void init_port(void){
  volatile char* portf_dir = (volatile char*)0x30;
  volatile char* portk_dir = (volatile char*)0x107;
  *portf_dir = 0xFF;
  *portk_dir = 0x03;
}
void outdata(char out_data){
  volatile char* portf_data = (volatile char*)0x31;
  *portf_data = out_data;
}
void outcontrol(char out_data){
  volatile char* portk_data = (volatile char*)0x108;
  *portk_data = out_data;
}
void delay1(int a){
  volatile long j;
  for(int i=0;i<a;i++){
    for(j=0;j<2000;j++);
  }
}
void lcd_control_write(void){
  outcontrol(0x01);
  delay1(1);
  outcontrol(0x00);
  delay1(1);
}

void init_lcd(void){
  outdata(0x01);          //display on cursor blinking
  lcd_control_write();
  outdata(0x80);          //8 bit 2 line
  lcd_control_write();
  outdata(0x0c);          //8 bit 2 line
  lcd_control_write();
  // outdata(0x01);          //display on cursor blinking
  // lcd_control_write();
  //for(int a=0;a<100;a++){
  outdata(0x1c);          //clear display
  lcd_control_write();
  //}
  }
int i=0;
void init_lcd1(void){
  // outdata(0x01);          //display on cursor blinking
  // lcd_control_write();
  if(i==10){
    i=0;
  }
  outdata(0x01);          //display on cursor blinking
  lcd_control_write();
  outdata(0xc1);          //8 bit 2 line
  lcd_control_write();
  outdata(0x0c);          //8 bit 2 line
  lcd_control_write();
  outdata(0x18);          //display on cursor blinking
  lcd_control_write();
  i++;
  // for(int a=0;a<4;a++){
  //   outdata(0x05);          //clear display
  //   lcd_control_write();
  // }
}
void write_data(char wr_data){
  outdata(wr_data);
  outcontrol(0x02);
  delay1(1);
  outcontrol(0x03);
  delay1(1);
  outcontrol(0x02);
  delay1(1);
}
void write_string(char* ptr){
  int count1=ptr;
  while(*ptr != 0){
    write_data(*ptr);
    ptr++;
  }
}

void setup() {
  while(1){
  init_port();
  init_lcd1();
  write_string("Welcome to haryana");
  init_port();
  init_lcd();
  write_string("Ram Ram");
  }
  
}

void loop() {
  // put your main code here, to run repeatedly:
  // init_port();
  // init_lcd();
  // write_string("Welcome");
}

problem 7
void init_lcd(void){
  outdata(0x82);          //8 bit 2 line
  lcd_control_write();
  outdata(0x0f);          //8 bit 2 line
  lcd_control_write();
}
void init_lcd1(void){
  outdata(0x02);          //8 bit 2 line
  lcd_control_write();
  outdata(0xC3);          //8 bit 2 line
  lcd_control_write();
  outdata(0x0f);          //8 bit 2 line
  lcd_control_write();
}

problem 8
void write_string(char* ptr){
  int count1=ptr;
  while(*ptr != 0){
    ptr++;
  }
  ptr--;
  while(ptr != count1-1){
    write_data(*ptr);
    ptr--;
  }
}

problem 9
void init_lcd(void){
  outdata(0x7e);          //8 bit 2 line
  lcd_control_write();
  outdata(0x0c);          //8 bit 2 line
  lcd_control_write();
  outdata(0x07);          //display on cursor blinking
  lcd_control_write();
  for(int a=0;a<4;a++){
    outdata(0x1c);          //clear display
    lcd_control_write();
  }
}