ايران ويج

دوست عزیز مدار مشکل پیدا کرده بود مثل اینکه قطعی داشت دادم به خودش درستش کنه فق می مونه برنامه اش که یکی بهم توضیح بدهاین برنامه اش هست:
#include <mega8.h>
#include <delay.h>
#include <stdio.h>

unsigned char distanc;
char flag;
char ovf=0;
// Alphanumeric LCD Module functions
#asm
.equ __lcd_port=0x18 ;PORTB
#endasm
#include <lcd.h>
#define nop #asm("nop")

void send_sound()
{
char i;
for(i=0;i<20;i++)
{
PORTC=0b0000111;
delay_us(11);nop;nop;nop;
PORTC=0b0111000;
delay_us(11);nop;nop;nop;
}
PORTC=0b0000000;
}

void main(void)
{
PORTB=0x00;
DDRB=0xFF;

PORTC=0x00;
DDRC=0b1111111;

PORTD=0x00;
DDRD=0x01;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: 1000.000 kHz
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: On
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x02;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;


// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: rising Edge
// INT1: Off
// INT2: Off
GICR|=0x40;
MCUCR=0x02;
MCUCSR=0x00;
GIFR=0x40;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
//while(1)send_sound();
// LCD module initialization
lcd_init(16);


lcd_putsf("Ultrasonic");
delay_ms(1000);
lcd_clear();



while (1)
{
unsigned long int sum;
char i;
sum=0;

for(i=0;i<5;i++)
{
flag=1;
while(flag)
{
PORTD.0=1; //disabling reciver
#asm("cli")
TCCR1B=0x00;//timer off
TCNT1 =0x00;//meghdare timer dar in register mibashad

send_sound();
TCCR1B=0x02; ///geting time(on timer)

delay_ms(1);//baraye door shodane seda 1ms sabr mikonad
PORTD.0=0;//faal kardane reciver

#asm("sei") //rah andazie intrrupt
delay_ms(20);//montazere interrupt baraye 6 metr raftobargasht seda mimanad
}
TCCR1B=0x00; //timer khanmoosh
sum+=distanc;//jam kardane faseleha ba ham baraye miangin giri
}
distanc=sum/5;//miangin

lcd_clear();

if(distanc>500)lcd_putsf("Out Of Range");

lcd_gotoxy(0,0);
lcd_putchar((distanc%10000)/1000+'0');
lcd_putchar((distanc%1000)/100+'0');
lcd_putchar(',');
lcd_putchar((distanc%100)/10+'0');
lcd_putchar((distanc%10)/1+'0');
lcd_putsf(" cm");
};
}

// External Interrupt 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
distanc=TCNT1/57.029;
#asm("cli")
flag=0;
}