convert_bootloader_file.c

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#include <stdio.h>
#include <stdlib.h>

#define CONST_START_ADRESS 0x2500
#define CODE_START_ADRESS 0x2590
#define TAILLE_MEMOIRE_CONST (CODE_START_ADRESS-CONST_START_ADRESS)
#define INPUT_PATH "./bootloader_ascii.txt"
#define OUTPUT_PATH "./bootloader_raw.txt"

char convert(char c){

  if (c >=48 && c <= 57)
    return (c-48);
  else  return (c-55);

}

int main (void){

  FILE *fich_in,*fich_out;
  int cpt_octet=0,i,retour;
  char start_const[]="@2500";
  char start_boot[]="@2590";
  char IT_timer[]="@FFFA";
  char value0,value1,result;
  char chaine[16],lsb[3],msb[3];
  
  printf("-----Welcome to \"Convert bootloader file\" (CAIRN 2009)-----\n\n");
  printf("This software convert output file from bootloader node\ncompilation to a node's loadable file.\n\n");
  
  printf("input file : \"");
  printf(INPUT_PATH);
  printf("\"\n");
  
  printf("output file : \"");
  printf(OUTPUT_PATH);
  printf("\"\n\n");
  
  fich_in = fopen(INPUT_PATH,"r");
  fich_out = fopen(OUTPUT_PATH,"w");
  
  if( fich_in != 0 && fich_out != 0 ){
    
    /* find the start point of constant memory area */
    do{
      retour = fscanf(fich_in,"%s",chaine);

    }while( retour != EOF && strcmp(chaine,start_const) != 0 );
  
      
    if(retour != EOF && strcmp(chaine,start_const) == 0){ /* if we have the corresponding keyword for constant adress memory area then process file */  
    
      while( fscanf(fich_in, "%s",chaine) == 1 && strcmp(chaine,start_boot) != 0){  /* convert ascii to binary until end of contant data area */
      
        value0 = convert(chaine[0]);    /*  extract and convert LSB */
        value1 = convert(chaine[1]);    /*  extract and convert MSB */
        result = (value0 << 4) | value1;  /*  mix the two result in one word */
        fprintf(fich_out,"%c",result);    /*  print the word on stdout */
        cpt_octet++;        /*  count number of data converted */
      }
      
      result = 0xFF;
      for (i=0;i<TAILLE_MEMOIRE_CONST-cpt_octet;i++)  /* fill rest of constant data area */
        fprintf(fich_out,"%c",result);    /* with 0xFF */
      
      while( fscanf(fich_in, "%s",chaine) == 1 && chaine[0] != '@'){  /* if we have the corresponding keyword for bootloader start adress then process file */
                        /* while we find IT vector area */    
        value0 = convert(chaine[0]);    /*  extract and convert LSB */
        value1 = convert(chaine[1]);    /*  extract and convert MSB */
        result = (value0 << 4) | value1;  /*  mix the two result in one word */
        fprintf(fich_out,"%c",result);    /*  print the word on stdout */
        
      }
      
      retour = 1;
      
      while(  retour == 1 && strcmp(chaine,IT_timer) != 0){ /* if we have the corresponding keyword for bootloader start adress then process file */
        fscanf(fich_in, "%s",chaine);     /* while we find IT vector area */  
        printf("passe ici\n");
      }           
      
      fscanf(fich_in, "%s",lsb);
      fscanf(fich_in, "%s",msb);
      printf("adresse IT TIMER : 0x%s%s (a reporter dans reprogrammation.h)\n\n",msb,lsb);
      
      fclose(fich_in);
      fclose(fich_out);
      return(0);
    }
    else {
      printf("error : wrong input file\n");
      return(-1);
    }
  }
  else{

    printf("error : no input file (bootloader_ascii.txt)\n");
    return(-1); 
  
  }
}

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