void init_port(void);
void outport(char);
void RS_Enable_pin(char);
void delay1(int);
void lcd_control_write(void);
void init_lcd(void);
void write_data(char);
void write_string(char *ptr);
void scroll_display_infinite(void);

void setup() {
    init_port();
    init_lcd();
    write_string("Ankit Harsh");
    delay1(2000); // Wait 2 seconds to read the message
    scroll_display_infinite(); // Start infinite scrolling
}

void write_string(char *ptr) {
    while (*ptr != 0) {
        write_data(*ptr);
        ptr++;
    }
}

void init_port() {
    volatile char *portb_dir  = (volatile char *)0x24;
    volatile char *portd_dir  = (volatile char *)0x2A;
    volatile char *portc_dir  = (volatile char *)0x27;
    *portb_dir = 0x0F; // Set PORTB for output
    *portd_dir = 0xF0; // Set higher nibble of PORTD for output
    *portc_dir = 0x03; // Set lower bits of PORTC for output
}

void outport(char out_data) {
    volatile char *portb_data = (volatile char *)0x25; 
    volatile char *portd_data = (volatile char *)0x2B; 
    *portb_data = out_data >> 4; // Send high nibble
    *portd_data = out_data << 4; // Send low nibble
}

void RS_Enable_pin(char out_data) {
    volatile char *portc_data = (volatile char *)0x28; 
    *portc_data = out_data; // Control RS pin
}

void init_lcd(void) {
    outport(0x38);   // 8-bit, 2 lines
    lcd_control_write();
    delay1(2);       // Delay for stability
    outport(0x0F);   // Display on, Cursor Blinking
    lcd_control_write();
    delay1(2);       // Delay for stability
    outport(0x01);   // Clear Display
    lcd_control_write();
    delay1(2);       // Delay for clearing the display
    outport(0x06);   // Auto Increment
    lcd_control_write();
    delay1(2);       // Delay for stability
}

void write_data(char wr_data) {
    outport(wr_data);
    RS_Enable_pin(0x02); // RS high for data
    delay(1);
    RS_Enable_pin(0x03); // Enable high
    delay(1);
    RS_Enable_pin(0x02); // Enable low
    delay1(2);           // Delay for data to be processed
}

void lcd_control_write(void) {
    RS_Enable_pin(0x01); // RS low for command
    delay(1);
    RS_Enable_pin(0x00); // Enable low
    delay1(2);           // Delay for command to be processed
}

void delay1(int count) {
    volatile long i;
    while(count) {
        for(i=0; i<1000; i++);
        count--;
    }
}

// Function to scroll the message infinitely
void scroll_display_infinite() {
    while (1) { // Infinite loop
        for (int i = 0; i < 16; i++) { // Scroll for the length of the display
            outport(0x1C); // Scroll display right
            lcd_control_write();
            delay1(150); // Delay for scrolling effect
        }
        outport(0x01); // Clear the display after scrolling
        lcd_control_write(); // Execute the clear command
        delay1(2); // Wait for the display to clear
        outport(0x80); // Move cursor back to the start
        write_string("Ankit Harsh"); // Reprint the message
        delay1(2000); // Wait for 2 seconds before scrolling again
    }
}

void loop() {
    // No code here
}