[SOLVED] LCD Problem with PIC16F877A

[Mithun_K_Das]

Can anyone tell me why this program don't work properly for LCD?

// LCD module connections
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
// End LCD module connections


void main()
{

  TRISC = 0x00; // all out
  PORTC = 0x00; // all 0
  TRISD = 0xFF; // all in
  TRISA5_bit = 0; // out
  // LCD initialization...........
  Lcd_Init();                        // Initialize LCD
  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);
  Lcd_Out(1,1,"Its A test Program");
  
  Delay_ms(1000);
  Lcd_Cmd(_LCD_CLEAR);
  ADCON1 = 0b00001110;
  ADCON0=0b00000001;

 while(1)
 {
   Lcd_Out(2,1,"Just for Test");
   RA5_bit = ~RA5_bit;
   Delay_ms(500);

 }// while
} // void

According to the program, it should show first sentence first then the second one on the LCD screen. Yes it shows in simulation. But in real circuit, it just show the first sentence on the LCD. not the sentence inside while(1) loop. But the RA5 pin works as it should.

Can anyone tell me why?

 

[Mithun_K_Das]

Problem was in hardware. The wires I connected LCD with PCB was loose connected. Thats why data didn't pass clearly.

Solved