#include <REGX52.H>

unsigned char xdata Lewy _at_ 0xFE00;
unsigned char xdata Prawy _at_ 0xFD00;

void init(void);


//Uklad 2 wyswietlacz
//1111 1110 0000 0000 - lewy wyswietlacz -> 0xFE00
//1111 1101	0000 0000 - prawy wyswietlacz -> 0xFD00



unsigned char code tab[] = { 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};

int l = 0;
int p = 0;
int a = 0;


	void ISR_INT0(void) interrupt 0
		{
			if(a == 0)
			{
				a = 1;
			}
			else
			{
				a = 0;
			}
		}

		void Timer(void) interrupt 1
 {


		TH0 = 0x8F;
		TL0 = 0x7F;
		TF0 = 0;

			if(a == 0)
			{
			  p++;
			  if(p == 10)
					{
							p = 0;
							l++;
							if(l == 10)
							{
								p=9;
								l=9;
							}
					}
			}

			else
				{
			     p--;
					if(p == -1)
						{
							p = 9;
							l--;
							if(l == -1)
							{
								p=0;
								l=0;
							}
					  }
			}

 }


	void main(void)
	{
		init();
		for(;;)
		{
			Lewy = tab[l];
			Prawy =tab [p];
		}
	}




void init(void)
	{

		TMOD = 0x01;
		TH0 = 0x8F;
		TL0 = 0x7F;
		ET0 = 1;

		EX0 = 1;
		IT0 = 1;
		EA = 1;
		TR0 = 1;



	}