Error in HDL Workflow Advisor - Stateflow - Build Illegal Data Access ... 'Execute at Initialization' Must be Enabled

I am attempting to build an Encoder Counter Reader using Simulink, Stateflow to implement on a Zedboard using HDL Coder in Matlab 2014a. At Step 3.2 in the HDL Workflow Advisor I get the following error:

• Error: HDL code generation from Stateflow failed: Stateflow:Build Illegal data access or computation detected for the chart given that 'Execute At Initialization' must be enabled. See above errors more information. Stateflow HDL code generation failed for chart 'EncoderRead/Channel A Interrupt' (#42).

I ran 'hdlsetup EncoderRead' and I have "Execute at Initialization" checked in the Model Explorer for my state charts.

Anyone have any pointers on what I am doing wrong here? The Simulink Model is below.

Encoder Read Simulink Model

Answer 1

[David Walter]

So, adding a boolean enable port to my charts, with idle states triggered by the enable signal seemed to have fixed the error.

Answer 2

[Li Qian]

Hi, ich found a general Solution for this Problem. Wenn you combine a chart from Stateflow with HDL-Code, the "en" aktion of the first State in the State Machine is not allowed to receive the Value from the Simulinkmodell outside of the Chart. That means that for the initialization using "en" in the first State, for example: en: a=Parameter, the Parameter muss be defined inside of the chart, Wenn not, the error mentioned above comes up. :)

[Li Qian]

Sorry I found

Answer 3

[Li Qian]

Hi, I have the same Problem. Could you show me your Project?

Regards,

Qian

[Dave Walter]

Sorry, I don't have access to this project anymore. But I did post the solution for what worked in my case above.

Answer 4

[Li Qian]