Interfacing Ultrasonic Sensor HC-SR04 with PIC Microcontroller

hi guys; tried this code on the PIC16F877A and it works well. I'm using it in an application where I need to monitor a liquid level. Every time the liquid level decreases (increase in distance), another routine must be triggered (i.e. send sms to the user).
Could somebody please tell me how I can go about doing this. I know it sounds easy but I just can't seem to do it. I'm using MPLABX, XC8. thanks in advance

Hi guys, when I compile the code in mikroC pro, it shows an error that is "17 304 error: Can't open include file "xc.h" #include <xc.h> 1 error in preprocessor. C:\Users\Mushfiq Fuad\Desktop\New folder\MyProject.c". What should I do now?

hi please tell me how for loop use in this programe

HOW USE THIS RANGES 1065244 AND 2130483

//in above program use unnecessary like loops and show wrong value of time as you show in above lcd pic.

/////////////////////////////////////simple code////////////////////////////////////////////////////////////////////////////
/*
* File: LCD8bit.c
* Author: HP
*
* Created on December 6, 2017, 8:35 AM
*/

#define _XTAL_FREQ 20000000
#include <xc.h>
#include<stdlib.h>
#include<stdio.h>
__PROG_CONFIG(1,0x3F32);
//***********************************************************
#define LCD_DATA_PORT PORTB
#define LCD_DATA_PORT_DIR TRISB
#define RS_PIN PORTCbits.RC0
#define RS_PIN_DIR TRISCbits.TRISC0
#define RW_PIN PORTCbits.RC1
#define RW_PIN_DIR TRISCbits.TRISC1
#define ENABLE_PIN PORTCbits.RC2
#define ENABLE_PIN_DIR TRISCbits.TRISC2
//************************************************************
#define Trigger RD1 // Trigger pin
#define Echo RD2// Echo pin

//Function init************************************************************
void Lcd_Clear();
void LCD_Init(void);
void Toggle_Enable(void);
void LCD_Send_Data(unsigned char Data);
void LCD_Send_Command(unsigned char Command);
void Lcd_Set_Cursor(unsigned char a,unsigned char b);
//************************************************************

void Toggle_Enable(void)
{
ENABLE_PIN=1;
__delay_us(10);
ENABLE_PIN=0;
}

//************************************************************
void LCD_Send_Command(unsigned char Command)
{
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=Command;
Toggle_Enable();
__delay_ms(5);
}

//************************************************************
void Lcd_Set_Cursor(unsigned char a,unsigned char b)
{
char temp;
if(a==1)
{
temp = 0x80 + b - 1;
LCD_Send_Command(temp);
}
else
{
temp = 0xC0 + b - 1;

LCD_Send_Command(temp); //Set Column
}
}
//************************************************************
void LCD_Init(void)
{
//Wait for 100 mSec
__delay_ms(100);
//*********************************************************
LCD_Send_Command(0x30);
//*********************************************************
__delay_ms(10);
//*********************************************************
LCD_Send_Command(0x30);
//*********************************************************
__delay_ms(10);
//*********************************************************
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x30;
Toggle_Enable();

//font=0,and n=1********************************************
__delay_ms(100);
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x38;
Toggle_Enable();
__delay_ms(50);

//display 0ff**********************************************
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x08;
Toggle_Enable();
__delay_ms(50);

//********************************************************
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x0C;
Toggle_Enable();
__delay_ms(50);

//display clear********************************************
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x01;
Toggle_Enable();
__delay_ms(50); //delay so that the command can be
//executed by LCD Controller

//entry mode set*******************************************
RS_PIN=0;
RW_PIN=0;
LCD_DATA_PORT=0x06;
Toggle_Enable();
__delay_ms(50); //delay so that the command can be
//executed by LCD Controller

}

//************************************************************
void LCD_Send_Data(unsigned char Data)
{
RS_PIN=1;
RW_PIN=0;
LCD_DATA_PORT=Data;
Toggle_Enable();
__delay_ms(50);
}
//init of variables************************************************************
unsigned int time_taken=0;
unsigned int distance;
unsigned int t0=0,t1=0,t2=0,t3=0,t4=0,t5=0,t6=0,t7=0;
unsigned int d1,d2,d3;

void main(void)
{

TRISD1 = 0; //Trigger pin of US sensor is sent as output pin
TRISD2 = 1; //Echo pin of US sensor is set as input pin
TRISC =0X00;
PORTC=0X00;
T1CON=0x20;
LCD_Init();
//Make the LCD data port an output
LCD_DATA_PORT_DIR=0x00;
//Make the RS pin an output
RS_PIN_DIR=0;
//Make the RW pin an output
RW_PIN_DIR=0;
//Make the Enable pin an output
ENABLE_PIN_DIR=0;

unsigned char i;
LCD_Init();

