CANbus / OBDII plank?

Thanks for the feedback!

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From Jack with dafulaielectronics.com:

"We just released this CAN bus Analyzer/Simulator.

Datasheet for simulator is link below:

http://dafulaielectronics.com/CANBUS_Simulator.pdf

Software for simulator:

http://dafulaielectronics.com/CANSimulator.zip

In your customer software to call simulator software (Integrate Simulator to your test environment), there is an example source code:

http://dafulaielectronics.com/ThirdParty_Call_CANSimulator.zip

Datasheet for .net component of this device:

http://dafulaielectronics.com/CANBUS_NET_Component.pdf

.net Component Software:

http://dafulaielectronics.com/CANCtrl.zip

Analyzer Datasheet:

http://dafulaielectronics.com/CANBUS_Analyzer.pdf

Analyzer Software:

http://dafulaielectronics.com/CANAnalyzer.zip

Please order on line if you want,

And it has 2 functions: Simulator , Analyzer.

You can choose what you want when you pay."

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Here is a simulator as well as all the file types supported by the forum. It would require some work, but I have the dev info for the software. Worth looking into. If your interested, i can zip up all the dev files next time I’m at my desk.



tb00185733-j1939-simulator-BOM-V2024-07-10T024555287Z.zip (20.7 KB)
tb00185733-j1939-simulator-Gerbers-Version78815411.zip (1013.0 KB)

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11.3.1.3 Interoperability of 3.3-V CAN in 5-V CAN Systems
The 3.3 V supplied SN65HVD23x family of CAN transceivers are fully compatible with 5 V CAN transceivers. The
differential output voltage is the same, the recessive common mode output bias is the same, and the receivers
have the same input specifications. The only difference is in the dominant common mode output voltage is lower
in 3.3 V CAN transceivers than with 5 V supplied transceiver (by a few hundred millivolts).

To help ensure the widest interoperability possible, the SN65HVD23x family has successfully passed the
internationally recognized GIFT ICT conformance and interoperability testing for CAN transceivers which is
shown in . Electrical interoperability does not always assure interchangeability however.

Was looking at parts for this board and dug into the 3.3v/5volt thing. It seems it is only the power supply? The differential levels tend to be compatible?

  • TJA1050 3.48@100
  • SN65HVD230 1.95@100

If they’re mostly compatible, then I guess the TI part is the way to go due to cost, more modern design, testing, and reference design materials.

I also recommend to add the ability to connect striped wires, because usually the connectors are custom and it is sometimes easier to just connect the wire than soldering it onto a RS232 socket.

Further more, could you please also make a plank for automotive ethernet?
modern vehicles are slowly transitioning to it instead of canbus.

Definitely screw terminals and/or wago style quick connects.

Automotive ethernet is interesting. I had a look at whats out there. It seems the cheap debug tools are USB and enumerate as a ethernet device. The RP2040 has a really slow USB peripheral, it might be a bottleneck.