[BSP]업무일지 - 20100603 - 임종현

오전수업
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#define DDRF (*(volatile unsigned char *)0x61)
#define PORTF (*(volatile unsigned char *)0x62)

#define DDRD (*(volatile unsigned char *)0x31)
#define PORTD (*(volatile unsigned char *)0x32)
#define PIND (*(volatile unsigned char *)0x30)

#define DDRC (*(volatile unsigned char *)0x34)
#define PORTC (*(volatile unsigned char *)0x35)
#define PINC (*(volatile unsigned char *)0x33)

#define SET_FND(num) PORTF=((num%10)+((num/10)<<4))
#define NOP() asm volatile ("nop");
#define DELAY_MS 400  //딜레이 시간설정
#define FIRST 0

int main(void)
{
 unsigned int us = 0; //10^-6
 unsigned int ms = 0; //10^-3
 unsigned char fnd;
 unsigned char start;
 DDRF= 0xff;  //FND 연결
 PORTF = 0x00;  

 DDRD = 0xf2;  //스위치
 PORTD = 0x00;  

 if(FIRST)
 {
  fnd = 0;
  start = 1;
 }
 else
 {
  fnd = 10;
  start = 0;
 }

 while(1)
  {
  
   if(PIND&0x01)
   {
    start = 1;
     if(fnd>100) //12345678910..21~
     {
      fnd = FIRST?0:10;
     }
   }
   
   if(start)
   {
    SET_FND(fnd);//20
    fnd++;//29
    
    if((fnd%10)==0)
    {
     start = 0;
     fnd+=10; //fnd의 값
     PORTD = 0x02;
    }
    
    
   }
   
   for(ms = 0; ms < DELAY_MS; ms++) //16 * ms * 1000
   {
    
    for(us = 0; us < 1000; us++)//4
    {
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     NOP();      //1   = 16
     NOP();      //1 
     NOP();      //1 
     NOP();      //1 
     
    }
    
   }
   PORTD = 0x00;
   
  }
 return 0;
 
}
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ATMega 2기를 이용하여 카운터를 연동하여 세는 실습.
강사님이 코딩한 소스이다.  





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