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

fantabulous68 · 9th September 2009, 10:20 AM

I recently got a pikit 2, its the 1st time that im using push button switches.
im using 4 pushbuttons. when i power the circuit The LCD displays "infrared liquid level detector" permanently, so the lcd code and initialising is working.

All i want for now is:

when i press ENTER/Settings button....i want "enter/settings" to display on the LCD. And that is not happening when i press the button. Please help me solve this problem....i attached a picture of how i connect the switch to the pic.

Code:

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


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

void init(void)
{   

    OSCCON|=0x60; //set fosc to 4Mhz
	TRISB=0x00; 
	TRISC=0xFC;
        TRISA = 0b10000010; 	// RA7 high imp, RA3 is serial out,
	ANSEL=0x02;            //set RA1 as analog input for GP2 sensor
	ANSELH=0x00;
	lcd_init(); //call LCD initialisation
}

 void read_input_sw(void)
{
 char input_sw2; 
 input_sw = ((HOME_SW*8)+(INCREASE_SW*4)+(DECREASE_SW*2)+(ENTERSETTINGS_SW*1)); //create a binary combination of the input switches
 if (input_sw != 0) //check if any of the switches are pressed
	{
	 DelayMs(20); //switch debouncing
	 input_sw2 = ((HOME_SW*8)+(INCREASE_SW*4)+(DECREASE_SW*2)+(ENTERSETTINGS_SW*1));
	 while (input_sw2 != 0) //if a switch is pressed wait for release
			{
			 input_sw2 = ((HOME_SW*8)+(INCREASE_SW*4)+(DECREASE_SW*2)+(ENTERSETTINGS_SW*1));
			 DelayMs(20); //switch debouncing
  			}
	 }
}
 
   
void home_screen(void)
{
	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)

	read_input_sw();
	while(input_sw == 0)

		read_input_sw();
		switch(input_sw)
	{
		case 8: break;	
		//	ENTER/SETTINGS	button pressed	
		case 1: {	lcd_clear();
		            lcd_goto_L1();
		            lcd_puts(" ENTER/SETTINGS ");
		            DelayS(1);
		            lcd_clear();
 					
					break;
				}
                   default : break; //should any abnormalties occur
    } 
	return;
}


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

AtomSoft · 9th September 2009, 10:57 AM

If thats how the buttons are wired then you have to check for a LOW signal.

like ..

Code:

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(20);    //debounce
    return temp;
}

and do this for calling in your main code:

Code:

if(WaitForInput = 1){
    //This is where you put code if the user pressed ENTER
}

if(WaitForInput = 2){
    //This is where you put code if the user pressed Home
}

if(WaitForInput = 3){
    //This is where you put code if the user pressed Increase
}

if(WaitForInput = 4){
    //This is where you put code if the user pressed Decrease
}

or

Code:

switch(WaitForInput){
    case 1:
        //User Pressed ENTER do something
        break;
    case 2:
        //User Pressed HOME do something
        break;
    case 3:
        //User Pressed INCREASE do something
        break;
    case 4:
        //User Pressed DECREASE do something
        break;
}

fantabulous68 · 9th September 2009, 11:10 AM

Thanks ALOT AtomSoft...Im going to try that out now....

AtomSoft · 9th September 2009, 11:17 AM

heh no problem.

This would be the same but smoother:

Code:

char WaitForInput(void){
  char temp;

  while(1){
    if(!ENTERSETTINGS_SW){
        temp = 1;
        break;
    }

    if(!HOME_SW){
        temp = 2;
        break;
    }

    if(!INCREASE_SW){
        temp = 3;
        break;
    }

    if(!DECREASE_SW){
        temp = 4;
        break;
    }
  }//end of while
    DelayMs(20);    //debounce
    return temp;
}

fantabulous68 · 9th September 2009, 11:28 AM

Uhmm its giving an error

illegal type for switch expression
illegal conversion of integer to pointer

Code:

switch(WaitForInput){
    case 1:
        //User Pressed ENTER do something
        break;
    case 2:
        //User Pressed HOME do something
        break;
    case 3:
        //User Pressed INCREASE do something
        break;
    case 4:
        //User Pressed DECREASE do something
        break;
}

AtomSoft · 9th September 2009, 11:32 AM

oops try this:

Code:

switch(WaitForInput()){
    case 1:
        //User Pressed ENTER do something
        break;
    case 2:
        //User Pressed HOME do something
        break;
    case 3:
        //User Pressed INCREASE do something
        break;
    case 4:
        //User Pressed DECREASE do something
        break;
}

if that fails then simply:

