ocr0.c

单片机红外控制发射与接收,红外发射是一种常用的控制方式

//ICC-AVR application builder : 2007-5-16 1:38:35
// Target : M16
// Crystal: 8.0000Mhz

#include <iom16v.h>
#include <macros.h>
#include"delay.h"

void header(void)
{
                       PORTB=0x08;
	                   DDRB=0x08;
	                   delay_nus(5200);
	                   DDRB=0x00;
	                   delay_nus(2600); //header
}
void data_1(void)
{
                       DDRB=0x08;
	                   delay_nus(310);
	                   DDRB=0x00;
	                   delay_nus(640); 
}
void data_0(void)
{
                       DDRB=0x08;
	                   delay_nus(310);
	                   DDRB=0x00;
	                   delay_nus(320); 
}
void end(void)
{
                       DDRB=0x08;
	                   delay_nus(310);
	                   DDRB=0x00;
	                   delay_nus(640); 
}

void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0x00;
  PORTC=0xff; 
  DDRC=0x0f;
 //PORTC = 0x00; //m103 output only
 //DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}
//-----------------------timer0----------------//
//TIMER0 initialize - prescale:8
// WGM: CTC
// desired value: 39KHz
// actual value: 38.462KHz (-1.4%)
void timer0_init(void)
{
 TCCR0 = 0x00; //stop
 TCNT0 = 0x00; //set count
 OCR0  = 0x0C;  //set compare
 TCCR0 = 0x1A; //start timer
}
//-------------------------timer1-----------//




//call this routine to initialize all peripherals
void main(void)
{
 unsigned char abc;
 
 unsigned char keyval1,keyval2;
 unsigned char i=0;
 //abc=EEPROM_read(0x14);
 //delay_1us();
 //OSCCAL=abc;
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 timer0_init();
 //timer1_init();
 
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
 while(1)
    {
	//PORTB=0x00;
	//DDRB=0x08;
	scan_key();
	keyval1=scan_key();
     if (keyval1!=0x7f)
        {
         do
            {
             keyval2=scan_key();
            }
          while (keyval1==keyval2);
        }
     switch(keyval1)   
         {  
            case 1:  //PORTB=0x01;
			           header();
					   data_1();
					   data_0();
					   data_0();
					   data_0();
					   data_0();
					   data_0();
					   data_0();
					   data_0();
					   end();
			           
				   break;
				   
            case 2:  //PORTB=0x02;
			          header();
					  
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
	                   
			          break;
            case 3:  //PORTB=0x03; 
			          header();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			              break; 
            case 4:  //PORTB=0x04;
			          header();
					  data_0();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 5:  //PORTB=0x05;
			          header();
					  data_1();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 6:  //PORTB=0x06;
			          header();
					  data_0();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 7:  //PORTB=0x07;
			          header();
					  data_1();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;  
            case 8:  //PORTB=0x08;
			           header();
					  data_0();
					  data_0();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 9: // PORTB=0x09;
			          header();
					  data_1();
					  data_0();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end(); 
			      break;            
            case 10: //PORTB=0x0a;
			           header();
					  data_0();
					  data_1();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 11: //PORTB=0x0b;
			          header();
					  data_1();
					  data_1();
					  data_0();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;
            case 12: //PORTB=0x0c;
			           header();
					  data_0();
					  data_0();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;         
            case 13: //PORTB=0x0d;
			          header();
					  data_1();
					  data_0();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			       break;            
            case 14: //PORTB=0x0e; 
			           header();
					  data_0();
					  data_1();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
			      break;
            case 15: //PORTB=0x0f;
			          header();
					  data_1();
					  data_1();
					  data_1();
					  data_1();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end(); 
			      break;
            case 0: //PORTB=0x00;
			           
			           header();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  data_0();
					  end();
	                       
			         break;
 
          default: break;
        }   
	
	}
 
 
}

//--------------------4x4key-----------------------------------//
unsigned char scan_key(void)   //不作按键释放检查的键盘扫描函数
{
 unsigned char i,temp;
 DDRC=0x0f;
 PORTC=0xff;
 for(i=0;i<4;i++)
   {
    PORTC=~(1<<i);
    delay(10);
    temp=PINC&0xf0;
    if(temp!=0xf0)
       {
        delay(15);
        temp=PINC&0xf0;
        if(temp!=0xf0)
           {
           temp&=0xf0;
           switch(temp)
                 {
                  case 0x70: temp=15-(3-i)*4;  break;
                  case 0xb0: temp=14-(3-i)*4;  break;
                  case 0xd0: temp=13-(3-i)*4;  break;
                  case 0xe0: temp=12-(3-i)*4;  break;
                  default:temp=0x7f;
                 }
            return temp;
           }
       }
    PORTC=0xff;
   }
  return 0x7f;
}


unsigned char keypad(void)   //有按键释放检查的键盘扫描函数
{
  unsigned char temp1,temp2;
  temp1=scan_key();
  if (temp1==0x7f)
      return 0x7f;
  do 
      temp2=scan_key();
  while (temp1==temp2);
  return temp1;

}


unsigned char EEPROM_read(unsigned int uiAddress)
{
while(EECR&(1<<EEWE));
EEAR=uiAddress;
EECR|=(1<<EERE);
return EEDR;
}