Lcd_Set_Cursor(1,1);

LCD_Send_Data('S');
LCD_Send_Data('H');
LCD_Send_Data('A');
LCD_Send_Data('R');
LCD_Send_Data('Y');
LCD_Send_Data(' ');

LCD_Send_Data('H');
LCD_Send_Data('M');
LCD_Send_Data('Z');
LCD_Send_Data('A');

LCD_Send_Data(' ');
LCD_Send_Data('R');
LCD_Send_Data('O');
LCD_Send_Data('M');
LCD_Send_Data('A');
LCD_Send_Data('N');

__delay_ms(2000);

Lcd_Set_Cursor(2,1);

LCD_Send_Data('D');
LCD_Send_Data('I');
LCD_Send_Data('S');
LCD_Send_Data('T');
LCD_Send_Data('A');
LCD_Send_Data('N');
LCD_Send_Data('C');
LCD_Send_Data('_');
LCD_Send_Data('_');
LCD_Send_Data('M');
LCD_Send_Data('E');
LCD_Send_Data('A');
LCD_Send_Data('S');
LCD_Send_Data('U');
LCD_Send_Data('R');
LCD_Send_Data('E');

__delay_ms(2000);

LCD_Send_Command(0X01);

while(1)
{
TMR1H =0; TMR1L =0; //clear the timer bits

Trigger = 1;
__delay_us(10);
Trigger = 0;

while (Echo==0);
TMR1ON = 1;
while (Echo==1);
TMR1ON = 0;

time_taken = (TMR1L | (TMR1H<<8));
distance= (0.0272*time_taken)/2;
time_taken = time_taken * 0.8;

t0=time_taken/10000;
t1=time_taken%10000;
t2=t1/1000;
t3=t1%1000;
t4=t3/100;
t5=t3%100;
t6=t5/10;
t7=t5%10;

d1 = (distance/100)%10;
d2 = (distance/10)%10;
d3 = (distance/1)%10;

Lcd_Set_Cursor(1,1);
LCD_Send_Data('T');
LCD_Send_Data('I');
LCD_Send_Data('M');
LCD_Send_Data('E');
LCD_Send_Data(':');

LCD_Send_Data(t0+'0');
LCD_Send_Data(t2+'0');
LCD_Send_Data(t4+'0');
LCD_Send_Data(t6+'0');
LCD_Send_Data(t7+'0');
LCD_Send_Data(' ');
LCD_Send_Data('u');
LCD_Send_Data('s');

Lcd_Set_Cursor(2,1);
LCD_Send_Data('D');
LCD_Send_Data('I');
LCD_Send_Data('S');
LCD_Send_Data('T');
LCD_Send_Data('A');
LCD_Send_Data('N');
LCD_Send_Data('C');
LCD_Send_Data('E');
LCD_Send_Data(':');

LCD_Send_Data(d1+'0');
LCD_Send_Data(d2+'0');
LCD_Send_Data(d3+'0');
LCD_Send_Data(' ');
LCD_Send_Data('c');
LCD_Send_Data('m');
__delay_ms(1000);
}
return;
}

sir,
Here you used to see the output in LCD display...But I want to see the same result in the system using any software like MPLAB? How can I sir?
And I hope that I will get your guidance.

I need the code file please help

please send the code to my email 

m.ehsan.hammal@gmail.com

and thank you very much please help me i need the project 

Hi! how can i implement the code in mikroc and can i use a simple 5v battery instead of voltage reg for US. also how should i power the lcd?
elaborate briefly.
reply asap

  Hello sir,

I am a final year student studying Electrical and Electronic Engineering, I am using a part of this code to display information on a LCD from a PIC. I am having trouble understanding this part of the code below, would you be able to elaborate?

(distance/100)%10;
(distance/10)%10;
(distance/1)%10;

(d1+'0');

why does it divide by 100 and then divide by 10%

why does it divide by 100, 10 and 1. 

and why do we need a +'0' when printing the characters on LCD?

Thank you for uploading this code, kind regards

Patrick

Hi, what microcontroller are you using?

I think at this part of the code :

t1 = (time_taken/1000)%10;

you should have put 10000  , not 1000