Code:

input_sw = WaitForInput();

switch(input_sw){
    case 1:
        //User Pressed ENTER do something
        break;
    case 2:
        //User Pressed HOME do something
        break;
    case 3:
        //User Pressed INCREASE do something
        break;
    case 4:
        //User Pressed DECREASE do something
        break;
}

fantabulous68 · 9th September 2009, 11:49 AM

hehe, the 1st 1 worked, now for the lol testing it on the circuit

AtomSoft · 9th September 2009, 11:59 AM

heh good luck. I leave in about 1 hours for errands then come home then wait about 1 hours till i have to goto work. so enjoy and have fun. and if you need help ill try to post .

fantabulous68 · 9th September 2009, 12:04 PM

yay lol getting somewhere

. i tested it now.

when i power up without pressing switches it displays:

infrared liquid level detector
clears then
enter/settings
clears then
infrared liquid level detector
clears then
enter/settings

and keeps doing this.......

when i press the home button down continuously :
it displays
"infrared liquid level detector" continuously

thats correct because the home button takes you to the home screen

when i release the home button then:

infrared liquid level detector
clears then
enter/settings
clears then
infrared liquid level detector
clears then
enter/settings

and keeps doing this.......

uhmm im going to play around to see if i can get it to stay at enter/settings screen

fantabulous68 · 9th September 2009, 12:05 PM

Thanks again n again n again

. Im very happy now....that im seeing some progress.
Going to continue to make all the buttons work now. ill b back

for sure

AtomSoft · 9th September 2009, 01:02 PM

heh was bored and about to leave but i have a gift

Code:

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

char input_sw;
char mnuPOS;

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

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

void init(void);
char WaitForInput(void);
void home_screen(void);
void EnterScreen(void);
void ShowDigits(unsigned char val);
void main(void);

void init(void)
{   

    OSCCON|=0x60; //set fosc to 4Mhz
	TRISB=0x00; 
	TRISC=0xFC;
        TRISA = 0b10000010; 	// RA7 high imp, RA3 is serial out,
	ANSEL=0x02;            //set RA1 as analog input for GP2 sensor
	ANSELH=0x00;
	lcd_init(); //call LCD initialisation
}

char WaitForInput(void){
  char temp;

  while(1){
    if(!ENTERSETTINGS_SW){
        temp = 1;
        break;
    }

    if(!HOME_SW){
        temp = 2;
        break;
    }

    if(!INCREASE_SW){
        temp = 3;
        break;
    }

    if(!DECREASE_SW){
        temp = 4;
        break;
    }
  }//end of while
    DelayMs(20);    //debounce
    return temp;
}
   
void home_screen(void){
	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)
}

void EnterScreen(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	DelayS(1);
	lcd_clear();
}

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

	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	lcd_goto_L2();
	lcd_data(MyValLCD[0]);	//to LCD
	lcd_data(MyValLCD[1]);  //to LCD
}

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

	MyVal = 0;
	MyMinVal = 0;
	MyMaxVal = 99;

while(1){
   	input_sw = WaitForInput();

    switch(input_sw){
      case 1:
      	EnterScreen();
		mnuPOS = 1;
        break;
      case 2:
		home_screen();
		mnuPOS = 2;
        break;
    }
	
	while(mnuPOS == 1){
   		input_sw = WaitForInput();
		
      switch(input_sw){
		case 1:
			mnuPOS = 2;
			home_screen();
			break;
      	case 3:
			if(MyVal < MyMaxVal)
      			MyVal++;
			ShowDigits(MyVal);
			break;
      	case 4:
			if(MyVal > MyMinVal)
      			MyVal--;
			ShowDigits(MyVal);
        	break;
      }
	}
	
	//Do something here with the new Value which is a decimal in MyVal.
}

	 
}

fantabulous68 · 9th September 2009, 07:24 PM

Hehe, that was a nice surprise

when i logged in again. Thanks lol i hope you not counting how many times i said that

I tried the code. i commented home screen() in the main code otherwise it only displays infra red liquid level detector and ignores the button presses.

