j1939

.. toctree::
   :maxdepth: 2

.. automodule:: canlib.j1939

Protocol Data Units

.. autoclass:: canlib.j1939.Pdu
    :members:
    :undoc-members:

.. autoclass:: canlib.j1939.Pdu1
    :members:
    :undoc-members:

.. autoclass:: canlib.j1939.Pdu2
    :members:
    :undoc-members:

For a j1939 message, the CAN identifier is divided into the following fields:

Priority	Extended Data Page	Data Page	PDU Format	PDU Specific	Source Address
3 bit	1 bit	1 bit	8 bit	8 bit	8 bit

Use pdu_from_can_id and can_id_from_pdu to convert.

.. autofunction:: canlib.j1939.pdu_from_can_id

.. autofunction:: canlib.j1939.can_id_from_pdu