file_to_progmem.c

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

int main(int argc, char *argv[]){
  FILE * fp;
  char *buffer;
  long flen;
  char *fname;
  char pname[1024];
  
  if( argc == 2 ) {
    fname = argv[1];
    strcpy(pname, fname);
    char * dot = strchr(pname, '.');
    while(dot != NULL){
      *dot = '_';
      dot = strchr(pname, '.');
    }
  }else {
    printf("Filename not supplied\n");
    return 1;
  }

  fp = fopen(fname, "rb");
  fseek(fp, 0, SEEK_END);
  flen = ftell(fp);
  rewind(fp);

  buffer = (char *)malloc((flen+1)*sizeof(char));
  fread(buffer, flen, 1, fp);
  fclose(fp);
  
  printf("\n//File: %s, Size: %lu\n",fname, flen);
  printf("#define %s_len %lu\n", pname, flen);
  printf("const uint8_t %s[] PROGMEM = {\n", pname);
  long i;
  for(i=0;i<flen;i++){
    printf(" 0x%02X", (uint8_t)buffer[i]);
    if(i<(flen - 1)){
      printf(",");
    }
    if((i%16)==15){
      printf("\n");
    }
  }
  printf("\n};\n\n");
  free(buffer);
  return 0;
}