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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                   : ORPSoC v2

// File Name                      : bin2hex.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 basic ASCII hex output to stdout from binary file input

// Compile and run the program with no options for usage.

//

#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;

        int c;

        int i = 0;

        int write_size_word=0; // Disabled by default

        int filename_index=1;

        int bytes_per_line=1;

        int bytes_per_line_index=2;

        int padding = 0;

        unsigned int image_size;

        if(argc < 3) {

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

          fprintf(stderr,"\tPlease specify, in this order: a binary file to\n");

          fprintf(stderr,"\tconvert and the number of bytes of data to putput\n");

          fprintf(stderr,"\tper line.\n");

          fprintf(stderr,"\tOptionally specify the option -size_word to output,\n");

          fprintf(stderr,"\tthe size of the image in the first 4 bytes. This is\n");

          fprintf(stderr,"\tused by some of the new OR1k bootloaders.\n\n");

          fprintf(stderr,"\tOptionally specify padding to be applied to the file,\n");

          fprintf(stderr,"\twith the -pad switch, followed by either decimal or\n");

          fprintf(stderr,"\thexademical format offset. Value is in bytes, pad\n");

          fprintf(stderr,"\tfill will be zeros.\n");

          fprintf(stderr,"\n");

          exit(1);

        }

        if (argc >= 4)

          {

            for (i = 1; i< argc; i++)

              {

                if ((strcmp("-pad", argv[i]) == 0) ||

                    (strcmp("--pad", argv[i]) == 0))

                  {

                    if (i+1 < argc)

                      {

                          if (1 == (sscanf(argv[i+1], "0x%x", &padding)))

                            i++;

                          else if (1 == (sscanf(argv[i+1], "%d", &padding)))

                            i++;

                          //fprintf(stderr,"Padding offset: 0x%x\n",padding);

                      }

                  }

              }

            // This will always be in argv[3]

            if (strcmp("-size_word", argv[3]) == 0)

              // We will calculate the number of bytes first

              write_size_word=1;

          }

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

        bytes_per_line = atoi(argv[bytes_per_line_index]);

        if ((bytes_per_line == 0) || (bytes_per_line > 8))

          {

            fprintf(stderr,"bytes per line incorrect or missing: %s\n",

                    argv[bytes_per_line_index]);

            exit(1);

          }

        // Now subtract 1 from bytes_per_line

        //if (bytes_per_line == 2)

        //  bytes_per_line--;

        if (fd == NULL) {

                fprintf(stderr,"failed to open input file: %s\n",argv[1]);

                exit(1);

        }

        i=0;

            // Write out padding bytes amount of zeros

        while (padding) {

          printf("00");

          if (++i == bytes_per_line) {

            printf("\n");

            i = 0;

          }

          padding--;

        }

        if (write_size_word)

          {

            // or1200 startup method of determining size of boot image we're 

            // copying by reading out 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);

            // Now we should have the size of the file in bytes. Let's ensure 

            // it's a word multiple

            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

            i=0;

            printf("%.2x",(image_size >> 24) & 0xff);

            if(++i==bytes_per_line){ printf("\n"); i=0; }

            printf("%.2x",(image_size >> 16) & 0xff);

            if(++i==bytes_per_line){ printf("\n"); i=0; }

            printf("%.2x",(image_size >> 8) & 0xff);

            if(++i==bytes_per_line){ printf("\n"); i=0; }

            printf("%.2x",(image_size) & 0xff);

            if(++i==bytes_per_line){ printf("\n"); i=0; }

          }

        // 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++)

          c=fgetc(fd);

        i=0;

        // Now write out the binary data to hex format

        while ((c = fgetc(fd)) != EOF) {

                printf("%.2x", (unsigned int) c);

                if (++i == bytes_per_line) {

                        printf("\n");

                        i = 0;

                }

        }

        return 0;

}