Code:

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

ALSO
it works when i replace:

Code:

char WaitForInput(void){
  char temp;

  while(1){
    if(!ENTERSETTINGS_SW){
        temp = 1;
        break;
    }

    if(!HOME_SW){
        temp = 2;
        break;
    }

    if(!INCREASE_SW){
        temp = 3;
        break;
    }

    if(!DECREASE_SW){
        temp = 4;
        break;
    }
  }//end of while
    DelayMs(20);    //debounce
    return temp;
}

with:

Code:

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(20);    //debounce
    return temp;
}

if i dont replace it then pressing the buttons has no affect...it keeps displaying "enter/settings"

when i replace it and power on:

"enter/settings" is displayed continuously

when i press home button: infra red liquid level detect is displayed.
it does not display the full word "detector"

when i release home button: "enter/settings" is displayed continuously

when i press increase button: the screen remains blank
when i release increase button:"enter/settings" is displayed continuously
uhmmm it does not show the number of times the button is pressed on the LCD

when i press decrease button: the screen remains blank
when i release decrease button:"enter/settings" is displayed continuously
it does not show the number of times the button is pressed on the LCD

when i press home/settings button:"enter/settings" is displayed continuously
when i release home/settings button:"enter/settings" is displayed continuously

fantabulous68 · 9th September 2009, 07:31 PM

im thinking maybe this:

Code:

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

is affecting the "detect" word from being "detector".

i was bread boarding a switch mode power supply-boost regulator
3.2V to 5V, im waiting for the batteries to charge so i can test it...hehe.

AtomSoft · 9th September 2009, 08:07 PM

that should not affect the other text.
Can you post full code?
Try this:

Code:

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

char input_sw;
char mnuPOS;

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

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

void init(void);
char WaitForInput(void);
void home_screen(void);
void EnterScreen(void);
void ShowDigits(unsigned char val);
void main(void);

void init(void)
{   

    OSCCON|=0x60; //set fosc to 4Mhz
	TRISB=0x00; 
	TRISC=0xFC;
        TRISA = 0b10000010; 	// RA7 high imp, RA3 is serial out,
	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 home_screen(void){
	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)
}

void EnterScreen(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	DelayS(1);
	lcd_clear();
}

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

	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	lcd_goto_L2();
	lcd_data(MyValLCD[0]);	//to LCD
	lcd_data(MyValLCD[1]);  //to LCD
}

void main(void)
{
	init();			// initialise I/O ports, LCD
    DelayMs(20);    // init delay
	home_screen();	//display home screen

	MyVal = 0;
	MyMinVal = 0;
	MyMaxVal = 99;

	mnuPOS = 2;
while(1){
   	input_sw = WaitForInput();

    switch(input_sw){
      case 1:
      	EnterScreen();
		mnuPOS = 1;
        break;
      case 2:
		home_screen();
		mnuPOS = 2;
        break;
    }
	
	while(mnuPOS == 1){
   		input_sw = WaitForInput();
    	DelayMs(50);    //debounce #2 for a total of 200ms (user can press button 5 times in 1 second)
		
      switch(input_sw){
		case 1:
			mnuPOS = 2;
			home_screen();
			break;
      	case 3:
			if(MyVal < MyMaxVal)
      			MyVal++;
			ShowDigits(MyVal);
			break;
      	case 4:
			if(MyVal > MyMinVal)
      			MyVal--;
			ShowDigits(MyVal);
        	break;
      }
	}
	
	//Do something here with the new Value which is a decimal in MyVal.
}

	 
}

fantabulous68 · 9th September 2009, 08:13 PM

Code:

#include <pic.h>
#include "pic.h"
#include "delay.h"
#include "math.h" 
#include <stdio.h>
#include <stdlib.h>
  
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);
void home_screen(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];
int height=50, SensorPos=10;
char input_sw;

 
char mnuPOS;

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



#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(20); //wait for LCD to be ready
	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(20); //wait for LCD to be ready
	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(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)
{   

    OSCCON|=0x60; //set fosc to 4Mhz
	TRISB=0x00; 
	TRISC=0xFC;
    TRISA = 0b10000010; 	// RA7 high imp, RA3 is serial out,
	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(20);    //debounce
    return temp;
}

void home_screen(void){
	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)
}

void EnterScreen(void){
	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	DelayS(1);
	lcd_clear();
}

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

	lcd_clear();
	lcd_goto_L1();
	lcd_puts(" ENTER/SETTINGS ");
	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;
}
 
void main(void)
{
	init();	// initialise I/O ports, LCD
    //home_screen();

	MyVal = 0;
	MyMinVal = 0;
	MyMaxVal = 99;

while(1){
   	input_sw = WaitForInput();

    switch(input_sw){
      case 1:
      	EnterScreen();
		mnuPOS = 1;
        break;
      case 2:
		home_screen();
		mnuPOS = 2;
        break;
    }
	
	while(mnuPOS == 1){
   		input_sw = WaitForInput();
		
      switch(input_sw){
		case 1:
			mnuPOS = 2;
			home_screen();
			break;
      	case 3:
			if(MyVal < MyMaxVal)
      			MyVal++;
			ShowDigits(MyVal);
			break;
      	case 4:
			if(MyVal > MyMinVal)
      			MyVal--;
			ShowDigits(MyVal);
        	break;
      }
	}
	
