Issue for TI c2000 package in Matlab2017a?

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清刘 on 2 Jul 2019

Commented: 清刘on 2 Jul 2019

Accepted Answer: 马纳尔Chilapur

A simplest demo (led001_error.slx) is as follow:

The GPIO68 corresponds to a LED in my board, so, under the ideal situation, the LED should blink at frequency of 1Hz as the time step is 0.5s, .

However, the LED actually keeps off after the model is downloaded.

在加剧代码中，我找到了原因：在模型步骤函数（在LED001_ERROR.C中，如下），没有执行任何执行。

                         /* Model stepfucntion */
                        
                         voidled001_error_step(void)
                        
                         {
                        
                         /* (no output/update code required) */
                        
                         }

But, if I alter the parameter of `Default parameter behavior` in `Code Generation/Optimization` from "Inlined" to "tunable".

As a result, the model works fine (the LED blinks and the step function is as follow).

                         /* Model stepfucntion */
                        
                         voidled001_error_step(void)
                        
                         {
                        
                         /* (no output/update code required) */
                        
                         GpioDataRegs.GPCTOGGLE.bit.GPIO68 = (1.0 != 0);
                        
                         }

据我所知，“默认参数行为”参数仅更改模型中某些变量的属性，并且不应以这种方式影响代码生成和程序的执行。因此，这是TI支持软件包的错误，还是我错过万博1manbetx了一些东西？

Environments:

MATLAB2017A CCSV6

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Accepted Answer

马纳尔Chilapur on 2 Jul 2019

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//www.tianjin-qmedu.com/matlabcentral/answers/469838-issue-for-ti-c2000-package-in-matlab2017a#answer_381614

Hi 清刘 ,

Please can you specify sample time for constant block to -1 and try.

In that case the block inherits the model step time and the code will be generated in step function.

问候，

Venkatesh C

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清刘 on 2 Jul 2019

Thanks for your replay, Venkatesh C.

Your method works. The default sample time of the constant is `inf` and the model is back to normal after changing it to '-1'.

An additional question: This model also works fine in Matlab2019a, with the sample time being `inf` and default parameter behavior being `inlined`, is it the reason that there something inside Simulink changes?

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