Error when connecting output of SR Flipflop to Byte Pack of desktoptargetslib

Question

Krisha Devulapalli 2022-4-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1691065-error-when-connecting-output-of-sr-flipflop-to-byte-pack-of-desktoptargetslib

编辑： Narvik 2023-12-29

I am trying to use Byte Pack block in Simulink to pack data for UDP Transmission. However, when the input of Byte Pack is the output Q of an SR Flipflop, I see below compile errors. Not sure how to solve this.

Error reported by S-function 'any2byte' in 'Signal_Interface/Byte Packing10/Byte Pack': backward propagation not supported

Component: Simulink | Category: Model error

Error in port widths or dimensions. 'Input Port 1' of 'Signal_Interface/Byte Packing10/Demux' is a one dimensional vector with 8 elements.

Component: Simulink | Category: Model error

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Piotr Kolodziej 2022-9-6

Have you resolved the issue? I have the same problem.

Piotr Kolodziej 2022-9-7

Seems Reshape "solves" the issue.

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Answer 1

Narvik 2023-12-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1691065-error-when-connecting-output-of-sr-flipflop-to-byte-pack-of-desktoptargetslib#answer_1379356

编辑：Narvik 2023-12-29

Hi,

As per my understanding, while trying to compile a Simulink model, you are receiving the following errors:

Backward propagation not supported
Error in port widths or dimensions

These errors occur when the signal attributes (data type, dimension, etc.) are backpropagated from the input port of the Byte Pack block to the source block. Refer to the following MATLAB answer for more information on the issues and resolution steps:

https://www.mathworks.com/matlabcentral/answers/1972374-bytepack-backward-propagation-not-supported?s_tid=ta_ans_results

Hope this helps!