Usage of CAN blocs on Arduino UNO & MKR CAN Shield

Question

Supun MORAKANDA GAMAGE 2022-5-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1725425-usage-of-can-blocs-on-arduino-uno-mkr-can-shield

回答： Githin George 2024-2-8

bug_txt.txt

Hello,

In my project i have to use CAN blocs to communicate between raspberry pi 3 & arduino uno.

I have some troubles by using the demo code here's the following result :

Here's the following error that i have (you can find attached to this post.

Thanks in advance for your help.

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Answer 1

Githin George 2024-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/1725425-usage-of-can-blocs-on-arduino-uno-mkr-can-shield#answer_1404821

Hello,

It is my understanding that you are trying to implement the example for CAN transmission with an Arduino UNO. I’m assuming that you are following the example given below to setup your hardware and configuration properties.

https://www.mathworks.com/help/releases/R2019b/supportpkg/arduino/ref/transmit-receive-data-can-blocks.html

Looking at the build log, it is apparent that the data memory in the Arduino is being overflowed as it exceeds 2KB, which is the limit for the Arduino UNO. If the hardware setup is indeed in line with the example, the probable cause would be the definition of the Block Parameter “Message ID”. According to the documentation for CAN transmit block, for the parameter “Message ID” use "hex2dec(' ')" to convert the entry if the value is entered as hexadecimal. In this case use "hex2dec(‘0x14’)" as normal usage may be the cause of the unexpected behavior.

https://www.mathworks.com/help/releases/R2019b/supportpkg/arduino/ref/cantransmit.html?s_tid=doc_ta#mw_40d465b5-5776-4a41-a562-16b0f0756660

You could also try the same example with a supported hardware board which offers more flexibility in terms of data storage.

I hope this helps.