READING A PUSHBUTTON & display on LCD - Page 6 - Electronic Circuits Projects Diagrams Free

AtomSoft · 14th September 2009, 09:05 PM

what do you want it to do? It works fine for me. when i press up or down it says

[cm]
01

AtomSoft · 14th September 2009, 09:16 PM

Here you go complete:

Code:

#include <pic.h>
#include "pic.h"
#include "delay.h"
#include "math.h" 
#include <stdio.h>
#include <stdlib.h>	//

void userMenu(char pos); //  
void FloatToStr(float , char[]); 
void DelayMs(unsigned char);
void lcd_cmd(unsigned char);
void lcd_data(unsigned char); 
void lcd_clear(void);
void lcd_puts(const char[]);
void lcd_goto_L1(void);
void lcd_goto_L2(void);
void lcd_cursor(unsigned char);
void lcd_init(void);
void init(void);
char WaitForInput(void);
unsigned char user_input(void);
void home_screen(void);
void EnterHeight(void);
void EnterScreen(void);
void ShowDigits(unsigned char val);
void main(void);

 

void calc_distance(void);


      

#define LCD_RS RC0		//LCD RS pin
#define LCD_EN RC1		//LCD EN pin
#define LCD_STROBE()	LCD_EN = 1; asm("nop"); asm("nop"); LCD_EN = 0

unsigned char cm10;		//
unsigned char cm;		//
unsigned int math;		// used for voltage calculations
unsigned char NumDec;
unsigned char NumSep[2];
   
unsigned char i,j,k;
char temp[8];
//[/b]
unsigned char height=50;
unsigned char range;
unsigned char area;
unsigned char SensorPos=10;
//[/b] New Vars
char input_sw;

  
char mnuPOS;

unsigned char MyVal;
unsigned char MyValLCD[2];
unsigned char MyMaxVal;
unsigned char MyMinVal;


unsigned char ;

#define HOME_SW RC2				//HOME switch	
#define INCREASE_SW RC3			//INCREASE switch
#define DECREASE_SW RC4			//DECREASE switch
#define ENTERSETTINGS_SW RA4	//ENTERSETTINGS switch



///////////////////////CONVERT FLOAT TO STRING///////////////////
// This function was taken from the CAVR library. It was modified slightly
// to suit our design.
void FloatToStr(float n, char str[])
{
float scale;
unsigned char d,f;
f=0;i=0;
if (n<0.0) {n=-n; str[f]='-'; f++;};
n=n+0.005;
scale=1.0;
while (n>=scale) {scale=scale*10.0; ++i;};
if (i==0) {str[f]='0'; f++;}
else
while (i--)
	  {
      scale=floor(0.5+scale/10.0);
      d=(unsigned char) (n/scale);
      str[f]=d+'0';
      n=n-scale*d;
	  f++;
      };

str[f]='.';
f++;
for (j=0;j<=1;j++) //2 decimal points
      {
      n=n*10.0;
      d=(unsigned char) n;
      str[f]=d+'0';
      n=n-d;
	  f++;
	  };
str[f]='\0';
}
///////////////////END CONVERT FLOAT TO STRING///////////////////

/////////////////////////////DELAY///////////////////////////////
void DelayMs(unsigned char cnt)
{
#if	XTAL_FREQ <= 2MHZ
	do {
		DelayUs(996);
	} while(--cnt);
#endif

#if    XTAL_FREQ > 2MHZ	
	unsigned char	p;
	do {
		p = 4;
		do { 
			DelayUs(250);
		} while(--p);
	} while(--cnt);
#endif
}

void DelayS(unsigned char cnt)
{
	for (j=0; j<(cnt*10); j++)
		DelayMs(100);
}
///////////////////////////DELAY END/////////////////////////////

//////////////////////////////LCD SETUP//////////////////////////
/* send a command to the LCD */
void lcd_cmd(unsigned char c)
{
	DelayMs(2); //wait for LCD to be ready shorter delay 
	LCD_RS = 0;	 //write instruction
	PORTB = (c & 0xF0); //load upper nibble on LCD data lines
	LCD_STROBE(); //send instruction to LCD
	PORTB = ((c << 4) & 0xF0); //load upper nibble on LCD data lines
	LCD_STROBE(); //send instruction to LCD   	
}

