I assume you are trying to read something like active DTC codes, and you have more than one so the node you are communicating with wants to send you a BAM, prior to the spew of packets holding the array of DTCs. Is that right?
Also, interesting that you ask for J1939 that works with the channel API. The only examples provided for J1939 here are based on the frame API, which precludes you from using the channel API with a CAN database on the same port.
I do not think that BAM messaging or TP is worked into the example J1939 driver based on the frame API, so you would need to buy the SAE spec and add code to their example.
By the way, DMC recently developed a set of J1939 protocol drivers for LabVIEW which are based on the NI-CAN channel API. The drivers are written in LabVIEW just like the example, but provide functions at a layer above the base CAN channel API layer. This allows the simultaneous capture of data from both J1939 packets which are simple broadcast CAN frames, or more complex transport using BAM, including extended data frames.
