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/*$$HEADER*/

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/*                    H E A D E R   I N F O R M A T I O N                     */

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// Project Name                   : 

// File Name                      : bin2binsizeword.c

// Prepared By                    : 

// Project Start                  : 

/*$$COPYRIGHT NOTICE*/

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/*                      C O P Y R I G H T   N O T I C E                       */

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/*

  This library is free software; you can redistribute it and/or

  modify it under the terms of the GNU Lesser General Public

  License as published by the Free Software Foundation;

  version 2.1 of the License, a copy of which is available from

  http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt.

  This library is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public

  License along with this library; if not, write to the Free Software

  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

*/

/*$$DESCRIPTION*/

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/*                           D E S C R I P T I O N                            */

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//

// Generates a binary file, but with the first word replaced as the size of the 

// image in big endian format

//

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

/* Number of bytes before line is broken

   For example if target flash is 8 bits wide,

   define BREAK as 1. If it is 16 bits wide,

   define it as 2 etc.

*/

#define BREAK 1

int main(int argc, char **argv)

{

  FILE  *fd, *dest_fd;

  int i = 0;

  int n;

  int filename_index=1;

  int output_filename_index=2;

  unsigned int image_size;

  if(argc < 2)

    {

      fprintf(stderr,"Usage: bin2binsizeword INFILE OUTFILE\n");

      fprintf(stderr,"Copy contents of INFILE to OUTFILE, replacing the first word of INFILE with the\n");

      fprintf(stderr,"size of the file in bytes.\n\n");

      fprintf(stderr,"\tInsufficient options.\n");

      fprintf(stderr,"\tPlease specify an input and then an output name.\n");

      fprintf(stderr,"\n");

      return 1;

    }

  // Open input file

  fd = fopen( argv[filename_index], "r" );

  if (fd == NULL)

    {

      fprintf(stderr,"failed to open input file: %s\n",argv[filename_index]);

      return 1;

    }

  // Open the output file

  dest_fd = fopen( argv[output_filename_index], "w");

  if ( dest_fd == NULL )

    {

      fprintf(stderr,"failed to open output file: %s\n",argv[output_filename_index]);

      return 1;

    }

  // the very first word in flash is used. Determine the length of this file

  fseek(fd, 0, SEEK_END);

  image_size = ftell(fd);

  fseek(fd,0,SEEK_SET);

  // This bit ensures the size word is a word multiple, but that shouldn't be 

  // required.

  //image_size+=3;

  //image_size &= 0xfffffffc;

  // Sanity check on image size

  if (image_size < 8){

    fprintf(stderr, "Bad binary image. Size too small\n");

    return 1;

  }

  // Now write out the image size, BIG ENDIAN

  i=0;

  unsigned char data_byte;

  data_byte = (image_size >> 24) & 0xff;

  fwrite(&data_byte, 1, 1, dest_fd);

  data_byte = (image_size >> 16) & 0xff;

  fwrite(&data_byte, 1, 1, dest_fd);

  data_byte = (image_size >> 8) & 0xff;

  fwrite(&data_byte, 1, 1, dest_fd);

  data_byte = (image_size >> 0) & 0xff;

  fwrite(&data_byte, 1, 1, dest_fd);

  // Now copy the binary file into RAM

  // Fix for the current bootloader software! Skip the first 4 bytes of 

  // application data. Hopefully it's not important. 030509 -- jb

  for(i=0;i<4;i++)

    n = fread(&data_byte,1,1,fd);

  while(i<image_size)

    {

      n = fread(&data_byte,1,1,fd);

      if (!n)

        {

          fprintf(stderr,"error reading input file\n");

          fclose(fd);

          fclose(dest_fd);

          return 1;

        }

      fwrite(&data_byte, 1, 1, dest_fd);

      i++;

    }

  fclose(fd);

  fclose(dest_fd);

  return 0;

}