Simulink CAN timeout on embedded coder

Question

Marek Laszlo 2016-8-14

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评论： Marek Laszlo 2018-3-26

Hello,

I am coding in Simulink using c2800x package, Embedded coder and Vehicle Networks Toolbox. I am using CAN bus in my application. What I could not solve is how to detect that I didnt receive message in some time (timeout. My code model is encapsulated in function call block of 100hz. Each eCAN receive block has its function call that calls can unpack. I tried to use CAN unpack timestamp or cantimeout block but it doesnt work on target. So I was trying to run some type of down counter outside of the can handling function block and reset it always when can message is received. Actually I didnt found any way to reset the counter out of the CAN receive function call. Mostly it wanted to use transition block which is not suitable. Any suggestions how to get some type of normal simulink signal out of that call or other way around?

Thank You for help.

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Marek Laszlo 2017-10-25

Hello,

Unfortunately I Didnt but I havent been looking for long because the project stopped at that time. So its still actual and would be happy if someone found how to deal with it.

Birdman 2017-10-25

Hi Marek,

Can you share the simulink model(export to R2017a)?

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Answer 1

Marek Laszlo 2018-3-11

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编辑：Marek Laszlo 2018-3-11

I used TI F28337 MCU that unfortunately doesnt have enhanced CAN module. Only the CAN module. This is unfortunately the reason why you cant receive a message timestamp even if you check it in your receive block.

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Answer 2

Venkatesh Chilapur 2018-3-13

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You can create a counter and reset it when you get a CAN message (from the function call of the CAN block or an interrupt). If the counter reaches the timeout value before a CAN message is received, then we can trigger a specific subsystem.

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Marek Laszlo 2018-3-26

Thank You. I tried this and similar solutions but all failed on the function caller. The problem I could not solve and found other poeple asking for is how to reset the counter if you have only the function caller signal. The ports are imcompatible.

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