[Gearbox-commit] SF.net SVN: gearbox: [163] gearbox/trunk/submitted/gbxgarminacfr/doc.dox

[<rus...@us...>]

Revision: 163
          http://gearbox.svn.sourceforge.net/gearbox/?rev=163&view=rev
Author:   russo2503v
Date:     2008-06-08 02:31:57 -0700 (Sun, 08 Jun 2008)

Log Message:
-----------
added references

Modified Paths:
--------------
    gearbox/trunk/submitted/gbxgarminacfr/doc.dox

Modified: gearbox/trunk/submitted/gbxgarminacfr/doc.dox
===================================================================
--- gearbox/trunk/submitted/gbxgarminacfr/doc.dox	2008-06-08 05:29:36 UTC (rev 162)
+++ gearbox/trunk/submitted/gbxgarminacfr/doc.dox	2008-06-08 09:31:57 UTC (rev 163)
@@ -60,7 +60,7 @@
 - http://en.wikipedia.org/wiki/NMEA
 - http://www.gpsinformation.org/dale/interface.htm
 
-@section gbx_library_gbxgarminacfr What is EPE?
+@section gbx_library_gbxgarminacfr_epe What is EPE?
 
 Bits of information assembled by Duncan Mercer.
 
@@ -205,6 +205,15 @@
 educational to observe.
 @endverbatim
 
+@section gbx_library_gbxgarminacfr_checksum On message checksum
+
+from Garmin: 
+http://www8.garmin.com/support/faqs/faq.jsp?faq=40
+
+Q. How is the checksum calculated in NMEA 0183?
+A.  The checksum is the 8-bit exclusive OR (no start or stop bits) of all characters in the sentence, including the "," delimiters, between -- but not including -- the "$" and "*" delimiters. 
+The hexadecimal value of the most significant and least significant 4 bits of the result are converted to two ASCII characters (0-9, A-F) for transmission. The most significant character is transmitted first.
+
 */
 
 


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