红外解码.txt

keil c中通过

/*----------基于uPD6121/LC7461M/HT6222/AS6122等红外编码芯片的解码程序------------
            作者：Benny
            Blog:http://bennylo.mcublog.com/
            Email:[e-mail]
            MCU: ATmega16
            Crystal: 6.0000Mhz
*/
＃i nclude <iom16v.h>
＃i nclude <macros.h>
#define uint unsigned int
#define uchar unsigned char  
#define ulong unsigned long
/*------------------------------显示-----------------------------------*/
#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)
{    //四位共阴数码管，十六进制显示
     LED_DATA=tab[(uchar)((dis_data&0xf000)>>12)];   //显示千位
     PORTD=0xf7;                
     delay();                                       //延时
  
     LED_DATA=tab[(uchar)((dis_data&0x0f00)>>8)];   //显示百位
     PORTD=0xfb; 
     delay();                                       //延时
                          
     LED_DATA=tab[(uchar)(dis_data&0x00f0)>>4];     //显示十位
     PORTD=0xfd;
     delay();                                        //延时
     
     LED_DATA=tab[(uchar)dis_data&0x000f];           //显示个位
     PORTD=0xfe;
     delay();                                      //延时 
}
void port_init(void)
{
 PORTA = 0xFF;
 DDRA  = 0x00;
 PORTB = 0xFF;
 DDRB  = 0xFF;
 PORTC = 0xFF; 
 DDRC  = 0xFF;
 PORTD = 0xFF;
 DDRD  = 0x0F;
}
void timer1_init(void)
{
 TCCR1B = 0x00; //stop
 TCNT1H = 0x00; //setup
 TCNT1L = 0x00;
 ICR1H  = 0x00;
 ICR1L  = 0x08;
 TCCR1A = 0x00;
/*一体化接收头的DATA引脚接到ATmega16的PD6(ICP1)引脚，采用上升沿捕捉的方法解码*/
/*晶振为6M,无分频，用8M太大（分频则太小）*/
 TCCR1B = 0x41; //start Timer
}
uint arr[16];//保存捕捉值
uchar times;//记录捕捉次数
uchar index;//数组索引
uchar ir_code;//红外遥控键码
uchar OK_flag;//解码完毕标志
/*------------------------------------------------------------------------------
模块名称：PD6(ICP1)引脚上升沿捕捉中断程序
影响：    将捕捉值保存在arr[16]中
    ___           ___
   |   |         |   |
___|   |_________|   |__________
   |<-----t----->|
                   DEC                  HEX  
t=9ms          计数值＝54000          0xD2F0
t=4.5ms        计数值＝27000          0x6978
t=2.25ms       计数值＝13500          0x34BC
t=1.125ms      计数值＝6750           0x1A5E

------------------------------------------------------------------------------*/
#pragma interrupt_handler timer1_capt_isr:6
void timer1_capt_isr(void)
{   
    uint value;
    value=ICR1L;    
    //CLI();               
    value|=(uint)(ICR1H << 8); 
    TCNT1H = 0x00; 
    TCNT1L = 0x00; 
    times++;  
    if(times>18&&times<35){
      //从第19个上升沿开始保存，直到第34个，短按时共有36个上升沿
      arr[index]=value;	
      index++;  
    }
    else if(times>=35){
        //第35个上升沿到来时，解码完毕  
       times=0;
       index=0;
       OK_flag=1;
    }
    TCNT1=0;
    //SEI();
}
/*------------------------------解码程序----------------------------------------
结果:得到uchar型的键码ir_code,如果解码出错，则ir_code=0xff
-----------------------------------------------------------------------------*/
void get_code(void){
        uchar i,dat,/*键码*/_dat;/*键码反码*/
        uint temp=0;
        for(i=0;i<16;i++){
           if(arr[i]<7000){
             //“0”
             temp<<=1;
           }
           if(arr[i]>13000){
             //“1”
             temp<<=1;
             temp|=1;			 	   
           }   		   
        }
        _dat=(uchar)(temp&0x00ff);/*键码*/	
        dat=(uchar)((temp>>8)&0x00ff);/*键码反码*/
           /*“键码”与“键码反码相与，如果为0则解码正确*/		
        if((dat&_dat)==0){
           ir_code=dat;
    	}
        else{
           TCNT1H = 0x00; 
           TCNT1L = 0x00; 
           ir_code=0xff;//解码出错
    	}	
        times=0;
        index=0;
}
void init_devices(void)
{
 CLI(); 
 port_init();
 timer1_init();
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x20; 
 SEI(); 
}
void main(void){
 uchar i;
 init_devices();

 while(1){

            if (OK_flag){
               get_code();//解码
               OK_flag=0;			
    		}
            for(i=0;i<200;i++){
              dis_int(ir_code);//显示键码			
            }			

      } 
}