/* send data to the LCD */
void lcd_data(unsigned char c)
{
	DelayMs(2); //wait for LCD to be ready shorter delay 
	PORTB = 0x00;
	LCD_RS = 1; //write data
    PORTB |= (c & 0xF0); //load upper nibble on LCD data lines     
	LCD_STROBE(); //send instruction to LCD
	PORTB &= 0x00; //load upper nibble on LCD data lines
	PORTB |= ( (c << 4) & 0xF0); 
	LCD_STROBE(); //send instruction to LCD
}

/*Clear the LCD*/
void lcd_clear(void)
{
	lcd_cmd(0x01); //command to clear LCD
}

/*write a string of chars to the LCD*/
void lcd_puts(const char s[])
{
	j = -1;
	while(s[++j]!=('\0')) // send characters until null character reached
		lcd_data(s[j]);
}

/*go to beginning of line 1*/
void lcd_goto_L1(void)
{
	lcd_cmd(0b10000000); // command to go to line 1
}

/*go to beginning of line 2*/
void lcd_goto_L2(void)
{
	lcd_cmd(0b11000000); // command to go to line 2
}

/*move cursor "x" positions to the right*/
void lcd_cursor(unsigned char x)
{
	lcd_cmd(((x)&0x7F)|0x80); 
}

/*initialise the LCD - put into 4 bit mode*/
void lcd_init(void)
{
	LCD_RS = 0;	
	LCD_EN = 0;
	DelayMs(20); //wait for LCD startup
	lcd_cmd(0x02);
 
	lcd_cmd(0x28);	// 4-bit mode
	lcd_cmd(0x08);	// display off
	lcd_cmd(0x01);	// clear display
	lcd_cmd(0x0C);	// disp. on, cursor off, cursor blink off
	lcd_cmd(0x06);	// entry mode
	lcd_cmd(0x80);  // initialise DDRAM address to zero
}
//////////////////////////LCD SETUP END//////////////////////////
   

void init(void)
{   
	
	MyVal = 0; //initializn these variables here
	MyMinVal = 0;
	MyMaxVal = 99;
    OSCCON|=0x60; //set fosc to 4Mhz
	TRISB=0x00; 
	TRISC=0xFC;
    TRISA = 0b10010010; 	// RA7 high imp, RA3 is serial out, RA4 button input 
	ANSEL=0x02;            //set RA1 as analog input for GP2 sensor
	ANSELH=0x00;
	lcd_init(); //call LCD initialisation
}

char WaitForInput(void){
char done;
char temp;
done = 0;

while(!done){
    if(!ENTERSETTINGS_SW){
        temp = 1;
        done = 0xff;
    }

    if(!HOME_SW){
        temp = 2;
        done = 0xff;
    }

    if(!INCREASE_SW){
        temp = 3;
        done = 0xff;
    }

    if(!DECREASE_SW){
        temp = 4;
        done = 0xff;
    }
}//end of while
    DelayMs(150);    //debounce
    return temp;
}//
void userMenu(char pos){
	lcd_clear();
	lcd_goto_L1();

	switch(pos){
		case 0:
			lcd_puts("    HEIGHT    ");
			break;		
		case 1:
			lcd_puts("    RANGE     ");
			break;		
		case 2:
			lcd_puts(" SURFACE AREA ");
			break;		
	}

	lcd_goto_L2();
	lcd_puts("Press Up/Down"); //home screen message (line 2)
}
// New Menu System
void EnterHeight(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER HEIGHT ");
	lcd_goto_L2();
	lcd_puts("Press Up/Down"); //home screen message (line 2)
}

void EnterScreen(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" [cm] ");
}

void ShowDigits(unsigned char val){

    MyValLCD[0] = val /10;    //returns the quotient (if temp = 35 the result is 3)
    MyValLCD[1] = val % 10; 	//Returns remainder   (if temp = 35 the result is 5)

