[SOLVED] LCD with pic18F4523 is not working

[Saad_111]

Hi everyone,
I am working on pic18f4523 and i want to interface lcd with mcu, but lcd is not working.
here is a simple code:

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Code C - [expand]
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void main()
{
  CMCON = 0x07;            // turn off comparators
  ADCON1 = 0x0F;           // AD-Ports as digital I/O
  ADCON0= 0x0;             // AD-Converter module disabled
  TRISB = 0x00;
 
  lcd_config(&portd,4,5,6,3,2,1,0);
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Out(1,1,"Hello World");
 
  Delay_ms(1000);
  do
  {
    Delay_ms(100);
    PORTD=~PORTD;
  }
  while(1);
}

---

Can anyone please tell me, what is the problem actually?

 

[internetuser2k11]

Why are you inverting PORTD (PORTD = ~PORTD) which is connected to LCD.

If you have LEDs or Relays connected to some other port, then invert that port.

like PORTB = ~PORTB else remove the line (PORTD = ~PORTD)

 

[internetuser2k11]

Hi everyone,
I am working on pic18f4523 and i want to interface lcd with mcu, but lcd is not working.
here is a simple code:

void main()
{
CMCON = 0x07; // turn off comparators
ADCON1 = 0x0F; // AD-Ports as digital I/O
ADCON0= 0x0; // AD-Converter module disabled
TRISB = 0x00;

lcd_config(&portd,4,5,6,3,2,1,0);
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Out(1,1,"Hello World");

Delay_ms(1000);
do
{
Delay_ms(100);
PORTD=~PORTD;
}
while(1);
}

Can anyone please tell me, what is the problem actually?

remove the line

PORTD = ~PORTD

if you are using leds or relays on some other port like PORTB

then change the above line with

PORTB = ~PORTB