Interfacing Lcd with pic16f877A

[Clone_X]

hey guys im using hitec c in ma projects...and i wanna know how to change the lcd.c file that comes with hitec c samples to use with following pin configuration...

RD4-LCD_DATA BIT 4

RD5-LCD_DATA BIT 5

RD6-LCD_DATA BIT 6

RD7-LCD_DATA BIT 7

 

[btbass]

Try changing these two lines

/* write a byte to the LCD in 4 bit mode */

void lcd_write(unsigned char c)
  {
  __delay_us(40);
  LCD_DATA = ( ( c >> 4 ) & 0x0F );	//LCD_DATA = ( c & 0xF0 ); ?????? CHANGE
  LCD_STROBE();
  LCD_DATA = ( c & 0x0F );		//LCD_DATA = ( ( c << 4 ) & 0xF0  ); ?????? CHANGE    
  LCD_STROBE();
  }

And change these

/* initialise the LCD - put into 4 bit mode */

void lcd_init()
  {
  char init_value;
  
  ADCON1 = 0x06;	// Disable analog pins on PORTA

  init_value = 0x3;	//init_value = 0x30; ?????? CHANGE
  TRISA=0;
  TRISD=0;
  LCD_RS = 0;
  LCD_EN = 0;
  LCD_RW = 0;
	
  __delay_ms(15);	// wait 15mSec after power applied,
  LCD_DATA	 = init_value;
  LCD_STROBE();
  __delay_ms(5);
  LCD_STROBE();
  __delay_us(200);
  LCD_STROBE();
  __delay_us(200);
  LCD_DATA = 2;	// Four bit mode		//LCD_DATA = 0x20; ?????? CHANGE
  LCD_STROBE();

  lcd_write(0x28); // Set interface length
  lcd_write(0xF); // Display On, Cursor On, Cursor Blink
  lcd_clear();	// Clear screen
  lcd_write(0x6); // Set entry Mode
  }