#include<STC15F2K60S2.H>
unsigned char mode=0;//模式变量
unsigned char stat=0;//闪烁位变量
unsigned int count_smg=0;//数码管闪烁计数变量
unsigned char f_open=0;//闪烁标志
sbit S7=P3^0;
unsigned char code table[]={0xc0,0xf9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
0x80,0x90,0x88,0x83,0xA7,0xA1,0x86,0x8E,0xbf,0x7f};
void select(unsigned char n) //打通译码器
{
  switch(n)
  {
    case 4:
      P2=(P2&0x1f)|0x80; 
      break;
    case 5:
      P2=(P2&0x1f)|0xa0;
      break;
    case 6:
      P2=(P2&0x1f)|0xc0;
      break;
    case 7:
      P2=(P2&0x1f)|0xe0;
      break;
  }
}
void guanbi() //关闭无关设备
{
  select(5);
  P0=0x00;
  select(4);
  P0=0xff;
}
//**************数码管段选位选函数
void shuma(unsigned char pos,unsigned char date) 
{
  select(7);
  P0=0xff;
  select(6);
  P0=0x01<<pos;
  select(7);
  P0=date;
}
//*************延时函数
void delayms(unsigned int x)
{
  while(x--);
}
//************数码管显示函数
void display()
{
  if(f_open==0)
  {
    shuma(0,table[1]);
    delayms(100);
    shuma(1,table[2]);
    delayms(100);
  }
  else 
  {
    shuma(0,0xff);
    shuma(1,0xff);
  }
    shuma(2,table[16]);
    delayms(100);
    shuma(3,table[3]);
    delayms(100);
    shuma(4,table[4]);
    delayms(100);
    shuma(5,table[16]);
    delayms(100);
    shuma(6,table[5]);
    delayms(100);
    shuma(7,table[6]);
    delayms(100); 
}
void display1()
{
    shuma(2,table[16]);
    delayms(100);
    shuma(0,table[1]);
    delayms(100);
    shuma(1,table[2]);
    delayms(100);
    shuma(5,table[16]);
    delayms(100);
    shuma(6,table[5]);
    delayms(100);
    shuma(7,table[6]);
    delayms(100); 
  if(f_open==0)
  {
    shuma(3,table[3]);
    delayms(100);
    shuma(4,table[4]);
    delayms(100);
  }
  else 
  {
    shuma(3,0xff);
    shuma(4,0xff);
  }
}
void display2()
{
    shuma(2,table[16]);
    delayms(100);
    shuma(0,table[1]);
    delayms(100);
    shuma(1,table[2]);
    delayms(100);
    shuma(5,table[16]);
    delayms(100);
    shuma(3,table[3]);
    delayms(100);
    shuma(4,table[4]);
    delayms(100); 
  if(f_open==0)
  {
    shuma(6,table[5]);
    delayms(100);
    shuma(7,table[6]);
    delayms(100);
  }
  else 
  {
    shuma(6,0xff);
    shuma(7,0xff);
  }
}
void INT()
{
  TMOD=0x01;
  TH0=(65535-1000)/256;
  TL0=(65535-1000)%256;
  EA=1;
  ET0=1;
  TR0=1;
}
void sreviceINT() interrupt 1
{
   TH0=(65535-1000)/256;
   TL0=(65535-1000)%256;
   count_smg++;
   if(count_smg==1000)
   {
     count_smg=0;
     f_open=~f_open;
   }
}
void scan()
{
  if(S7==0)
  {
    delayms(10);
    if(S7==0)
    {
      stat++;
      if(stat==4)
      {
        stat=1;
      }
      while(S7==0) //等待按键松开
      {
        if(stat==1)
        {
          display();
        }
        else if(stat==2)
        {
          display1();
        }
        else
        {
          display2();
        }
      }
    }
  }
}
void main()
{
  guanbi();
  INT();
  while(1)
  {
    scan();
    switch(stat)
    {
      case 1:
        display();
      break;
      case 2:
        display1();
      break;
      case 3:
        display2();
      break;
    }
  }
}