pinlv.c

频率计

#include <mega16.h>  
#include <delay.h>
#include "chuankou.c"
unsigned char i=0,j=0;
long m=0;
long n=0;
main()
{PORTB.1=1;
 DDRB.1=0;
 TCCR0=0X04;
 TCNT0=0X06;
 TCCR1B=0X06;
 TCNT1=0;
 TIMSK|=0X05;
 SREG=0X80;

 /*while (1)
 {delay_ms(50);
    }  */

}     
interrupt [10] void ill(void) 
{ TCNT0=6;
 i++;
 if(i>=125)
 { i=0;n=TCNT1; TCNT1=0; 
 m=(long)65535*j+n;
 if(m<=1000) xianshi(m,0);
 else xianshi(m,3);
  j=0; 
 }
  
} 
interrupt [9] void all(void)
{ j++;
}