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