#include"LCD.h"
void setup() {
  volatile char str1[]="Welcome to",size1=12,str2[]="ECEN academy",size2=12; // word and size
  volatile char mode=0;
  init_port();
  lcd_Display_Mode(mode); // 8 bit mode =0 or 4 bit mode =1
  Display_ON_Cursor_off(); //  display on cursor off
  display_clear(); //clear lcd data
  AutoDecrement(); //auto increment
   /*
   Displaying “Welcome to" on line1. Rotate line1 left to right
 Continuously and “ECEN Academy” on line2 in Middle.
   */
   while(1)
   {
  DLP_revolve_LR(str1,size1,str2,size2);// str = first address,size= String length
}
}
void loop() {
}

sketch.ino

diagram.json

void init_port(void);
void outdata(char);
void outcontrol(char);
void delay1(int);
void Lcd_control_write(void);
void init_Lcd(void);
void write_data(char);
void init_port()
{
  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 write_string(char *ptr)
{
  for(volatile int i=0;ptr[i]!=0;i++)
  {
    write_data(ptr[i]);
  }
}
void write_string_p(char *ptr,char size)
{
  for(volatile int i=size-1;i>=0;i--)
  {
    write_data(ptr[i]);
  }
}
void outcontrol(char out_data)
{
  volatile char *portk_data = (volatile char*)0x108;
  *portk_data = out_data;
}
void Lcd_control_write(void)
{
  outcontrol(0x01);
  delay(1);
  outcontrol(0x00);
  delay(1);
}
void init_Lcd(void)
{
  outdata(0x38); //8bit 2 line
  Lcd_control_write();
  outdata(0x0f);   //  display on cursor blinking
  Lcd_control_write();
  outdata(0x01); // clear data
  Lcd_control_write();
  outdata(0x06);//auto increment
  Lcd_control_write();
  outdata(0x84); //8bit 2 line
  Lcd_control_write();
}
void write_data(char wr_data)
{
  outdata(wr_data);
  outcontrol(0x02);
  delay(1);
  outcontrol(0x03);
  delay(1);
  outcontrol(0x02);
  delay(1);
}
void display_clear()
{
  outdata(0x01);
      Lcd_control_write();
}
void lcd_Display_Mode(char i)
{
  if(i==0)
  {
   outdata(0x38); //8bit 2 line
  Lcd_control_write();
  }
  else
  {
    outdata(0x28); //4bit 2 line
  Lcd_control_write();
  }
}
void DLP_left_To_right(char *chr,char size,char line)
{
  char dec,FL1,FL,flag=1,c;
  if(line==1)
  {
    FL=0x80;
    FL1=0x80;
  }
  else if(line==2)
  {
    FL=0xc0;
    FL1=0xc0;
  }
  for(volatile char j=0;j<(size*2+8);j++)
  {
  display_clear();
      outdata(FL); //8bit 2 line
      Lcd_control_write();
      if(j!=(size) && flag==1)
    {
      FL=FL1;
     outdata(FL); //8bit 2 line
      Lcd_control_write();  
           c=j;
         for(volatile char i=(size-1-c);c>=0;i++,c--)
                {
                   write_data(chr[i]);
               } 
         if(j>=(size-1))
               {
                flag=0;
               }
    }
    else
    {
  for(volatile char i=0;i<size;i++)
  {
    write_data(chr[i]);
  } 
    }
    display_clear();
  delay(250);
 display_clear();
 FL++;
  }
}
void DLP_str_left_To_right(char *str,char size1,char *chr,char size2,char line,char mid)
{
  char dec,FL1,FL,flag=1,c,*p,temp;
  if(line==1)
  { 
    p=str;
    str=chr;
    chr=p;
    temp=size1;
    size1=size2;
    size2=temp;
    FL1=0x80;
  }
  else if(line==2)
  {
       FL1=0xc0;
  }
  for(volatile char j=0;j<(size2+size2+4);j++)
  { 
     outdata(mid); //8bit 2 line
      Lcd_control_write();
      write_string_p(str,size1);
  display_clear();
      outdata(FL1); //8bit 2 line
      Lcd_control_write();
  for(volatile char i=size2-1;i>-1;i--)
  {
    write_data(chr[i]);
  }
   display_clear();
  for(volatile long i=0;i<100000;i++);
 FL1++;
  }
}
void DLP_str_right_To_left(char *str,char size1,char *chr,char size,char line,char mid)
{
  char FL1,FL2,count=0;
  if(line==1)
  {
    FL1=0x80;
    FL2=0x8f;
  }
  else
  {
  FL1=0xc0;
  FL2=0xcf;
  }
  for(volatile char j=0;j<size+4;j++)
  {
     outdata(mid); //8bit 2 line
      Lcd_control_write();
      write_string(str);
  display_clear();
      outdata(FL2); //8bit 2 line
      Lcd_control_write();
  for(volatile char i=0;i<size+1;i++)
  {
    write_data(chr[i]);
  }
  for(volatile long i=0;i<100000;i++);
 display_clear();
 FL2--;
  }
  for(volatile char j=0;j<size;j++)
  {
     outdata(0x83); //8bit 2 line
      Lcd_control_write();
      write_string(str);
    display_clear();
    outdata(FL1); //8bit 2 line
  Lcd_control_write();
  for(volatile char i=j+1;i<size;i++)
  {
      write_data(chr[i]);
  }
  display_clear();
  for(volatile long i=0;i<100000;i++);
  }  
}
void DLP_right_To_left(char *chr,char size,char line)
{
  char FL1,FL2,count=0;
  if(line==1)
  {
    FL1=0x80;
    FL2=0x8f;
  }
  else
  {
  FL1=0xc0;
  FL2=0xcf;
  }
  for(volatile char j=0;j<(size+3);j++)
  {
  display_clear();
      outdata(FL2); //8bit 2 line
      Lcd_control_write();
  for(volatile char i=0;i<size;i++)
  {
    write_data(chr[i]);
  }
  delay(250);
 display_clear();
 FL2--;
  }
  //display_clear();
  outdata(FL1); //8bit 2 line
  Lcd_control_write();
  for(volatile char j=0;j<size;j++)
  {
    
    display_clear();
    outdata(FL1); //8bit 2 line
  Lcd_control_write();
  for(volatile char i=j+1;i<size;i++)
  {
      write_data(chr[i]);
  }
  delay(250);
 display_clear();
  } 
}
void Display_ON_Cursor_blink()
{
  outdata(0x0f);   //  display on cursor blinking
  Lcd_control_write();
}
void Display_ON_Cursor_off()
{
  outdata(0x0c);   //  display on cursor blinking
  Lcd_control_write();
}
void AutoIncrement()
{
   outdata(0x06);//auto increment
  Lcd_control_write();
}
void AutoDecrement()
{
   outdata(4);//auto increment
  Lcd_control_write();
}

void DLP_revolve_LR(char *str1,char size1,char *str2,char size2)
{
  char dec,FL1,FL2;
  FL1=0x80;
  FL2=0xcf;
  for(volatile char j=0;j<(size2+size2+4);j++)
  { 
     outdata(FL2); //8bit 2 line
      Lcd_control_write();
      write_string(str2);
  display_clear();
      outdata(FL1); //8bit 2 line
      Lcd_control_write();
  for(volatile char i=0;i<size1;i++)
  {
    write_data(str1[i]);
  }
   display_clear();
  for(volatile long i=0;i<100000;i++);
 FL1++;
 FL2--;
    display_clear();


  }
}