#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#include <ftw.h>
#include <string.h>

#define READ_SIZE		512
#define READ_BUF_LEN	2048
#define DEV_NAME	"/sys/bus/spi/devices/spi0.0/fram"

int main(int argc, char ** argv)
{
	char read_buffer[READ_SIZE]={0,};
	char *device = NULL;
	int i,j,k;
	unsigned int fd;
	unsigned int size;

	device = argv[1];

	if(argc < 3)
		device = DEV_NAME;


	fd = open (device, O_RDWR);
	if(fd < 0)
	{
		fputs("Error \n",stderr);
		exit(1);
	}

	printf("       0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F");


	for(i=0, k=0; i<4; i++)
	{
		size = read(fd, read_buffer, READ_SIZE);

		for(j=0; j<READ_SIZE; j++)
		{
			if( !(k%16) )
				printf("\n %03X: ",k&(~0x1));

			k++;
			printf("%02X ",read_buffer[j]);
		}
		printf("\n=====================================================\n");
		printf("ReadSize: %d\n",size);
	}

	close(fd);

	return 0;
}