Decoding program for infrared coding chips such as AVR microcontroller uPD6121/AS6122

#include 

#define uchar unsigned char    
#define ulong unsigned long  
/*------------------------------Display-----------------------------------*/  
#define  LED _DATA PORTB  
const uchar tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};  
/*  
                     0 1 2 3 4 5 6 7 8 9 A B C D E F      
*/  
void delay(void){  
    uint i;  
    for(i=0;i<2000;i++);  
}  
void dis_int(uint dis_data)  
{ //Four-digit common cathode digital tube , hexadecimal display  
     LED_DATA=tab[(uchar)((dis_data&0xf000)>>12)]; //Display thousands digit  
     PORTD=0xf7;                  
     delay(); //Delay  
    
     LED_DATA=tab[(uchar)((dis_data&0x0f00)>>8)]; //Display hundreds digit  
     PORTD=0xfb;   
     delay(); //Delay  
                            
     LED_DATA=tab[(uchar)(dis_data&0x00f0)>>4]; //Display tens digit  
     PORTD=0xfd;  
     delay(); //Delay  
       
     LED_DATA=tab[(uchar)dis_data&0x000f]; //Display ones digit  
     PORTD=0xfe;  
     delay(); //Delay   
}  
void port_init(void)  
{  
 PORTA = 0xFF;  
 DDRA = 0x00;  
 PORTB = 0xFF;  
 DDRB = 0xFF;  
 PORTC = 0xFF;   
 DDRC = 0xFF;  
 PORTD = 0xFF;  
 DDRD = 0x0F;  
}  
void timer1_init(void)  
{  
 T CC R1B = 0x00; //stop  
 TCNT1H = 0x00; //setup  
 TCNT1L = 0x00;  
 IC R1H = 0x00;  
 ICR1L = 0x08;  
 TCCR1A = 0x00;  
/*Connect the DATA pin of the integrated receiver to the PD6 (ICP1) pin of ATmega16, and decode by rising edge capture*/  
/* The crystal oscillator is 6M, without frequency division , and 8M is too large (the frequency division is too small)*/  
 TCCR1B = 0x41; //start Timer  
}  
uint arr[16];//Save the capture value  
uchar times;//Record the number of captures  
uchar index;//Array index  
uchar ir_code;//Infrared remote control key code  
uchar OK_flag;//Decoding completed flag  
/*------------------------------------------------------------------------------  
Module Name: PD6 (ICP1) pin rising edge capture interrupt program  
impact: Store captured value in arr[16]  
    ___ ___  
   | | | |  
___| |_________| |__________  
   |

//------------------------------------------------

Use M64, T3, crystal 7.3728, GCC 20040214

1 
void timer1_init(void)  
{  
 TCCR3B = 0x00; //stop  
 TCNT3H = 0x00; //setup  
 TCNT3L = 0x00;  
 ICR3H = 0x00;  
 ICR3L = 0x08;  
 TCCR3A = 0x00;  
/*Connect the DATA pin of the integrated receiver to the PE7 (ICP3) pin of ATmega64, and use the rising edge capture method to decode*/  
/*The crystal oscillator is 7.3728M, divided by 8*/  
 TCCR1B = 0xC2; //start Timer @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@change 
}  
2

SING(XXXXXXXXXXXXXXX) 
{     
    uint value;  
    value=ICR3L;                     
    value|=(uint)(ICR3H << 8);   
    TCNT3H = 0x00;   
    TCNT3L = 0x00;   
    times++;    
    if(times>18)&&(times<35){  
      //Save from the 19th rising edge to the 34th, there are 36 rising edges when short pressing  
      arr[index]=value;     
      index++;    
    }  
 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@changeelse 
  if(times>35)@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@change

 //else if(times>=35) //When this statement is used, the first bit of the second key value is reused by the 36th pulse of the previous key value, 
{  
        //When the 35th rising edge arrives, decoding is completed    
       times=0;  
       index=0;  
       OK_flag=1;  
    }  
}