MATLAB: How to use Mask parameters in InitFcn

mask parametersimulink

I am using 2017a. I have a need to use a parameter from the mask of a block in the block property's InitFcn function. Is it possible? I have attached the model so you may see what I mean. Thank you.

Best Answer

You Can access the block parameters of masked subsystem using get_param and change the block parameter using set_param.

You can make these changes inside InitFcn function.

% To get the Block Parameter
Param= get_param([gcs,'/Subsystem'],'Tend');
% To set Block parameter
set_param([gcs,'/Subsystem'],'Tend','6');

I have attached the modified Simulink Model.

Related Solutions

MATLAB: How to pass the mask parameter to a goto block underneath and to the GotoTag parameter in Simulink 8.0 (R2012b)

With respect to the modifying GOTO tag names, using Mask Parameters, I am attaching a SLX file here.

SLX file : MathWorksTS_ExampleMaskParameter_for_Goto.slx which has two subsystems 'Subsystem' and 'Subsystem1'.

'Subsystem' demonstrates usage of 'set_param' along with a Dialog Callback of the Dialog Parameter for 'GOTO_NAME'. The callback is in 'MaskDialogCallback.m' script in the ZIP folder. The script changes the 'GotoTag' of the Goto block with the provided string value.

The 'MaskDialogCallback.m' script should have the following code:

blk = gcb;
GotoTagString = get_param(blk,'GOTO_NAME');
set_param([gcb '/Goto'],'GotoTag',GotoTagString)

Please note, usage of 'set_param' might not be the ideal scenario, because it might lead to possible conflicts and hence it is not recommended to use 'set_param' for blocks under the mask.

Another option is if you know of all possible 'Goto' blocks then can use a Switch Case in the Mask Dialog to select one of the Goto block. The 'Subsystem1' demonstrates this workflow. Edit the mask to understand the workflow. The different Goto blocks are inside the 'Switch Case Action Subsystem' blocks. This is a recommended workflow if you are aware of all available goto blocks.

MATLAB: Accessing data dictionary from Simulink model InitFcn callback

Simulink do not saves data dictionary parameters into base workspace.

To access Data Dictionary parameters you need to use APIs. Use code like below in InitFcn callback

dictObj = Simulink.data.dictionary.open('YourDD.sldd');
secObj = getSection(dictObj, 'YourSection Name');
enObjX = getEntry(secObj, 'x');
enObjY = getEntry(secObj, 'y');
temp_x = getValue(enObjX);
temp_y = getValue(enObjY);
% Your operation. Example: z = temp_x.Value + temp_y.Value;
close(dictObj);
clear dictObj secObj enObjX enObjY temp_x temp_y;

It is better to create a load script (m file) and call in InitFcn instead of writing the code in InitFcn.

Best Answer

Related Solutions

MATLAB: How to pass the mask parameter to a goto block underneath and to the GotoTag parameter in Simulink 8.0 (R2012b)

MATLAB: Accessing data dictionary from Simulink model InitFcn callback

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