ht6221

单片机解码电路与程序

[原创]Ht6221红外遥控C语言解码
//★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
//★HT6221标准红外C语言解码程序                                                    ★
//★CPU  AT89S51    晶振12MHz      接口 P.7                                     ★
//★ht6221 资料：                                                                               ★
//★Designed by pufan                                                                 ★
//★日期2006-06-14                                                                            ★
//★Email: [e-mail]                                                                ★
//★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
#include<reg51.h>

#define UINT8 unsigned char
#define UINT16  unsigned int
#define UINT32 unsigned long

UINT8 IRCommandData;
UINT8 da[4]={0,0,0,0};

UINT8 table[18]={0x28,0x7e,0xa2,0x62,0x74,0x61,0x21,0x7a,0x20,0x60,0x30,0x25,0xa7,0x26,0xa1,0xb1,0x34,0xab};

sbit IR=P3^7;

//============主程序====================================================
void delay(UINT16 cnt)
{
while(--cnt);
}

void d870us(void)
{
delay(108);//12M
}

void d1000us(void)
{
delay(125);//12M
}

void d4740us(void)
{
delay(593);//12M
}
//----------------------------------------------------

//-----------------------------------------------
//  ht6221解码程序
//-----------------------------------------------
UINT8 IRDecode(void)
{
     UINT8 i,m,n;
 
     for(i=0;i<10;i++)
     {
          d870us();
          if(IR) goto exit;
     }
     
     while(!IR);
     d4740us();

     //开始解码
     for(m=0;m<4;m++){
        for(n=0;n<8;n++){
            while(!IR);
          
            d870us();
            if(IR)
            {
                d1000us();
                da[m]=da[m]>>1;
                da[m]=da[m]|0x80;
            }
            else
            {
                da[m]=da[m]>>1;
                da[m]=da[m]|0;
            }
                //while(IR);
                //while(!IR);
        }
    }
    if((da[0]==0x0)&&(da[1]==0xFF))
    {            
        if(da[2]==(~da[3]))
           return da[2];
       }
exit:
    return 0; 
}

void SendData(UINT8 c)
{
    P0=c;
}

void main(void)
{
    P2=0xFD;//选通一位数码管
    P0=0xff;
    
    while(1)
    {
        if(!IR)
        {
            IRCommandData=IRDecode();
            switch(IRCommandData)
              { 
                   case 0x10:SendData(table[1]);break;
                case 0x03:SendData(table[2]);break;
                case 0x01:SendData(table[3]);break;
                case 0x06:SendData(table[4]);break;
                case 0x09:SendData(table[5]);break;
                case 0x1d:SendData(table[6]);break;
                case 0x1f:SendData(table[7]);break;
                case 0x0d:SendData(table[8]);break;
                case 0x19:SendData(table[9]);break;              
               default:break;
              }
         }
    }
}