	MyValLCD[0] += 0x30;	//to ASCII
	MyValLCD[1] += 0x30;	//to ASCII

	EnterScreen();
	lcd_goto_L2();
	lcd_data(MyValLCD[0]);	//to LCD
	lcd_data(MyValLCD[1]);  //to LCD
}

  
void calc_distance(void)
{
	// from the transeiver datasheet the analog voltage is
	// the inverse of distance, so distance can be calculated
	// d = (1 / volts) then just scaled to suit the transeiver

	// load ADC value in 16bit math var
	math = ADRESH;
	math = (math * 256);
	math += ADRESL;

	// now invert it; (1 / volts) use (6050 / volts) for scaling
	math = (6050 / math);
	if(math >= 2) math -=2;		// fix linear error (-2)
	if(math > 99) math = 99;	// max limit at 99cm

	// convert from 0-99 to 2 decimal digits, 0-99cm
	cm10=0;
	while(math >= 10)
	{
		cm10++;
		math -= 10;
	}
	cm = math;
}
 //
unsigned char user_input(void)		//This will return what we want
{
	char done = 0;

	MyVal = 0;			//Start on 0
	while(done == 0){
   	  input_sw = WaitForInput();
		
      switch(input_sw){
		case 1:
			done = 0xff; 			//This tells us the user finished entering
			lcd_goto_L1();
			lcd_puts("     Done!      "); //home screen message (line 1)
			break;
      	case 3:
			if(MyVal < MyMaxVal)
      			MyVal++;
			EnterScreen();
			ShowDigits(MyVal);
			break;
      	case 4:
			if(MyVal > MyMinVal)
      			MyVal--;
			EnterScreen();
			ShowDigits(MyVal);
        	break;
		default: 
			break;
      }
	  
	}
	DelayS(1);
	return MyVal;
}

void home_screen(void){
	mnuPOS = 0;
	lcd_clear();
	lcd_goto_L1();
	lcd_puts("INFRARED LIQUID"); //home screen message (line 1)
	lcd_goto_L2();
	lcd_puts("LEVEL DETECTOR"); //home screen message (line 2)
  
	input_sw = 0;			//Reset the value

	while(input_sw != 1)  	//Wait until enter is pressed
		input_sw = WaitForInput();

	//EnterScreen();
	//EnterHeight();
	userMenu(0);
	DelayMs(2);				//shorter delay 
    height = user_input();	//The HEIGHT var will have the myVal

	userMenu(1);
	DelayMs(2);				//shorter delay 
    range = user_input();	//The HEIGHT var will have the myVal

	userMenu(2);
	DelayMs(2);				//shorter delay 
    area = user_input();	//The HEIGHT var will have the myVal
/*
"enter height"
call enter/settings (which is now user input function in new code)
height=MyVal

"enter range"
call user_input
range=MyVal

"enter surface area"
call user_input
area=MyVal
*/
}
 


void main(void)
{
 init();	// initialise I/O ports, LCD
 while(1){
 	home_screen();
 } 
}

fantabulous68 · 14th September 2009, 09:17 PM

well its doing the above stuff without me pressing any buttons....

o gosh i just looked at mplab config bits again.....i had saved this in a new file and it reset the config bits to default.....

im sure it will work after i set the bits correctly again.....thanx AtomSoft.....

AtomSoft · 14th September 2009, 09:18 PM

heh no problem. I made the whole menu in the new code posted. I add the range and area stuff

fantabulous68 · 14th September 2009, 09:20 PM

lol

complete

thanx

....

Yeah it sure is working smoothly...

tried it out now....

i have to start paying forward my bank balance (im not working yet lol)...if i dont start paying back in kind hehe....

AtomSoft · 14th September 2009, 09:29 PM

heh paying foward heh If you need any more help be sure to simply ask

fantabulous68 · 16th September 2009, 01:58 PM

Uhmmmm Hello AtomSoft...could you tell me why you suggest i use int instead of unsigned int....??? the distances are all going to be positive...

This is from the original code:
unsigned int math; // used for voltage calculations

Quote:

heh just dont forget in that junebug page read the comments well...

// load ADC value in 16bit math var

so..
int math

AtomSoft · 16th September 2009, 02:01 PM

Quote:

Originally Posted by fantabulous68

Uhmmmm Hello AtomSoft...could you tell me why you suggest i use int instead of unsigned int....??? the distances are all going to be positive...

