MATLAB: How to prevent Real-Time Workshop 7.2 (R2008b) from generating no-op code for the model

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When I generate code for my model using Real-Time Workshop 7.2 (R2008b), no-op code is generated (due to dead-code elimination). I would like to preserve the output signal from my model in the generated code.

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In order to prevent Real-Time Workshop from generating no-op code in R2008b, you can uncheck the 'Block Reduction' option in the Optimization pane in the Configuration Parameters dialog window (Click on Simulink -> Configuration Parameters).

However, please note that turning off block reduction for a whole design could be expensive in terms of RAM/ROM and operation speed. To preserve just one signal in the generated code, you can instead declare the signal as a test point. You can do this via the Signal Properties dialog window for the signal (Right-click on the signal then go to Signal Properties) .

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MATLAB: How to generate code for masked subsystem such that I can see the its parameters initialized, when using Real Time Workshop 7.6 (R2010b)

You can do following steps to see the subsystem block parameters initialization in your generated code when using Real Time workshop 7.6 (R2010b).

1. When using the masked subsystem block in a simulink model and using a signal name under the mask, if you would like to include the signal name in the generated code perform the following steps:

 a. Right click the signal name under the mask, select 'Signal Properties'.
 b. In the new window, select the Real Time Workshop tab and in the 'Package' option select Simulink. You can select the 'Storage Class' type to SimulinkGlobal.
 c. Save these changes

2. In the top level model window, select the Configuration Parameters. Here you need to uncheck the 'Block Reduction' and 'Inline Parameters' options in the Optimization option.

3. In order to have a single code file generated after the 'Generate Code' step, you need to make changes in the 'Code Placement' settings in the Real Time Workshop option in the 'Configuration Parameters'. In the settings, select the 'compact' option in the 'Code Packaging' option.

4. Build your model after this step.

5. In the generated code, you can see the signal name declared as a variable which is set to a default value in the model initialize block. This value updates when a function call is made such that the variable gets updated.

I have attached a model example 'masking_sample_example.mdl' to this email with all the above settings enabled. You can generate code for this model by using the Ctrl+B shortcut and see the generated code.

MATLAB: What this error means …and what i shd do to sort it out???

It looks like you don't have videoinput function in your installation. You need to have Image Acquisition Toolbox to have that function. You can do

>> ver

to verify what you have.

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MATLAB: How to generate code for masked subsystem such that I can see the its parameters initialized, when using Real Time Workshop 7.6 (R2010b)

MATLAB: What this error means …and what i shd do to sort it out???

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