LCD interfacing with PIC16F877A based developement board

[ccslearner]

Hello edaboard members,
I just try to interface my LCD 2*16 line with PIC16F877A developement board .i connect all the wires correctly but i am trouble in giving power supply to lcd . where i can get from power supply through MCU or breadboard so please guide me i attached my developement board schematic and PIC C compiler

///////////////////////////////////////////////////////////////////////////
////                             LCD.C                                 ////
////                 Driver for common LCD modules                     ////
////                                                                   ////
////  lcd_init()   Must be called before any other function.           ////
////                                                                   ////
////  lcd_putc(c)  Will display c on the next position of the LCD.     ////
////                     The following have special meaning:           ////
////                      \f  Clear display                            ////
////                      \n  Go to start of second line               ////
////                      \b  Move back one position                   ////
////                                                                   ////
////  lcd_gotoxy(x,y) Set write position on LCD (upper left is 1,1)    ////
////                                                                   ////
////                                                                   ////
///////////////////////////////////////////////////////////////////////////
#define RS PIN_C0
#define RD_WRT PIN_C1
#define ENABLE PIN_C2
#BYTE PORTC=0x7   // C4,C5,C6,C7

#define LCD_ROW_1 1
#define LCD_ROW_2 2

#define LCD_LINE_TWO 0x40    // LCD RAM address for the second line
BYTE const LCD_INIT_STRING[4] = {0x28, 0xc, 1, 6};                        //const = Data is read-only.  Depending on compiler configuration,
                                                                          // this qualifier may just make the data read-only -AND/OR- it may place the data
                                                                          // into program memory to save space. (see #DEVICE const=)                
                            // These bytes need to be sent to the LCD
                            // to start it up.
extern unsigned char dispbuf[16];

const unsigned char welcome_mess_1[17] = {" Hi Prabhu      "};
const unsigned char welcome_mess_2[17] = {"Welcome toindia "};
void lcddisplay(int8);

void lcd_send_nibble( BYTE n ) 
{
  PORTC =  (PORTC & 0x0f) | (n<<4);
  delay_cycles(1);
  output_high(enable);
  delay_us(2);
  output_low(enable);
  delay_ms(2);
}

void lcd_send_byte( BYTE address, BYTE n ) 
{
  output_low(rs);
  delay_cycles(3);//added
  delay_us(1);//added
  
  if ( address & 0x01)
    output_high(rs);
  else
    output_low(rs);
        
  delay_cycles(1);
  delay_cycles(1);
  output_low(enable);
  lcd_send_nibble(n >> 4);
  lcd_send_nibble(n & 0xf);
}

void lcd_init(void) 
{
  int8 i=0;
  set_tris_c(0x00);
  delay_ms(15);
  
  output_low(RD_WRT);
  output_low(rs);
  output_low(enable);
  
  lcd_send_nibble(3); // send 8 bit long

  delay_ms(5);

  lcd_send_nibble(3); // send 8 bit long

  delay_ms(1);

  lcd_send_nibble(3); // send 8 bit long

  delay_ms(1);

  lcd_send_nibble(2);

  for(i=0;i<=3;++i)
  lcd_send_byte(0,LCD_INIT_STRING[i]);
}


void lcd_gotoxy( BYTE x, BYTE y) 
{
  BYTE address;
  if(y!=1)
    address=LCD_LINE_TWO;
  else
    address=0;
  address+=x-1;
  lcd_send_byte(0,0x80|address);
}

void lcd_putc( char c)
{
  switch (c) 
  {
    case '\f'   : lcd_send_byte(0,1);
                  delay_ms(2);
                  break;
    case '\n'   : lcd_gotoxy(1,2);  
                   break;
    case '\b'   : lcd_send_byte(0,0x10); 
                   break;
    default     : lcd_send_byte(1,c);   
                   break;
  }
}

////////////////////  ADDED ///////////////////
// This is the welcome message shown to LCD display
// when the power is coming up
void shwmess(void)   
{
  BYTE i;
  
  for(i=0;i<=15;i++)
  dispbuf[i]=welcome_mess_1[i];
  
  lcddisplay(LCD_ROW_1); 
      
  for(i=0;i<=15;i++)
  dispbuf[i]=welcome_mess_2[i];
  
  lcddisplay(LCD_ROW_2); 
}

// write the dispbuf data to LCD display 
// based on the row number passed to function
void lcddisplay(int8 row_no)
{
   BYTE i=0;
   
   if(row_no == LCD_ROW_1)
     lcd_gotoxy(1,1);
   else
     lcd_gotoxy(1,2);
   
   for(i=0;i<=15;i++)
   lcd_putc(dispbuf[i]);
}

 

[Golden Electronics]

u can apply separate supply connection to LCD as well as controller but their ground must be common.

 

[ccslearner]

u can apply separate supply connection to LCD as well as controller but their ground must be common.

thanks for breadboard, wiring is it corrct?????
PIC16F877A --> 11th pin(5v) is connected to positive rail of the breadboard
one more wire is connected between positive rail of the breadboard to Positive terminal Point A
12th pin(GND) is conected to negative rail of the breadboard and this negative rail connected to another ground of the bread board
through another wire
LCD----------->PIN1(GND) Is connected to common negative rail of the breadboard
PIn2(5v) is connced to breadboard positive point A

please verify it because am afraid to give power supply to my development board