#include <reg52.h>
#include <stdio.h>

void outs(unsigned char datouts);
void out(unsigned char datout);
void stop();
unsigned char in();
void byte_write(unsigned char w_control,unsigned char addr_high,unsigned char addr_low,unsigned char d_write);
unsigned char byte_read(unsigned char w_control,unsigned char r_control,unsigned char addr_high,unsigned char addr_low);