Stop lcd from blinking the words written to it

[kite]

Hello guys , 

Can someone tell me how to stop the words blinking in my lcd to stop blinking this is the code i use.

#include<p18f4550.h>

#include<delays.h>

 

 

#pragma config FOSC = INTOSC_EC

 

#pragma WDT = OFF

#define EN LATDbits.LATD7

#define RS LATDbits.LATD6

 

 

void lcdcmd(unsigned char Data);

void lcdData(unsigned char l);

void lcdinit(void);

void waitlcd(int x);

void prints(const rom char * message);

void clearLcd(void);

 

void main(void)

{

 

OSCCON = 0b11110010;

 

TRISD=0;

TRISB=0;

EN=0;

lcdinit();

 

 

prints(‘HI’);

 

 

 

 

 

}

void lcdcmd(unsigned char Data)

{

RS=0; //because sending command

EN=0;

PORTB (Data >> 4) & 0x0F);

EN=1;

waitlcd(2);

EN=0;

PORTB  = (Data & 0x0F);

 

EN =1;

waitlcd(2);

EN=0;

 

 

}

void lcdData(unsigned char Data)

{

RS=1;  //because sending data

EN=0;

PORTB (Data >> 4) & 0x0F);

 

EN=1;

waitlcd(2);

EN=0;

PORTB  = (Data & 0x0F);

EN=1;

waitlcd(2);

EN=0;

 

 

 

}

 

void lcdinit(void)

{

RS=0;

EN=0;

PORTB= 0x3;

waitlcd(40);

EN=1;

EN=0;

waitlcd(5);

EN=1;

EN=0;

waitlcd(5);

EN=1;

EN=0;

waitlcd(2);

PORTB=0x2;

EN=1;

EN=0;

lcdcmd(0x28);   //set data length 4 bit 2 line

waitlcd(250); 

lcdcmd(0x0C); // enable display;   // set display on cursor on blink on

waitlcd(250);

lcdcmd(0x01); // clear lcd 

waitlcd(250); 

lcdcmd(0x06);  // cursor shift direction

waitlcd(250);

lcdcmd(0x80);  //set ram address

waitlcd(250);

 

 

}

 

void waitlcd(int x)

{

int i;

for (x ;x>1;x–)

{

for (i=0;i<=110;i++);

}

}

 

 

void prints( const rom char * message)  // Write message to LCD (C string type)

 

{

 

lcdcmd(0xE); // enable display;

 

 

 

while (*message){ // Look for end of string

lcdData(*message++);

}

 

 

 

}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[AJISH ALFRED]

Hi Kite,

The LCD is blinking because your controller resets continuously. To prevent the controller from reset you have to apply an infinite loop like

while ( 1 )

{

            ;

}

 

I hope modifying your main function like the following will solve the issue

 

void main(void)

{

 

OSCCON = 0b11110010;

 

TRISD=0;

TRISB=0;

EN=0;

lcdinit();

 

 

prints(‘HI’);

 

 

while ( 1 )

{

      ;

}

 

 

}

[kite]

Thanks Ajish

 

[AJISH ALFRED]

You are welcome Kite. If you have any further queries please don’t hesitate to share with us.

[Author]

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