This is from the original code:
unsigned int math; // used for voltage calculations

I never checked original code. Also i never said dont use unsigned int as long as its a int

Unsigned int is best in this case

fantabulous68 · 16th September 2009, 02:08 PM

O Ok...Cool. Hello AtomSoft...I wrote a test today & came home early...hehe I am attempting ADC 1st time today lol....well it looks easy to set up and stuff

...hopefully it will work when i put it in the circuit

(o else lol someone will be getting bothered

)

fantabulous68 · 16th September 2009, 02:55 PM

This compiled successfully but im not sure if im doing the part highlighted in red correctly.....I want to display the unsigned int value stored in cm to the LCD. cm=math from the calc_distance function. i commented home_screen for now. Want to get cm value displaying and will integrate it later.

Code:

#include <pic.h>
#include "pic.h"
#include "delay.h"
#include "math.h" 
#include <stdio.h>
#include <stdlib.h>	//

void userMenu(char pos); //  
void FloatToStr(float , char[]); 
void DelayMs(unsigned char);
void lcd_cmd(unsigned char);
void lcd_data(unsigned char); 
void lcd_clear(void);
void lcd_puts(const char[]);
void lcd_goto_L1(void);
void lcd_goto_L2(void);
void lcd_cursor(unsigned char);
void lcd_init(void);
void init(void);
char WaitForInput(void);
unsigned char user_input(void);
void home_screen(void);
void EnterHeight(void);
void EnterScreen(void);
void ShowDigits(unsigned char val);
void calc_distance(void);
void main(void);

unsigned int temp;
unsigned char cm2LCD;


      

#define LCD_RS RC0		//LCD RS pin
#define LCD_EN RC1		//LCD EN pin
#define LCD_STROBE()	LCD_EN = 1; asm("nop"); asm("nop"); LCD_EN = 0

unsigned char cm10;		//
unsigned char cm;		//
unsigned int math;		// used for voltage calculations
unsigned char NumDec;
unsigned char NumSep[2];
   
unsigned char i,j,k;
//char temp[8];
//[/b]
unsigned char height=50;
unsigned char range;
unsigned char area;
unsigned char SensorPos=10;
//[/b] New Vars
char input_sw;

  
char mnuPOS;

unsigned char MyVal;
unsigned char MyValLCD[2];
unsigned char MyMaxVal;
unsigned char MyMinVal;
unsigned long bres;		// for bresenham 2-second timer system

unsigned char ;

#define HOME_SW RC2				//HOME switch	
#define INCREASE_SW RC3			//INCREASE switch
#define DECREASE_SW RC4			//DECREASE switch
#define ENTERSETTINGS_SW RA4	//ENTERSETTINGS switch



///////////////////////CONVERT FLOAT TO STRING///////////////////
// This function was taken from the CAVR library. It was modified slightly
// to suit our design.
void FloatToStr(float n, char str[])
{
float scale;
unsigned char d,f;
f=0;i=0;
if (n<0.0) {n=-n; str[f]='-'; f++;};
n=n+0.005;
scale=1.0;
while (n>=scale) {scale=scale*10.0; ++i;};
if (i==0) {str[f]='0'; f++;}
else
while (i--)
	  {
      scale=floor(0.5+scale/10.0);
      d=(unsigned char) (n/scale);
      str[f]=d+'0';
      n=n-scale*d;
	  f++;
      };

str[f]='.';
f++;
for (j=0;j<=1;j++) //2 decimal points
      {
      n=n*10.0;
      d=(unsigned char) n;
      str[f]=d+'0';
      n=n-d;
	  f++;
	  };
str[f]='\0';
}
///////////////////END CONVERT FLOAT TO STRING///////////////////

/////////////////////////////DELAY///////////////////////////////
void DelayMs(unsigned char cnt)
{
#if	XTAL_FREQ <= 2MHZ
	do {
		DelayUs(996);
	} while(--cnt);
#endif

