Stateflow with variable solver step time

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

Answer 1

[Binaya]

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:

• Configure Model and Generate Code: https://www.mathworks.com/help/rtw/ug/configuring-the-model-and-generating-code.html
• System Target File for Code Generation: https://in.mathworks.com/help/rtw/ref/systemtargetfile.html?searchHighlight=rsim.tlc&s_tid=srchtitle_support_results_7_rsim.tlc

I hope this helps.

Regards

Binaya

Answer 2

[Jonathan]

Hi Binaya,

With rsim, should we be able to acheive the main goal ? i.e to be able to call the step function async (not periodycaly) ?

Regards,