k7=P3^6;
sbit k8=P3^7;    //按键号码
unchar spyon();
unchar led,a,b;
static unchar flag=0;
void zhma();
void  fanma();
void  zheshui();
void  fanshu();
void  quanm();
void quanliang();
void delay();
void main()
{
  while(1)
  {
   P3=0xff;
   if(flag==0)
   {
    P2=0;
    delay();
    P2=0xff;
    delay();
   }
   flag=spyon();
  switch(flag)
  {
  case 1:     //D2,D7灭
    {
zhma();
break;
}
   case 2:     //D3,D7亮
    {
fanma();
break;
}
   case 3:    //D3，D7灭
    {
zheshui();
break;
}
   case 4:     //一号灯闪亮
     {
  fanshu();
  break;
  }
    case 5:  //闪亮
   {
   quanm();
    break;
    }
    case 6:    //全亮
{
  quanliang();
  break;
  }
    case 7:   //亮后4个灯
  {
  led=0xf0;
P2=led;
  break;
  }
   case 8:     //亮前四个灯
  {
  led=0x0f;
P2=led;
  break;
  }
  default:
  {

   break;
   }
  }
}
}
unchar spyon()
{
    a=P3;
    a=a&0xf0;
if(a!=0xf0)
{
    a=~((a>>4)|0xf0);
    if(a==1)
       return 5;
    else if(a==2)
        return 6;
    else if(a==4)
        return 7;
    else if(a==8)
         return 8;
}
else
{
a=P3;
    a=a&0x0f;
if(a!=0x0f)
{
a=~(a|0xf0);
    if(a==1)
        return 1;
    else if(a==2)
        return 2;
    else if(a==4)
        return 3;
    else if(a==8)
        return 4;
}
}
  }
void zhma()
{
  unchar led;
  led=0x42;
  P2=led;
  delay();
}
void  fanma()
{
  unchar led;
  led=0xdd;
  P2=led;
  delay();
}
void  zheshui()
{
   unchar led;
   led=0x22;
   P2=led;
   delay();
   led=0xfe;

}
void  fanshu()
{
led=0xff;
P2=led;
    delay();
led=0x7f;
P2=led;
   delay();
}
void  quanm()
{
  led=0x7e;
  P2=led;
  delay();
  led=0xdd;
  P2=led;
  delay();
}
void quanliang()
{
P2=0;
}
void delay()
{
  for(a=0;a<200;a++)
  for(b=0;b<200;b++);
}

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