#if    XTAL_FREQ > 2MHZ	
	unsigned char	p;
	do {
		p = 4;
		do { 
			DelayUs(250);
		} while(--p);
	} while(--cnt);
#endif
}

void DelayS(unsigned char cnt)
{
	for (j=0; j<(cnt*10); j++)
		DelayMs(100);
}
///////////////////////////DELAY END/////////////////////////////

//////////////////////////////LCD SETUP//////////////////////////
/* send a command to the LCD */
void lcd_cmd(unsigned char c)
{
	DelayMs(2); //wait for LCD to be ready shorter delay 
	LCD_RS = 0;	 //write instruction
	PORTB = (c & 0xF0); //load upper nibble on LCD data lines
	LCD_STROBE(); //send instruction to LCD
	PORTB = ((c << 4) & 0xF0); //load upper nibble on LCD data lines
	LCD_STROBE(); //send instruction to LCD   	
}

/* send data to the LCD */
void lcd_data(unsigned char c)
{
	DelayMs(2); //wait for LCD to be ready shorter delay 
	PORTB = 0x00;
	LCD_RS = 1; //write data
    PORTB |= (c & 0xF0); //load upper nibble on LCD data lines     
	LCD_STROBE(); //send instruction to LCD
	PORTB &= 0x00; //load upper nibble on LCD data lines
	PORTB |= ( (c << 4) & 0xF0); 
	LCD_STROBE(); //send instruction to LCD
}

/*Clear the LCD*/
void lcd_clear(void)
{
	lcd_cmd(0x01); //command to clear LCD
}

/*write a string of chars to the LCD*/
void lcd_puts(const char s[])
{
	j = -1;
	while(s[++j]!=('\0')) // send characters until null character reached
		lcd_data(s[j]);
}

/*go to beginning of line 1*/
void lcd_goto_L1(void)
{
	lcd_cmd(0b10000000); // command to go to line 1
}

/*go to beginning of line 2*/
void lcd_goto_L2(void)
{
	lcd_cmd(0b11000000); // command to go to line 2
}

/*move cursor "x" positions to the right*/
void lcd_cursor(unsigned char x)
{
	lcd_cmd(((x)&0x7F)|0x80); 
}

/*initialise the LCD - put into 4 bit mode*/
void lcd_init(void)
{
	LCD_RS = 0;	
	LCD_EN = 0;
	DelayMs(20); //wait for LCD startup
	lcd_cmd(0x02);
 
	lcd_cmd(0x28);	// 4-bit mode
	lcd_cmd(0x08);	// display off
	lcd_cmd(0x01);	// clear display
	lcd_cmd(0x0C);	// disp. on, cursor off, cursor blink off
	lcd_cmd(0x06);	// entry mode
	lcd_cmd(0x80);  // initialise DDRAM address to zero
}
//////////////////////////LCD SETUP END//////////////////////////
    

void init(void)
{   
	
	// setup the PIC 16f690
	OSCCON = 0x72;      	// internal osc, 8MHz
	PORTA = 0;
	TRISA = 0b10010010; 	// RA7 high imp, RA3 is serial out, RA4 button input 


	
 	PORTB = 0;          	// PORTB not used
    WPUB = 1;				// PORTB pullups ON		
    RABPU = 0;


    /* Init ADC */
    ADCON0 = 0b10000101;	// bit 7 right justify,analogue channel select bits bits5-2  0001=AN1,ADC ON, RA1 is ADC input
	ADCON1 = 0b00100000;	//bits6-4  fosc/32
    ADON=1;	                // turn on the A2D conversion module

	
	ANSEL=0x02;            //set RA1 as analog input for GP2 sensor
	ANSELH=0x00;

    T1CON = 0b00010001;     // TMR1 is ON, 1:2 prescale, =1MHz
	T2CON = 0b00000101;     // TMR2 is ON, 1:4 prescale, =1MHz



	MyVal = 0; //initializn these variables here
	MyMinVal = 0;
	MyMaxVal = 99;
  
