Convert a string to printable characters (in-place).

Parameters:

[in,out]	str	String to convert
[in]	len	Maximum number of characters to convert, or <= 0 to convert all.

Definition at line 469 of file tripplite_usb.c.

References toprint.

{
      int i;
      if(len <= 0) len = strlen(str);
      for(i=0; i < len; i++)
            str[i] = toprint(str[i]);
}