fatfs v0.13b April 07, 2018:

- Added support for UTF-32 encoding on the API. (FF_LFN_UNICODE = 3)
- Added support for Unix style volume ID. (FF_STR_VOLUME_ID = 2)
- Fixed accesing any object on the exFAT root directory beyond the cluster boundary can fail. (appeared at R0.12c)
- Fixed f_setlabel() does not reject some invalid characters. (appeared at R0.09b)

documents/doc/read.html

@@ -34,7 +34,7 @@ FRESULT f_read (
 <dt>btr</dt>
 <dd>Number of bytes to read in range of <tt>UINT</tt> type.</dd>
 <dt>br</dt>
-<dd>Pointer to the <tt>UINT</tt> variable to return number of bytes read. This value is always valid after the function call regardless of the return value.</dd>
+<dd>Pointer to the <tt>UINT</tt> variable to return number of bytes read. This value is always valid after the function call regardless of the function return code.</dd>
 </dl>
 </div>