	TRISB=0x00; 
	TRISC=0xFC;
    
	lcd_init(); //call LCD initialisation
}

char WaitForInput(void){
char done;
char temp;
done = 0;

while(!done){
    if(!ENTERSETTINGS_SW){
        temp = 1;
        done = 0xff;
    }

    if(!HOME_SW){
        temp = 2;
        done = 0xff;
    }

    if(!INCREASE_SW){
        temp = 3;
        done = 0xff;
    }

    if(!DECREASE_SW){
        temp = 4;
        done = 0xff;
    }
}//end of while
    DelayMs(150);    //debounce
    return temp;
}//
void userMenu(char pos){
	lcd_clear();
	lcd_goto_L1();

	switch(pos){
		case 0:
			lcd_puts("    HEIGHT    ");
			break;		
		case 1:
			lcd_puts("    RANGE     ");
			break;		
		case 2:
			lcd_puts(" SURFACE AREA ");
			break;		
	}

	lcd_goto_L2();
	lcd_puts("Press Up/Down"); //home screen message (line 2)
}
// New Menu System
void EnterHeight(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER HEIGHT ");
	lcd_goto_L2();
	lcd_puts("Press Up/Down"); //home screen message (line 2)
}

void EnterScreen(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" [cm] ");
}

void ShowDigits(unsigned char val){

    MyValLCD[0] = val /10;    //returns the quotient (if temp = 35 the result is 3)
    MyValLCD[1] = val % 10; 	//Returns remainder   (if temp = 35 the result is 5)

	MyValLCD[0] += 0x30;	//to ASCII
	MyValLCD[1] += 0x30;	//to ASCII

	EnterScreen();
	lcd_goto_L2();
	lcd_data(MyValLCD[0]);	//to LCD
	lcd_data(MyValLCD[1]);  //to LCD
}

  
void calc_distance(void)
{
	// from the transeiver datasheet the analog voltage is
	// the inverse of distance, so distance can be calculated
	// d = (1 / volts) then just scaled to suit the transeiver

	// load ADC value in 16bit math var
	math = ADRESH;
	math = (math * 256);
	math += ADRESL;

	// now invert it; (1 / volts) use (6050 / volts) for scaling
	math = (6050 / math);
	if(math >= 2) math -=2;		// fix linear error (-2)
	if(math > 99) math = 99;	// max limit at 99cm

	// convert from 0-99 to 2 decimal digits, 0-99cm
	cm10=0;
	while(math >= 10)
	{
		cm10++;
		math -= 10;
	}
	cm = math;
}
 //
unsigned char user_input(void)		//This will return what we want
{
	char done = 0;

	MyVal = 0;			//Start on 0
	while(done == 0){
   	  input_sw = WaitForInput();
		
      switch(input_sw){
		case 1:
			done = 0xff; 			//This tells us the user finished entering
			lcd_goto_L1();
			lcd_puts("     Done!      "); //home screen message (line 1)
			break;
      	case 3:
			if(MyVal < MyMaxVal)
      			MyVal++;
			EnterScreen();
			ShowDigits(MyVal);
			break;
      	case 4:
			if(MyVal > MyMinVal)
      			MyVal--;
			EnterScreen();
			ShowDigits(MyVal);
        	break;
		default: 
			break;
      }
	  
	}
	DelayS(1);
	return MyVal;
}

void home_screen(void){
	mnuPOS = 0;
	lcd_clear();
	lcd_goto_L1();
	lcd_puts("INFRARED LIQUID"); //home screen message (line 1)
	lcd_goto_L2();
	lcd_puts("LEVEL DETECTOR"); //home screen message (line 2)
  
	input_sw = 0;			//Reset the value

	while(input_sw != 1)  	//Wait until enter is pressed
		input_sw = WaitForInput();

	userMenu(0);
	DelayMs(2);				//shorter delay 
    height = user_input();	//The HEIGHT var will have the myVal

	userMenu(1);
	DelayMs(2);				//shorter delay 
    range = user_input();	//The HEIGHT var will have the myVal

	userMenu(2);
	DelayMs(2);				//shorter delay 
    area = user_input();	//The HEIGHT var will have the myVal
/*
"enter height"
call enter/settings (which is now user input function in new code)
height=MyVal

"enter range"
call user_input
range=MyVal

"enter surface area"
call user_input
area=MyVal
*/
}
  
//*********************************************************
/*  Junebug_Serial4.c    RomanBlack.com 19th July 2009.

