/* Prints a hexadecimal value in plain characters, along with the char equivalents in the following format. 
AA BB CC DD EE FF ...... */
void pn532PrintHexChar(const byte_t *pbtData, const size_t szBytes)
/* Prints a hexadecimal value in plain characters, along with the char equivalents in the following format. 
AA BB CC DD EE FF ...... */
void pn532PrintHexChar(const byte_t *pbtData, const size_t szBytes)
{
  size_t szPos;
  for (szPos=0; szPos < szBytes; szPos++) 
  {
    printf("%02x", pbtData[szPos]);
  }
  printf("  ");
  for (szPos=0; szPos < szBytes; szPos++) 
  {
    printf("%c", pbtData[szPos] <= 0x1F ? '.' : pbtData[szPos]);
  }
  printf(CFG_PRINTF_NEWLINE);
}