MATLAB: How to read a value of S function popup in C code

s function popup in c codesimulinksimulink coder

I have masked a S function in which popup menu(ex: CAN1,CAN2,CAN3) is added. i need to get the selected index in C code.

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Just like Inputs and Outputs there are S-function APIs to access the parameters.

Please check

S-function Parameters

ssGetSFcnParam

ssSetNumSFcnParams

ssGetSFcnParamDataType

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For C s-function you can use ssGetSFcnParam() function to access the parameter entered in S-functions dialog box.

See

>> doc ssGetSFcnParam

For other functions related to s-function dialog box see

http://www.mathworks.in/help/toolbox/simulink/sfg/f9-5492.html#brhno1x

MATLAB: How to define some initialization commands in a s-function block in Simulink depending on a declarated variable from the Matlab command window

S-functions can include parameter inputs. There are examples of this for Level 2 MATLAB S-function, (msfcndemo_limintm) and C-MEX S-functions, (see sfundemos).

In a Level 2 MATLAB S-function, during "setup" set the number of dialog parameters:

 block.NumDialogPrms = 3;

Anywhere you need to reference a parameter (for example) inside "InitConditions" you can access it through the block object:

 block.ContStates.Data = block.DialogPrm(3).Data;

The parameters are passed into the block through the S-function block parameters, separated by commas.

For C-MEX S-functions, use ssSetNumSfcnParams in mdlInitializeSizes to set the number of parameters and ssGetSfcnParam to get a pointer to an mxArray anywhere you need to use it. C-MEX S-functions also need to do some parameter checking, so it can get a lot more complicated. See the SFCNDEMOS for examples.

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