here’s working example of

[romel emperado]

here’s working example of code I am using..

 

 

// 4 bit example

#include<reg51.h>

#define LCD P1
#define LCD_EN        0x80
#define LCD_RS        0x20
                    
//LCD Commands       

#define LCD_SETMODE       0x04
#define LCD_SETVISIBLE       0x08
#define LCD_SETFUNCTION       0x28
#define LCD_SETDDADDR       0x80

void delayms(unsigned char);
void delayus(unsigned char);
void lcd_init();
void lcd_reset();
void lcd_cmd (char);
void lcd_data(unsigned char);
void lcd_str (unsigned char*);

void  main (void)
{
lcd_init();
lcd_cmd(0x80);            // ist line address
lcd_str(”     i love  “);
lcd_cmd(0xC0);              // 2nd line address
lcd_str(“romel”);
while(1);
}

void delayus(unsigned char delay){
    while(delay–);
}

void delayms(unsigned char delay){
    while(delay–)
        delayus(149);
}

void lcd_reset()
{
    LCD = 0xFF;
    delayms(40);
    LCD = 0x03+LCD_EN;
    LCD = 0x03;
    delayms(40);
    LCD = 0x03+LCD_EN;
    LCD = 0x03;
    delayms(5);
    LCD = 0x03+LCD_EN;
    LCD = 0x03;
    delayms(5);
    LCD = 0x02+LCD_EN;
    LCD = 0x02;
    delayms(5);
}

void lcd_init ()
{
    lcd_reset();
    lcd_cmd(LCD_SETFUNCTION);                    // 4-bit mode – 1 line – 5×7 font.
    lcd_cmd(LCD_SETVISIBLE+0x04);                // Display no cursor – no blink.
    lcd_cmd(LCD_SETMODE+0x02);                   // Automatic Increment – No Display shift.
    lcd_cmd(LCD_SETDDADDR);                      // Address DDRAM with 0 offset 80h.
 }

 void lcd_cmd (char cmd)
{
    LCD = ((cmd >> 4) & 0x0F)|LCD_EN;
    LCD = ((cmd >> 4) & 0x0F);

    LCD = (cmd & 0x0F)|LCD_EN;
    LCD = (cmd & 0x0F);

    delayus(250);
    delayus(250);
}

void lcd_data (unsigned char dat)
{
    LCD = (((dat >> 4) & 0x0F)|LCD_EN|LCD_RS);
    LCD = (((dat >> 4) & 0x0F)|LCD_RS);
   
    LCD = ((dat & 0x0F)|LCD_EN|LCD_RS);
    LCD = ((dat & 0x0F)|LCD_RS);

    delayus(250);
    delayus(250);
}

void lcd_str (unsigned char *str)
{
    while(*str){
        lcd_data(*str++);
    }
}