Lcd Problem - Electronic Circuits Projects Diagrams Free

sachin.kolkar · 14th April 2008, 06:09 AM

hello friends,
i have problem with lcd display problem,
i m using mikroC software and 16x1 LCD,some times it displays the correct and some times it skips one bit while switch on and off the power supply......
here is my code

Code:

char*text="HELLO WORLD";
main(viod)
{
TRISB=0x00;
TRISC=0x00;
Lcd8_Init(&PORTC,&PORTB);
Lcd8_Cmd(LCD_CLEAR);
Lcd8_Cmd(LCD_SECOND_ROW);
Lcd8_Out(1,1,text);
}

PLZ help me guys..........

Pommie · 14th April 2008, 08:08 AM

Try adding a delay of 100ms after you write to the TRIS registers.

Mike.

sachin.kolkar · 16th April 2008, 05:18 AM

Quote:

Originally Posted by Pommie

Try adding a delay of 100ms after you write to the TRIS registers.

Mike.

hi Pommie ,
when i introduce the delay in the programme as u suggested ,
but same problem occuring....
here is my new code

Code:

char*text="HELLO";
char*texe1="world";
void main();
{TRISB=0x00;
Delay_ms(100);
TRISC=0x00;
Delay_ms(100);
Lcd8_Init(&PORTC,&PORTB);
Lcd8_cmd(LCD_TURN_ON);
Lcd8_cmd(LCD_RETURN_HOME);
Lcd8_cmd(LCD_SECOND_ROW);
Lcd8_cmd(LCD_CLEAR):
Delay_ms(100);
Lcd8_Out(1,1,text);
Delay_ms(100);
Lcd8_Out(2,1,text1);
Delay_ms(100);
Lcd8_cmd(LCD_CURSOR_OFF);
}

when i run this program ,some characters are missing in between a word.

LabRat · 16th April 2008, 02:56 PM

Wouldn't the library be based on a particular clock speed? Does your PIC match the expected speed?

(Just a guess without having reviewed the source of the library)

Also.. if you have a 16x1 display.. why are you calling LCD_SECOND_ROW ??

mister_e · 16th April 2008, 11:56 PM

16X1 display are actually 8X2... but on one line.

It's always handy to know the PIC#, the OSC speed AND the config fuses settings though

Pommie · 17th April 2008, 12:24 AM

Without having access to the compiler and knowing what the various library calls do, it is not easy to suggest a possible solution. The intermittent nature of the problem suggested timing, not so it seems. My only other suggestion is hardware, lack of decoupling capacitors, dry joints, intermittent connections etc.

Do MicroC have a forum where you can ask for help?

Mike.

sachin.kolkar · 17th April 2008, 04:18 AM

Quote:

Originally Posted by LabRat

Also.. if you have a 16x1 display.. why are you calling LCD_SECOND_ROW ??

if i don't call LCD_SECOND_ROW,
it displaying only first 8characters only....
also its starts displaying from 2nd character when i give Lcd8_Out(1,1,text) this instruction....

sachin.kolkar · 17th April 2008, 04:24 AM

Quote:

Originally Posted by Pommie

Without having access to the compiler and knowing what the various library calls do, it is not easy to suggest a possible solution. The intermittent nature of the problem suggested timing, not so it seems. My only other suggestion is hardware, lack of decoupling capacitors, dry joints, intermittent connections etc.

Do MicroC have a forum where you can ask for help?

Mike.

it displays but when i swicth on & switch off the power supply for some times in between this process once it displays the required character..

Norlin · 17th April 2008, 02:04 PM

what PIC are you using, what ferquency crystal, doing this on an EasyPIC board? Looking at their Lcd8 example, it seems you're doing it right:

Code:

char *text = "mikroElektronika";

void main() {
  TRISB = 0;                  // PORTB is output
  TRISC = 0;                  // PORTC is output
  Lcd8_Init(&PORTB, &PORTC);  // Initialize LCD at PORTB and PORTC
  Lcd8_Cmd(LCD_CURSOR_OFF);   // Turn off cursor
  Lcd8_Out(1, 1, text);       // Print text on LCD
}

14th April 2008, 06:09 AM	(permalink)
sachin.kolkar Experienced Member	Lcd Problem hello friends, i have problem with lcd display problem, i m using mikroC software and 16x1 LCD,some times it displays the correct and some times it skips one bit while switch on and off the power supply...... here is my code Code: char*text="HELLO WORLD"; main(viod) { TRISB=0x00; TRISC=0x00; Lcd8_Init(&PORTC,&PORTB); Lcd8_Cmd(LCD_CLEAR); Lcd8_Cmd(LCD_SECOND_ROW); Lcd8_Out(1,1,text); } PLZ help me guys.......... __________________

16th April 2008, 11:56 PM	(permalink)
mister_e Experienced Member	16X1 display are actually 8X2... but on one line. It's always handy to know the PIC#, the OSC speed AND the config fuses settings though __________________ Steve ______________________ info@mister-e.org www.mister-e.org

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14th April 2008, 08:08 AM	(permalink)
Pommie Experienced Member	Try adding a delay of 100ms after you write to the TRIS registers. Mike.

16th April 2008, 02:56 PM	(permalink)
LabRat Experienced Member	Wouldn't the library be based on a particular clock speed? Does your PIC match the expected speed? (Just a guess without having reviewed the source of the library) Also.. if you have a 16x1 display.. why are you calling LCD_SECOND_ROW ??

17th April 2008, 12:24 AM	(permalink)
Pommie Experienced Member	Without having access to the compiler and knowing what the various library calls do, it is not easy to suggest a possible solution. The intermittent nature of the problem suggested timing, not so it seems. My only other suggestion is hardware, lack of decoupling capacitors, dry joints, intermittent connections etc. Do MicroC have a forum where you can ask for help? Mike.