LCD SC1602 DEMO for Arduino UNO

ArduinoLCD.ino

#define RS_PIN 2
#define DATA 1
#define CTL 0
#define RW_PIN 8
#define WR 0
#define RD 1
#define E_PIN 3
#define ON  1
#define OFF 0
#define DB4_PIN 4
#define DB5_PIN 5
#define DB6_PIN 6
#define DB7_PIN 7

void pin_ctl(int pin,int n){
   digitalWrite(pin,n);
}

void p_out(char c){
   pin_ctl(E_PIN,OFF);
   PORTD = (c & 0xf0) | (PORTD & 0x0f);
   delay(1);    
   pin_ctl(E_PIN,ON);
     delay(1);  
   pin_ctl(E_PIN,OFF);  
   PORTD = ((c << 4) & 0xf0) | (PORTD & 0x0f);
   delay(1);    
   pin_ctl(E_PIN,ON);
     delay(1);  
   pin_ctl(E_PIN,OFF); 
}

void lcd_ctl_out(char c){
   pin_ctl(RS_PIN,CTL);
   pin_ctl(E_PIN,OFF);
   PORTD = ((c << 4) & 0xf0) | (PORTD & 0x0f);
   pin_ctl(E_PIN,ON);
   delay(1);
   pin_ctl(E_PIN,OFF);  
}

void lcd_init(){
  lcd_ctl_out(0x3);
  delay(4);
  lcd_ctl_out(0x3);
  delay(1);
  lcd_ctl_out(0x3);
  delay(1);
  lcd_ctl_out(0x2);
  delay(1);  
  lcd_ctl_out(0x2);
  lcd_ctl_out(0x8);
  delay(1);
  lcd_ctl_out(0x0);
  lcd_ctl_out(0x8);
  delay(1);
  lcd_ctl_out(0x0);
  lcd_ctl_out(0x1);
  delay(1);
  lcd_ctl_out(0x0);
  lcd_ctl_out(0x6);
  delay(1);
  lcd_ctl_out(0x0);
  lcd_ctl_out(0xC);

  delay(5);
  
}

void lcd_char_Out(char c){
   pin_ctl(RS_PIN,DATA);
   p_out(c);   
}

void lcd_print(char *p){
  int i;
  for(i=0;i<16;i++){
    lcd_char_Out(*p);
    p++;
  }
}

void lcd_loc(unsigned char x,unsigned char y){
  unsigned char outc;
  outc = 0x80;
  if (y > 1){
    outc += 0x40; 
  }
  outc += x-1;
  pin_ctl(RS_PIN,CTL);
  p_out(outc);
  
}

void setup() {
  pinMode(13,OUTPUT);
  pinMode(RS_PIN,OUTPUT);
  pinMode(RW_PIN,OUTPUT);
  pinMode(E_PIN,OUTPUT);
  pinMode(DB4_PIN,OUTPUT);
  pinMode(DB5_PIN,OUTPUT);
  pinMode(DB6_PIN,OUTPUT);
  pinMode(DB7_PIN,OUTPUT);

  pin_ctl(RS_PIN,CTL);
  pin_ctl(RW_PIN,WR);
  pin_ctl(E_PIN,OFF);

  lcd_init();
  lcd_print("Hello!LCD SC1602");
  lcd_loc(1,2);
  lcd_print("ArduinoUNO DADA!");
  
}

void loop() {
}