how to convert autosar parameters to constant

I need to convert calibration parameters to constant, or vice versa.

Here is one example of parameter which I want to convert to constant.

what is the stable way to convert calibration to constant, which cant be affected by any of code generation configuration in matlab?

CalParm_test = AUTOSAR.Parameter;

CalParm_test.Value = 50;

CalParm_test.CoderInfo.StorageClass = 'Custom';

CalParm_test.CoderInfo.Alias = '';

CalParm_test.CoderInfo.Alignment = -1;

CalParm_test.CoderInfo.CustomStorageClass = 'InternalCalPrm';

CalParm_test.CoderInfo.CustomAttributes.PerInstanceBehavior = 'Parameter shared by all instances of the Software Component';

CalParm_test.SwCalibrationAccess = 'ReadWrite';

CalParm_test.Description = '';

CalParm_test.DataType = 'single';

CalParm_test.Min = -20000;

CalParm_test.Max = 20000;

CalParm_test.DocUnits = '-';

When I change it as 'Auto', parameter will be generated as inline constant value without variable.

What is the difference to confidure StorageClass as 'Custom' and 'Auto'?

Answer 1

[Ethan Wu]

When you mapping AUTOSAR ,You can try map CalParm_test to ConstantMemory,maybe you will get what you want.And actualluy,when you mapping AUTOSAR and set CalParm_test to Auto,the calibration will be its value in the generated code(just like picture). And when I set CalParm_test to SharedParameter,sometimes I will also find parameter will be generated as inline constant value without variable.But sometimes I can find its value in the Data files( if it can generate this file) ,so I think maybe there is something wrong when you mapping AUTOSAR(I'm not sure).In fact ,if you use MATLAB2020a,the parameter will be valued when defined. And I also want to know what's the defference when I set CalParm_test.CoderInfo.CustomStorageClass = 'InternalCalPrm' or 'CalPrm'? I don't find any difference while I read the generated code.But when I read MATLAB document,I think there should be some difference.......

[Ethan Wu]

If you use matlab2020a,you can search PerInstanceParameter,and you will get difference between shared and Per-Instance. And we don't have to set parameter's StorageClass, we just

Configure AUTOSAR Shared or Per-Instance Parameters