Can't send multiple CAN FD messages with 1 send block on Speedgoat

Question

Szilard Hegyi 2023-11-10

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https://ww2.mathworks.cn/matlabcentral/answers/2045585-can-t-send-multiple-can-fd-messages-with-1-send-block-on-speedgoat

评论： Szilard Hegyi 2023-11-14

Hi

I was wondering if it is a limitation, or a bug, that while using the CAN IO602-4 send block for sending CAN FD frames, if I try to send multiple messages joining them in a MUX block, I get an error that a CAN FD bus is type expected , despite using the CAN FD Pack and setting the number of messages to 2-3 or more.

The port is also set to send CAN-FD frames, and it works with a single frame. If I want to send more, I have to use multiple send blocks, , and in the case of like 8-10 messages the Target machine returns an Overload error.

Do you have any idea what the problem might be. It works with standard CAN frames, but with CAN FD I get the issue above.

I'm using Matlab version R2022b UPDATE 6 with Speedgoat blockset 9.7.0.1

Thanks

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Answer 1

Dimitri MANKOV 2023-11-14

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Hi Szilard,

Could you try using a "Vector Concatenate" block instead of a "Mux" block to pass several CAN-FD messages to the "CAN Send" block? This is how the CAN-FD loopback example model from Speedgoat is designed.

I hope this is helpful!

Dimitri

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Szilard Hegyi 2023-11-14

Wow, thanks, that really worked. Temporary workaround I tried was connecting two ports on the same CAN bus, and using one of them for CAN FD, but this solved all our issues

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