红外遥控解码数码管显示实验 -

标题: 红外遥控解码数码管显示实验 [打印本页]

作者: 倪好的你好 时间: 2016-11-8 22:04
标题: 红外遥控解码数码管显示实验
   #include <reg51.h>
   #define c(x) (x*110592/120000)
   sbit Ir_Pin=P3^2;
   sbit beep=P3^6;
   unsigned char code Led_Tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
            0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf};                      //共阳极数码显示码0-F.
   unsigned char code Led_Sel[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
   unsigned char Led_Buf[7]; //显示缓冲区
   char Led_Index;                //位选
   unsigned char Ir_Buf[4]; //用于保存解码结果
   void delay_50ms(unsigned int t)
{
unsigned int j;
for(;t>0;t--)
  for(j=6245;j>0;j--)
{;}
}

   //==============================================================
   //数码管扫描
   timer0() interrupt 1 using 1
   {
   TL0=65536-1000;
   TH0=(65536-1000)/256; //定时器0设定约1000us中断一次，用于数码管扫描
   P0=0xff;
   P2=Led_Sel[Led_Index];                         //位选
   P0=Led_Tab[Led_Buf[Led_Index]];                   //段选
   if(++Led_Index>7) Led_Index=0;                   //八个扫描完了,到第一个数码管

   }
   //==============================================================
   unsigned int Ir_Get_Low()
   {
   TL1=0;
   TH1=0;
   TR1=1;
   while(!Ir_Pin && (TH1&0x80)==0);
   TR1=0;
   return TH1*256+TL1;
   }
   //=============================================================
   unsigned int Ir_Get_High()
   {
   TL1=0;
   TH1=0;
   TR1=1;
   while(Ir_Pin && (TH1&0x80)==0);
   TR1=0;
   return TH1*256+TL1;
   }
   //==============================================================
   main()
   {
   unsigned int temp;
   char i,j;
   Led_Index=0;
   TMOD=0x11;
   TL0=65536-1000;
   TH0=(65536-1000)/256; //定时器0设定约1000us中断一次，用于数码管扫描
   EA=1;
   ET0=1;
   TR0=1;

   //Led_Buf[0]=0;
   //Led_Buf[1]=0;
   //Led_Buf[2]=0;
   //Led_Buf[3]=0; //显示区设成0
   // Led_Buf[4]=0;
   //Led_Buf[5]=0;
   //Led_Buf[6]=0;
   //Led_Buf[7]=0; //显示区设成0
   do{
   restart:
   while(Ir_Pin);
   temp=Ir_Get_Low();
   if(temp<c(8500) || temp>c(9500)) continue;//引导脉冲低电平9000
   temp=Ir_Get_High();
   if(temp<c(4000) || temp>c(5000)) continue;//引导脉冲高电平4500
   for(i=0;i<4;i++) //4个字节
   for(j=0;j<8;j++) //每个字节8位
   {
   temp=Ir_Get_Low();
   if(temp<c(200) || temp>c(800)) goto restart;
   temp=Ir_Get_High();
   if(temp<c(200) || temp>c(2000)) goto restart;
   Ir_Buf[i]>>=1;
   if(temp>c(1120)) Ir_Buf[i]|=0x80;
   }
   Led_Buf[0]=(Ir_Buf[0]/16)&0xf;//显示结果
   Led_Buf[1]=Ir_Buf[0]&0xf;    //显示结果
   Led_Buf[2]=(Ir_Buf[1]/16)&0xf; //显示结果
   Led_Buf[3]=Ir_Buf[1]&0xf;    //显示结果
   Led_Buf[4]=(Ir_Buf[2]/16)&0xf; //显示结果
   Led_Buf[5]=Ir_Buf[2]&0xf;    //显示结果
   Led_Buf[6]=(Ir_Buf[3]/16)&0xf; //显示结果
   Led_Buf[7]=Ir_Buf[3]&0xf;    //显示结果
   beep=0;
   delay_50ms(2);
   beep=1;
   }
   while(1);

   }

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