Бегущая строка

#include <avr/io.h>
#include <string.h>
#include <util/delay.h>
#include "lcd_lib.h"

#define LINE 16

char *str = "Postapokaliptichesky1232323123";
char *pstr;
char buf[LINE + 1];

void lcd_clear() {
    LCDsendCommand(0x01);
}

void lcd_zero_coord() {
    char y = 0;
    char x = 0;
    LCDsendCommand(0x80 | ((0x40 * y) + x));
}

void lcd_data(char byte) {
    LCDsendChar(byte);
}

void lcd_str(char *s) {
    while (*s != '\0') lcd_data(*(s++));
}


int main(void) {
    LCDinit();
    lcd_clear();
    while (1) {
      int len = strlen(str) + LINE;
      for (int i = 0; i < len; ++i) {
          lcd_clear();
          lcd_zero_coord();

          strcpy(buf, str);
          int spaces = LINE - i;

          buf[i] = '\0';
          pstr = buf;

          if (spaces > 0) for (int s = 0; s < spaces; ++s) lcd_data(' ');
          else pstr += i - LINE;

          lcd_str(pstr);
          _delay_ms(100);
      }
    }
}