HC-SR04_on_XpressBoard_main.c

/*
 * File:   main.c
 * Author: [email protected]
 *
 * Created on 3/18/2017 8:09:13 AM UTC
 * "Created in MPLAB Xpress"
 * Full code you can see : https://mplabxpress.microchip.com/mplabcloud/example/details/306
 */


#include <xc.h>

#include "mcc.h"
#include <htc.h>

#define Trig_Pin LATCbits.LATC5
#define Echo_Pin PORTCbits.RC6

unsigned long pulseIn() {
    while(Echo_Pin == 0) ;
    unsigned long time_t = 0;
    while(Echo_Pin == 1) {
        __delay_us(1);
        time_t++;
    }
    return time_t;
}

void main(void) {
    SYSTEM_Initialize();
    
    TRISA = 0xF0;
    TRISCbits.TRISC5 = 0; // Set RC5 to OUTPUT
    TRISCbits.TRISC6 = 1; // Set RC6 to INPUT
    
    LATA = 0x01;
    while(1) {
        Trig_Pin = 0;
        __delay_us(5);
        Trig_Pin = 1;
        __delay_us(10);
        Trig_Pin = 0;
        unsigned long PulseWidth = pulseIn();
        unsigned int distance = PulseWidth * 0.0173681;
        distance = distance < 5 ? 0 : (distance > 8 ? 3 : distance - 5);
        LATA = 0x01<<(distance);
        __delay_ms(100);
    }
    return;
}