	//Do something here with the new Value which is a decimal in MyVal.
}
 
	 
}

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
Substituting a 16x2 LCD display for 16x1 LCD display?	Dawny	Electronic Projects Design/Ideas/Reviews	19	11th October 2008 09:58 AM
Pushbutton Slow & Repeating Pulse	btanner	Electronic Projects Design/Ideas/Reviews	1	22nd January 2008 06:18 PM
Is this display burned out? (Sony MD LCD Display)	Amphr_Moth	General Electronics Chat	4	28th October 2007 07:47 PM
how to display '-' & '+' range number on LCD?	meera83	Micro Controllers	8	5th July 2007 09:56 AM
lcd display with hd44780 display driver	ANUPAMA	Micro Controllers	2	7th April 2004 02:58 PM

9th September 2009, 11:10 AM	#3
fantabulous68	Thanks ALOT AtomSoft...Im going to try that out now....

9th September 2009, 11:17 AM	#4
AtomSoft	heh no problem. This would be the same but smoother: Code: char WaitForInput(void){ char temp; while(1){ if(!ENTERSETTINGS_SW){ temp = 1; break; } if(!HOME_SW){ temp = 2; break; } if(!INCREASE_SW){ temp = 3; break; } if(!DECREASE_SW){ temp = 4; break; } }//end of while DelayMs(20); //debounce return temp; } __________________ 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; 9th September 2009 at 11:31 AM.

9th September 2009, 11:49 AM	#7
fantabulous68	hehe, the 1st 1 worked, now for the lol testing it on the circuit

9th September 2009, 11:59 AM	#8
AtomSoft	heh good luck. I leave in about 1 hours for errands then come home then wait about 1 hours till i have to goto work. so enjoy and have fun. and if you need help ill try to post . __________________ 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

9th September 2009, 12:04 PM	#9
fantabulous68	yay lol getting somewhere. i tested it now. when i power up without pressing switches it displays: infrared liquid level detector clears then enter/settings clears then infrared liquid level detector clears then enter/settings and keeps doing this....... when i press the home button down continuously : it displays "infrared liquid level detector" continuously thats correct because the home button takes you to the home screen when i release the home button then: infrared liquid level detector clears then enter/settings clears then infrared liquid level detector clears then enter/settings and keeps doing this....... uhmm im going to play around to see if i can get it to stay at enter/settings screen

9th September 2009, 12:05 PM	#10
fantabulous68	Thanks again n again n again. Im very happy now....that im seeing some progress. Going to continue to make all the buttons work now. ill b backfor sure Last edited by fantabulous68; 9th September 2009 at 12:31 PM.

9th September 2009, 07:24 PM	#12
fantabulous68	Hehe, that was a nice surprise when i logged in again. Thanks lol i hope you not counting how many times i said that I tried the code. i commented home screen() in the main code otherwise it only displays infra red liquid level detector and ignores the button presses. Code: void main(void) { init(); // initialise I/O ports, LCD //home_screen(); ALSO it works when i replace: Code: char WaitForInput(void){ char temp; while(1){ if(!ENTERSETTINGS_SW){ temp = 1; break; } if(!HOME_SW){ temp = 2; break; } if(!INCREASE_SW){ temp = 3; break; } if(!DECREASE_SW){ temp = 4; break; } }//end of while DelayMs(20); //debounce return temp; } with: Code: 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(20); //debounce return temp; } if i dont replace it then pressing the buttons has no affect...it keeps displaying "enter/settings" when i replace it and power on: "enter/settings" is displayed continuously when i press home button: infra red liquid level detect is displayed. it does not display the full word "detector" when i release home button: "enter/settings" is displayed continuously when i press increase button: the screen remains blank when i release increase button:"enter/settings" is displayed continuously uhmmm it does not show the number of times the button is pressed on the LCD when i press decrease button: the screen remains blank when i release decrease button:"enter/settings" is displayed continuously it does not show the number of times the button is pressed on the LCD when i press home/settings button:"enter/settings" is displayed continuously when i release home/settings button:"enter/settings" is displayed continuously Last edited by fantabulous68; 9th September 2009 at 07:51 PM.

9th September 2009, 07:31 PM	#13
fantabulous68	im thinking maybe this: Code: lcd_data(MyValLCD[0]); //to LCD lcd_data(MyValLCD[1]); //to LCD is affecting the "detect" word from being "detector". i was bread boarding a switch mode power supply-boost regulator 3.2V to 5V, im waiting for the batteries to charge so i can test it...hehe.