Stateflow with variable solver step time

Question

Jonathan 2023-9-15

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https://ww2.mathworks.cn/matlabcentral/answers/2021651-stateflow-with-variable-solver-step-time

回答： Jonathan 2023-9-28

Hi,

We would like to use stateflow in our next product. We would like to know if it's possible to generate C code that can be run on a variable time frame ?

We are not 100% sure that the step function will be called at the periodic rate (like fixed step require).

for example, if a delay is put into the chart, the generated code is assuming that the step function is called at a certain rate (invrement only a vraible and compare the delay value). I think we need to have a step function that need to take a delta time or a way of computing the last call time and the new call time and compute de delta.

Hope I'm clear !!

Regards,

Jonathan

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Answer 1

Binaya 2023-9-26

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https://ww2.mathworks.cn/matlabcentral/answers/2021651-stateflow-with-variable-solver-step-time#answer_1318317

Hi Jonathan,

I understand that you want to generate C code for your model using the variable-step solver. For Simulink and Embedded coder, the “grt.tlc”and “ert.tlc”target file needs a fixed step solver with discrete time step as the solver configuration. This is done to avoid complex codes and highercomputation power needed for implementing the C code with variable step solver in the hardware.

If you want to use variable step solver for generating the C code, please use ”rsim.tlc”as the system target file in code generation configuration parameters. For details please explore the below documentation: