// Autor: dr inz. Krzysztof Murawski
#include <REGX52.H>

extern void LcdInit();
extern void LcdWelcome() reentrant;
extern void Lcd_Cursor (char row, char column);
extern void Lcd_DisplayCharacter (char a_char);
extern void Lcd_DisplayString (char row, char column, char *string) reentrant;
extern void Lcd_WriteControl (unsigned char LcdCommand);

unsigned char data Var1, Var2, Var3;
unsigned char data i = 1;
unsigned char data j = 1;
unsigned char data traj,r,k;
unsigned char data czysta = ' ';

volatile unsigned char data Bufor[] = {"Wozniakowski"};

	void button1() interrupt 0
	{
		Lcd_WriteControl(0x01);
		i++;
		if(i == 17)
				{
					i = 1;
					j++;
					if(j == 5) j=1;
				}
		 i = r;
		 j = k;
		for(traj = 0; traj < (sizeof(Bufor)/sizeof(char)-1); traj++)
		{
				Lcd_Cursor(r,k);
				Lcd_DisplayCharacter(Bufor[traj]);
				r++;
				if(r == 17)
				{
					r = 1;
					k++;
					if(k == 5) k=1;
				}
			}
		}




	void button2() interrupt 2
{
	Lcd_Cursor(i,j);
		Lcd_DisplayCharacter(czysta);
		j--;
		if(j == 0)
		{
			j = 16;
		  i--;
			if( i == 0) i=4;
		}
		Lcd_Cursor(i,j);
		Lcd_DisplayCharacter(traj);
}

void Init(void)
  {
    EX0 = 1;
    IT0 = 1;
		EX1 = 1;
		IT1 = 1;
    EA  = 1;
  }

void main(void)
  {
   LcdInit();	  	  // Zainicjowanie rejestrów wyœwietlacza LCD
   Init();
	 LcdWelcome();	//uzyte by pozbyc sie bledow L57
		Lcd_WriteControl(0x01);	//uzyte by pozbyc sie bledow L57
		Lcd_DisplayString(1,1,Bufor);
   while(1) {;}
  }