Yes.


The article is very short and doesn't show any details.


Thanks,

Isaac



Em 3/3/2013 13:49, alan.b.pearce@stfc.ac.uk escreveu:
> Have you looked at http://en.wikipedia.org/wiki/NMEA_2000 ?
>
>
>
>> I need to read data from a John Deere GPS. The GPS doesn't use the
>> traditional RS-232 interface with NMEA protocol, but instead it uses a
>> CAN bus at 250kbps and sends GPS data in NMEA2000 format inside CAN
>> packets.
>>
>> The CAN BUS is populated by the GPS, a monitor and an auto-pilot.
>>
>> I got Bosch's documentation on CAN BUS (free) and also ISO 11783
>> standards. Interestingly, Bosch published their invention for free, then
>> comes ISO, adopts it and starts selling the documentation :(
>>
>> Somewhere in ISO 11783-* I found that the NMEA 2000 messages are
>> standardized as IEC 61162-3.
>>
>> I bought standard IEC 61162-3 for US$177.00 in the hope that it would
>> detail the packets' structures and data types, but it revealed to be a
>> very general overview of the protocol and doesn't give any pointers to
>> which other documents detail each message.
>>
>> I simply can't afford buying all the related standards to try to find
>> the one I need.
>>
>> I sniffed the CAN bus with a Saleae's Logic and an Atmel ATSAM3X-EK, and
>> captured a lot of traffic. Below are the CAN IDs of some of the packets:
>>
>> 83885952
>> 218103594
>> 419429139, 419430163
>> 484910620
>> 218034972, 218031644, 218032156, 351240220, 218103580, 419430172,
>> 150994716
>> 484900646, 486538790
>> 419430354
>> 485162790
>> 217022492
>>
>>
>> Does someone know anything about NMEA 2000, and more specifically
>> NMEA
>> 2000 over CAN BUS?
>>
>>
>> Thanks,
>>
>> Isaac
>>
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