#include <ez8.h>

near unsigned char byte1;
near unsigned char byte2;
near unsigned char counter;
long x;

#define STR	0x01;
#define DAT	0x02;
#define CLK	0x04;

void clock(void)
{
	PAOUT &= ~CLK;
	PAOUT |= CLK;
}

void strobe(void)
{
	PAOUT &= ~STR;
	PAOUT |= STR;
}

void out_LEDs(void)
{
	asm("ld _counter,#16");
asm("back:");
	PAOUT &= ~DAT;
	asm("rlc _byte1");
	asm("rlc _byte2");
	asm("jr nc,clkin");
	PAOUT |= DAT;
asm("clkin:");
	clock();
	asm("dec _counter");
	asm("jr	nz,back");
	strobe();
}

void init_gpio(void)
{
	PADD = 0x00;
	PAOUT = 0xFF;
}

void main(void)
{
	DI();
	init_gpio();
back:
	byte1 = 0x00;
	byte2 = 0xFF;
	out_LEDs();
	for(x=0; x<20000; x++){}
	byte1 = 0xFF;
	byte2 = 0x00;
	out_LEDs();
	for(x=0; x<20000; x++){}
	goto back;
}