int0.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 : 2007-5-18 9:57:24
// Target : M16
// Crystal: 8.0000Mhz

#include <iom16v.h>
#include <macros.h>
#include"delay.h"
#define uchar	unsigned char
#define uint	unsigned int
 
 uchar temp=0;
unsigned char abc[17]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6,
                        0xee,0x3e,0x9c,0x7a,0x9e,0x8e,0x00};


//----------------SPI初始化------------//
void SPI_init(void)
{
 DDRB&=0xbf;
 SPCR=(1<<SPE)|(1<<DORD)|(1<<MSTR)|(1<<SPR1);
}
//-------------------SPI发送数据-----------//
void SPI_send(unsigned char i)
{
 SPDR=i;
 while((SPSR&0x80)==0x00);
}


void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0xFF;
 PORTB = 0x00;
 DDRB  = 0xFF;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}

#pragma interrupt_handler int0_isr:2
void int0_isr(void)
{
   uchar i;
   
   CLI();
   {
       for(i=0;i<5;i++)
	       {
		      delay_nus(1000);
		      if((PIND&0X04)==0X04)
			        {
			          return;
			        }
		   }
		while((PIND&0X04)!=0X04);//等待高电平
		delay_nus(2900);//延时4.8ms
		for(i=0;i<8;i++)
		    { 
		      while((PIND&0X04)!=0X04);//等待高电平
		      delay_nus(480);//延时480us
		      if(PIND&0X04)
		                {
						  temp=temp>>1;
			              delay_nus(200);//
						  temp|=0x80;		//数据写入1	 
			             }
	            else
		                 {
						   temp=temp>>1;
			               temp&=0x7f;   //数据写入0
			             }
		    }
		
   }
     while((PIND&0X04)!=0X04);//等待高电平
    delay_nus(480);//延时480us
  
   if(!(PIND&0X04))
		             
		 {
		  return;
	     }
	/*if(temp==0x06)
	{
	  PORTA=temp;
	  SPI_send(abc[temp]);
	 
	  
	}*/
	else
	{				  
	 PORTA=temp; 
	 SPI_send(abc[temp]);
	 
	}
    SEI();
}

//call this routine to initialize all peripherals
void main(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 SPI_init();
 MCUCR = 0x02;
 GICR  = 0x40;
 TIMSK = 0x00; //timer interrupt sources
 SPI_send(abc[16]);
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
 while(1)
 {
  
		
 }
}