Difference between revisions of "J1939"

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[[Category:Networking]]
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= SAE J1939 in Linux =
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== overview ==
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See also on [http://en.wikipedia.org/wiki/J1939 Wikipedia].
  
== SAE J1939 overview ==
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SAE J1939 defines a higher layer protocol on CAN. It implements a more
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sophisticated addressing scheme and extends the maximum packet size above
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8 bytes. Several derived specifications exists, which differ from the
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original j1939 on the application level, like MilCAN, NMEA2000 and
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especially ISO-11783 (ISOBUS). This last one specifies the so-called ETP
 +
(Extended Transport Protocol) which is has been included in this
 +
implementation. This inclusion results in a maximum packet size of
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((2^24)-1)*7 bytes
  
== SAE J1939 support in Linux ==
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=== Specifications ===
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* SAE J1939-21 : data link layer
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* SAE J1939-81 : network management
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* ISO 11783-6  : Virtual Terminal (Extended Transport Protocol)
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== Sources ==
 
Support for SAE J1939 in Linux consists of 3 parts:
 
Support for SAE J1939 in Linux consists of 3 parts:
 
* [http://gitorious.org/~kurt-vd/linux-can-j1939 j1939 linux kernel]
 
* [http://gitorious.org/~kurt-vd/linux-can-j1939 j1939 linux kernel]
* [http://gitorious.org/~kurt-vd/can-utils-j1939 j1939 can-utils]
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* [http://gitorious.org/~kurt-vd/can-j1939-utils j1939 can-utils]
 
* [http://gitorious.org/~kurt-vd/iproute2-j1939 j1939 iproute2]
 
* [http://gitorious.org/~kurt-vd/iproute2-j1939 j1939 iproute2]
  
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The final goal is to have these source trees mainlined.
 
The final goal is to have these source trees mainlined.
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== Howto ==
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todo...

Revision as of 14:55, 13 March 2013

SAE J1939 in Linux

overview

See also on Wikipedia.

SAE J1939 defines a higher layer protocol on CAN. It implements a more sophisticated addressing scheme and extends the maximum packet size above 8 bytes. Several derived specifications exists, which differ from the original j1939 on the application level, like MilCAN, NMEA2000 and especially ISO-11783 (ISOBUS). This last one specifies the so-called ETP (Extended Transport Protocol) which is has been included in this implementation. This inclusion results in a maximum packet size of ((2^24)-1)*7 bytes

Specifications

  • SAE J1939-21 : data link layer
  • SAE J1939-81 : network management
  • ISO 11783-6  : Virtual Terminal (Extended Transport Protocol)

Sources

Support for SAE J1939 in Linux consists of 3 parts:

You probably want all 3 components to get a J1939 linux node working.

The final goal is to have these source trees mainlined.

Howto

todo...