[FONT=Yekan]#include <mega8.h>[/FONT]#include <alcd.h>
#include <delay.h>
#include <stdio.h>
#define TRIG PORTB.1
#define ECHO PINB.2
float timer;
interrupt [TIM0_OVF] void timer0_ovf_isr(void){
TCNT0=0xF8;
timer +=1;
}
void main(void){
unsigned char buffer[40];
float dis;
DDRB= 1<<1;
TCCR0=0x00;
TIMSK=0x1;
lcd_init(16);
lcd_clear();
lcd_putsf("Test");
delay_ms(500);
lcd_clear();
#asm("sei")
while (1)
{
TRIG = 1;
timer = 0;
TCNT0=0xF8;
TCCR0 = 0x01;
while(timer <= 10);
TRIG=0;
TCCR0=0x00;
TCNT0=0xF8;
timer=0;
while(ECHO==0);
TCCR0=0x01;
while(ECHO==1);
TCCR0=0x00;
dis = ((timer + (float)((TCNT0-0xF8)/8) ) /2) *0.3432;
sprintf(buffer,"Dis = %3.2f ",dis);
lcd_gotoxy(0,0);
lcd_puts(buffer);
delay_ms(500);
}
}
دیدگاه