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sebi2k1 / node-can

NodeJS SocketCAN extension
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Multiplexing limitation: No extended multiplexing support. #55

Open juleq opened 5 years ago

juleq commented 5 years ago

The current implementation does not support extended multiplexing.

Extended multiplexing allows defining several multiplexors in a message and a signal can be multiplexed for more than one multiplexor value. A multiplexed signal can also serve as multiplexor signal for other multiplexed signals, meaning that hierarchical multiplexing can be modeled.

-> Extended multiplexing would be a great enhancement but likely requires a little remodeling of the current object structure. That could require breaking changes.

The quote above is taken from the Vector document below, but the kcd file format also supports it: Extended Multiplexing

sebi2k1 commented 5 years ago

You got an example for KCD referencing the same signal in multiple groups and using a signal as a muxer?

juleq commented 5 years ago

Hi. I think extended multiplexing is not that important since the standard version of CANdb++ is not supporting it either. KCD is very flexible and I would not advocat that supporting that kind of flexibility is that important either. But understanding multiplexors to be regular signals with various type/length/positioning is quite common and supported by CANdb++. Should I upload such a db as dbc/kcd for you?