Model Error: "cannot be defined to be a periodic function-call block because it has an asynchronous rate."

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Jonathan Lee 2013-4-5

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https://ww2.mathworks.cn/matlabcentral/answers/70044-model-error-cannot-be-defined-to-be-a-periodic-function-call-block-because-it-has-an-asynchronous

Hello Everyone,

I'm using Embedded Coder for a motor control appliation, and I'm running to this error message:

The triggered subsystem "cannot be defined to be a periodic function-call block because it has an asynchronous rate."

I get this error for the triggered subsystem that I'm using in my model. This subsystem is triggered by a hardware interrupt block that uses the ADCINT interrupt to call the subsystem. The subsystem contains code for read resolver registers, and I want this code to run right when the ADC posts the EOC interrupt, which I assumed is called ADCINT (CPU:1, PIE: 6 for TI's F28335).

Now, I've seen other posts on this topic, and the usual response is 'you didn't set the trigger block's sample time type to be triggered!' Well, I have that selected, and I still get this error, so I'm at a loss for what is wrong here.

Does anyone know how to go about solving this problem?

Thanks!

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Jonathan Lee 2013-4-5

I think I might have the answer: any blocks inside the triggered subsystem must have inherited sample times. I had an s-fn block with a previous sample time, and this error above was being thrown because of that.

I got this info from the Help file's Embedded Coder section titled: 'Asynchronous Interrupt Processing'

Maybe this info will help someone else out there...