    uses "zero error 1 second timer"
	system to generate a 2 second interval, then every
	2 seconds it reads an analog voltage from a
	Sharp GP2 distance sensor and converts it to decimal
	distance, then sends that data to a LCD

	Code for MikroC, config handled by MikroC compiler;
	_INTI02_OSC_1H
	_WDT_OFF_2H
	-MCLRE_ON_3H
	_LVP_OFF_4L
	_PWRT_ON_2L
*/
//*********************************************************

void main(void)
{  
    init();	// initialise I/O ports, LCD
    while(1){
 	//	home_screen();

 	// wait for 2 seconds, uses TMR1 free running at 1Mhz
   	while(!TMR1IF)  // wait for TMR1 overflow
	TMR1IF = 0; 	// clear overflow flag

	bres += 65536;			// add 65536uS to bres value
	if(bres >= 2000000)		// if reached 2 seconds!
	 {
    	bres -= 2000000;	// subtract 2 seconds, keep error
		  	
		// read the ADC voltage RA1 (Sharp GP2 sensor)
		GODONE=1;	// initiate conversion on the channel 0
		while(GODONE) continue;  // Wait convertion done
		calc_distance();		// convert ADC value to distance
		cm2LCD=cm+0x30;    //converting cm(from calc_distance procedure) to ascii 
		lcd_data(cm2LCD);

      				         
       }  
            
 
   } 
}

fantabulous68 · 16th September 2009, 03:00 PM

actually i tried something like this 1st:

Code:

tempvar=calc_distance();   // tempvar assigned cm value from calc_distance procedure 

cm2LCD=tempvar+0x30; 
 lcd_data(cm2LCD);

but i was messing up the var types

AtomSoft · 16th September 2009, 03:25 PM

You have to remember this. Can CM be higher than 09 ? if so then you should spilt the variable CM into 2 like

Code:

cmHigh = ( ( cm >> 4 ) & 0x0F ) + 0x30;
cmLow = ( cm & 0x0F ) + 0x30;

lcd_data(cmHigh);
lcd_data(cmLow);

This will give you 2 seperate ASCII values for the LCD.

fantabulous68 · 16th September 2009, 05:32 PM

the sensor has a range from 10cm to 80 cm So yes CM can be higher than 09.

I ran my code that i posted and the LCD displays random numbers when i power up.

EG. 12768126498124987491874
12094809128409283498239

But when i put a page in front the sensor and i hold it steadily then the sensor displays

EG. 888888888888888888888888
888888888888888888888888

and if i move it away and hold it steady it displays

4444444444444444444444444444
4444444444444444444444444444

if its not steady then the numbers are just random......im guessing im not formatting it correctly or something......

im going to try what you suggested now..........

its improving.................

when i power up its random numbers

now when i put a page & hold it steady....

EG.

010101010101010
010101010101010

i keep moving it away and...

020202020202020
020202020202020

030303030303030
030303030303030

till.....

090909090909090
090909090909090

THEN
000000000000000
000000000000000

and it repeats the sequence

010101010101010
010101010101010...............

and so on......

BTW

(it does not go to 111111111111111
111111111111111)

and 1212121212121212
1212121212121212 .....etc)

i just measured manually with a ruler to verify the values....its accurate

meaning....
the sensor has a min range of 10 cm......
so when the page is 10cm away it displays....

000000000000000
000000000000000

and if it 5cm away from the min range(ie. 15cm)

then it display:

050505050505050
050505050505050

and i measured this with a ruler and it gives 15cm

AtomSoft · 16th September 2009, 10:33 PM

ook just so i dont screw up the code.. can you post entire project again. So i can have a clear look.

AtomSoft · 16th September 2009, 10:34 PM

to me it sounds like its just looping with no stop heh which is a simple fix when i see the code.

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14th September 2009, 09:05 PM	#76
AtomSoft	what do you want it to do? It works fine for me. when i press up or down it says [cm] 01 __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics

14th September 2009, 09:17 PM	#78
fantabulous68	well its doing the above stuff without me pressing any buttons.... o gosh i just looked at mplab config bits again.....i had saved this in a new file and it reset the config bits to default..... im sure it will work after i set the bits correctly again.....thanx AtomSoft..... __________________ Learn without thinking begets ignorance. Think without learning is dangerous.

