Why is the "createComponentAsModel" function generating a model with incorrect data types in MATLAB R2018b?

I am trying to use the "createComponentAsModel" function to generate an AUTOSAR MBD Model from my custom ARXML file.

Please run the below command in the command window of installed MATLAB R2019a version to get release specific documentation of the function:

>> web(fullfile(docroot, 'autosar/ref/arxml.importer.createcomponentasmodel.html'))

The issue that I encountered is that the generated model contains different datatype definitions compared to the datatypes I defined in the ARXML file

For example, if I were to define a "float32" type in the ARXML file, the generated model would have a "uint32" type instead.

Is this a bug with the function?

Please follow the below link to search for the required information regarding the current release:

https://www.mathworks.com/help/

Answer 1

[MathWorks Support Team]

According to the AUTOSAR specification for platform types, "float32", and "float" should follow IEEE754 encoding.

https://www.autosar.org/fileadmin/standards/R20-11/CP/AUTOSAR_SWS_PlatformTypes.pdf

The encoding type for "float32" has been set to "NONE" in your ARXML file which is why the generated model has an incorrect datatype.

<SW-BASE-TYPE UUID="BB616C701EE7">
<SHORT-NAME>float32</SHORT-NAME>
<CATEGORY>FIXED_LENGTH</CATEGORY>
<BASE-TYPE-SIZE>32</BASE-TYPE-SIZE>
<BASE-TYPE-ENCODING>NONE</BASE-TYPE-ENCODING>
<NATIVE-DECLARATION>float</NATIVE-DECLARATION>
</SW-BASE-TYPE>

The issue will be resolved once you set the "BASE_ENCODING_TYPE" to IEEE754 as shown below.

<SW-BASE-TYPE UUID="BB616C701EE7">
<SHORT-NAME>float32</SHORT-NAME>
<CATEGORY>FIXED_LENGTH</CATEGORY>
<BASE-TYPE-SIZE>32</BASE-TYPE-SIZE>
<BASE-TYPE-ENCODING>IEEE754</BASE-TYPE-ENCODING>
<NATIVE-DECLARATION>float</NATIVE-DECLARATION>
</SW-BASE-TYPE>