ruben91
Junior Member level 3
i write a code to test my HC-SR04 sensor to measure distance but seem there is no responce from the sensor, after i program and when i turn on the pic, the LED from port A0 turn on and not turn off even i move more than 100 cm..pls help
i'm using pickit 2, mplab ide wit c18 compiler, internal OSC 4Mhz.. tq
i'm using pickit 2, mplab ide wit c18 compiler, internal OSC 4Mhz.. tq
Code:
#include<p18f1330.h>
#include<delays.h>
//#include <stdio.h>
//#include <stdlib.h>
#include <math.h>
#pragma config OSC=INTIO2
#pragma config WDT=OFF
#pragma config PWMPIN = OFF
#define Trig PORTBbits.RB3
#define Echo PORTBbits.RB2
void Call_Init_PIC (void);
void sendPulse(void);
void T0Delay10us(void);
void delay2(void);
unsigned int distance ;
unsigned int time;
void main(void)
{
OSCCONbits.IRCF2 = 1;
OSCCONbits.IRCF1 = 1;
OSCCONbits.IRCF0 = 0;
TRISAbits.TRISA0=0;
TRISAbits.TRISA1=0;
Call_Init_PIC ();
while(1)
{
//T1CON=0x0;
TMR1H= 0;
TMR1L= 0;
sendPulse();
while(Echo == 0);
T1CONbits.TMR1ON = 1;
while(Echo == 1);
T1CONbits.TMR1ON = 0;
//Delay10KTCYx(255);
time= TMR1H;
time= time<<8;
time= time|TMR1L;
distance = (.0017* time);
Delay10KTCYx(100);
PIR1bits.TMR1IF=0;
/*
time = (TMR1L | (TMR1H<<8)); //Reads Timer Value
time = time/58.82; //Converts Time to Distance
time = time + 1; //Distance Calibration\
if(time>=2 && time<=6)
{
PORTBbits.RB0=1;
Delay10KTCYx(255);
PORTBbits.RB0=0;
Delay10KTCYx(255);
}
*/
//if(time>=7)
//{
//PORTBbits.RB1=1;
//}
if(distance<=100)
{
LATAbits.LATA0=1;
Delay10KTCYx(100);
LATAbits.LATA0=0;
Delay10KTCYx(100);
}
if(distance>=101)
{
LATAbits.LATA0=0;
Delay10KTCYx(100);
LATAbits.LATA1=1;
}
}
}
void Call_Init_PIC (void)
{
TRISBbits.TRISB3=0;
TRISBbits.TRISB2=1;
}
void sendPulse(void)
{
Trig=1;
Delay10TCYx(1);
Trig=0;
Delay10KTCYx(255);
Delay10KTCYx(255);
}
/*
void T0Delay10us()
{
T0CON=0x00;
TMR0H=0XFF;
TMR0L=0XCD;
T0CONbits.TMR0ON=1;
while(INTCONbits.TMR0IF==0);
T0CONbits.TMR0ON=0;
INTCONbits.TMR0IF=0;
}
void delay2()
{
Delay1TCY();
Delay1TCY();
Delay1TCY();
Delay1TCY();
Delay1TCY();
}
*/