//Inculde Header Files-----------------------------------------------
#include<stdlib.h>
#include<stdio.h>
#include<errno.h>
#include<sys/time.h>
#include<unistd.h>
#include<termios.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<sys/resource.h>
#include<pthread.h>
#include<signal.h>

//Enumerations-------------------------------------------------------
typedef enum {false, true} bool; 
typedef enum {idle,
		      prog_enable,
		      page_read,
		  	  page_write,
		  	  prog_check} mode;

//Constants----------------------------------------------------------
#define nibble_lo 0x0F
#define nibble_hi 0xF0
#define frame_mask 0x90
#define page_size 64

//Structs------------------------------------------------------------
typedef struct {
	char mode;
	char opt_lo;
	char opt_hi;
} cmd_t;

//Makros-------------------------------------------------------------
#define error_handler(err_no, err_str) 	\
					errno = err_no;		\
					perror(err_str);	\
					exit(EXIT_FAILURE);

//Protoypes----------------------------------------------------------
void * signal_thread(void * arg_ptr);
void set_timer(int sec, int usec);
char * cmd_build(mode cmd_mode, char cmd_option);
char * page_build(char size);
unsigned char * page_mask(char * page_build_ptr, int page_end);
int page_get(FILE * input_stream, int page_pos);

//Global Variables---------------------------------------------------
char cmd_arr[3];
bool timer_state;
unsigned char page_buf[64];