14th September 2009, 09:18 PM	#79
AtomSoft	heh no problem. I made the whole menu in the new code posted. I add the range and area stuff __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics

14th September 2009, 09:20 PM	#80
fantabulous68	lol complete thanx .... Yeah it sure is working smoothly...tried it out now.... i have to start paying forward my bank balance (im not working yet lol)...if i dont start paying back in kind hehe.... __________________ Learn without thinking begets ignorance. Think without learning is dangerous. Last edited by fantabulous68; 14th September 2009 at 09:26 PM.

14th September 2009, 09:29 PM	#81
AtomSoft	heh paying foward heh If you need any more help be sure to simply ask __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics

16th September 2009, 02:08 PM	#84
fantabulous68	O Ok...Cool. Hello AtomSoft...I wrote a test today & came home early...hehe I am attempting ADC 1st time today lol....well it looks easy to set up and stuff...hopefully it will work when i put it in the circuit (o else lol someone will be getting bothered ) __________________ Learn without thinking begets ignorance. Think without learning is dangerous.

16th September 2009, 03:00 PM	#86
fantabulous68	actually i tried something like this 1st: Code: tempvar=calc_distance(); // tempvar assigned cm value from calc_distance procedure cm2LCD=tempvar+0x30; lcd_data(cm2LCD); but i was messing up the var types __________________ Learn without thinking begets ignorance. Think without learning is dangerous. Last edited by fantabulous68; 16th September 2009 at 03:04 PM.

16th September 2009, 03:25 PM	#87
AtomSoft	You have to remember this. Can CM be higher than 09 ? if so then you should spilt the variable CM into 2 like Code: cmHigh = ( ( cm >> 4 ) & 0x0F ) + 0x30; cmLow = ( cm & 0x0F ) + 0x30; lcd_data(cmHigh); lcd_data(cmLow); This will give you 2 seperate ASCII values for the LCD. __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics Last edited by AtomSoft; 16th September 2009 at 03:26 PM.

16th September 2009, 05:32 PM	#88
fantabulous68	the sensor has a range from 10cm to 80 cm So yes CM can be higher than 09. I ran my code that i posted and the LCD displays random numbers when i power up. EG. 12768126498124987491874 12094809128409283498239 But when i put a page in front the sensor and i hold it steadily then the sensor displays EG. 888888888888888888888888 888888888888888888888888 and if i move it away and hold it steady it displays 4444444444444444444444444444 4444444444444444444444444444 if its not steady then the numbers are just random......im guessing im not formatting it correctly or something...... im going to try what you suggested now.......... its improving................. when i power up its random numbers now when i put a page & hold it steady.... EG. 010101010101010 010101010101010 i keep moving it away and... 020202020202020 020202020202020 030303030303030 030303030303030 till..... 090909090909090 090909090909090 THEN 000000000000000 000000000000000 and it repeats the sequence 010101010101010 010101010101010............... and so on...... BTW (it does not go to 111111111111111 111111111111111) and 1212121212121212 1212121212121212 .....etc) i just measured manually with a ruler to verify the values....its accurate meaning.... the sensor has a min range of 10 cm...... so when the page is 10cm away it displays.... 000000000000000 000000000000000 and if it 5cm away from the min range(ie. 15cm) then it display: 050505050505050 050505050505050 and i measured this with a ruler and it gives 15cm __________________ Learn without thinking begets ignorance. Think without learning is dangerous. Last edited by fantabulous68; 16th September 2009 at 06:39 PM.

16th September 2009, 10:33 PM	#89
AtomSoft	ook just so i dont screw up the code.. can you post entire project again. So i can have a clear look. __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics

16th September 2009, 10:34 PM	#90
AtomSoft	to me it sounds like its just looping with no stop heh which is a simple fix when i see the code. __________________ AtomSofts eBay Store AtomSoftTech: C18 TIPS & TRICKS v9 PDF Nokia 6100 Driver/Software My Name: Jason Lopez http://atomsofttech.info/ \| My YouTube Videos! My Favorite Store: dipmicro Electronics