void setup() {
  // put your setup code here, to run once:
 volatile unsigned char *outFdrr = 0x30, *outKdrr = 0x107;
  *outFdrr = 0xFF;
  *outKdrr= 0xFF;

init_lcd();

//spinToLeft("Welcome","ECEN academy");
spinToRight("Welcome","ECEN academy");
}

void largeDelay(){
    volatile long int i=0;
  for(i=0;i<50000;i++);
}
void del(){
  volatile int i=0;
  for(i=0;i<100;i++);
}

void lcd_cntrl_write(){
  volatile unsigned char *rw = 0x108;
  *rw=0x00;
  del();
  *rw=0x01;
  del();
  *rw=0x00;
  del();
}

void outcntrl(char out){
    volatile unsigned char *rw = 0x108;
  *rw=out;
}

void op_data(unsigned char val){
  volatile unsigned char *outFd = 0x31;
  *outFd = val;
}

void init_lcd() {
  volatile unsigned char *outFd = 0x31;

  op_data(0x38);//set function
  lcd_cntrl_write();
  op_data(0x0f);//display contro;
  lcd_cntrl_write();
  op_data(0x01);//clear
  lcd_cntrl_write();
    op_data(0x06);//entry mode
  lcd_cntrl_write();
}

void out_write(char a){
  op_data(a);
  outcntrl(0x02);
  del();
  outcntrl(0x03);
  del();
  outcntrl(0x02);
  del();
}

void setCursor(int len,boolean l1){
unsigned char base = l1?0x80:(0x80|0x40);
unsigned char addr= base+(unsigned char)(len);
op_data(addr);
lcd_cntrl_write();
}

int stringSize(char a[]){
  int i=0;
  for(i=0;a[i];i++);
  return i;
}

void wrtString(char a[]){
    for(int i=0;a[i];i++){
    out_write(a[i]);
  }
}

void wrtMiddle(char a[],boolean l1){
  setCursor((16-stringSize(a))/2,true);
  wrtString(a);
}

void clearLine(boolean l1){
  setCursor(0,l1);
  for(int i=0;i<=15;i++){
    out_write("\0");
  }
  setCursor(0,l1);
}

void spinToLeft(char a1[],char a2[]){
  volatile boolean x= true;
  wrtMiddle(a1,true);
 while(x){
 for(int i=15;i>=0;i--){
  setCursor(i,false);
  wrtString(a2);
  largeDelay();
  clearLine(false);
 }
 }
}

void spinToRight(char a1[],char a2[]){
  volatile boolean x= true;
  wrtMiddle(a1,true);
 while(x){
 for(int i=0;i<=15;i++){
  setCursor(i,false);
  wrtString(a2);
  largeDelay();
  clearLine(false);
 }
 }
}
void loop() {
  // put your main code here, to run repeatedly
}