MATLABsolutions Logo
Tobis_stelzer asked . 2021-09-04

Found unsupported type in switch expression; switch expression must be of discrete type

Hello,
 
I use a Matlab Function block as state machine in my Simulink module. Everything works, except the RTL Code generation in the HDL Workflow Advisor. At this point I get the following error:
Found unsupported type in switch expression; switch expression must be of discrete type, Function 'MNIST_CNN/MAXPOOL_BANK_20/CONTROL/MATLAB Function' (#1650.355.365), line 13, column 9.
 
My Matlab Code looks like this:
 
function [hStart,hEnd,valid,reset,enable] = maxpool_fsm(hStart_in,hEnd_in,valid_in)
%states:
ready = 0;
vector = 1;
matrix = 2;
wait_for_next_line=3;
% using persistent keyword to model state registers in hardware
persistent curr_state;
if isempty(curr_state)
    curr_state = ready;   
end
% switch to new state based on the value state register
switch (curr_state)
    case ready,        
        if (hStart_in==true && valid_in==true)
            curr_state=vector;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=true;
        else
            curr_state=ready;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=false;
        end
        
    case vector,        
        if (valid_in == true && hEnd_in==true)
            curr_state=wait_for_next_line;
            valid=true;
            reset=false;
            enable=true;
            hEnd=true;
            hStart=false;
        elseif (valid_in == true)
            curr_state=matrix;
            valid=true;
            reset=false;
            enable=true;
            hEnd=false;
            hStart=false;
        else
            curr_state=vector;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=false;
        end
        
    case matrix,       
        if (hEnd_in==true)
            curr_state=wait_for_next_line;
            valid = false;
            reset = false;
            enable = false;
            hEnd=true;
            hStart=false;
        elseif (valid_in==true)
            curr_state=vector;
            valid = false;
            reset = true;
            enable = true;
            hEnd=false;
            hStart=false;
        else
            curr_state=matrix;
            valid=false;
            reset=false;
            enable=false;
            hEnd=false;
            hStart=false;
        end
        
   
    case wait_for_next_line,
        if (hEnd_in==true)
            curr_state=ready;
            valid = false;
            reset=false;
            enable = false;
            hEnd=false;
            hStart=false;
        else
            curr_state=wait_for_next_line;
            valid = false;
            reset=false;
            enable = false;
            hEnd=false;
            hStart=false;
        end
    otherwise,
        valid = false;
        reset=false;
        enable = false;
        hEnd=false;
        hStart=false;
        
end
During compilation and simulation everything works. I have no clue, where the error is. In the Model Advisor the following error appeas:
 
Failed The model contains constructs that are unsupported for HDL code generation.
 
Error using hdlcoder.pirctx/invokeBackEnd
 
The model contains constructs that are unsupported for HDL code generation.
 
Error in slhdlcoder.HDLCoder/makehdl
 
Error in slhdlcoder.HDLCoder/makehdlturnkey
 
Error in downstream.DownstreamIntegrationDriver/runIPCoreCodeGen
 
Error in generateIPCore
 
Error in Simulink.ModelAdvisor/executeCheckCallbackFct
 
Error in Simulink.ModelAdvisor/run
 
Error in Simulink.ModelAdvisor/runCheck
 
Error in ModelAdvisor.Node/runTaskAdvisor
 
Error in ModelAdvisor.Node.runtohere>runToBreakpoint
 
Error in ModelAdvisor.Node.runtohere
 

simulink , hdl coder , switch , matlab function , state machine

Expert Answer

Prashant Kumar answered . 2024-05-06 13:07:51

I solved the issue by not declaring the state variable as persistent, but instead using a delay outside the matlab function block:

 

function [hStart,hEnd,valid,reset,enable,curr_state_out] = maxpool_fsm(curr_state_in,hStart_in,hEnd_in,valid_in)
%states:
ready = uint8(0);
vctr = uint8(1);
mtrx = uint8(2);
wait_for_next_line=uint8(3);
% using persistent keyword to model state registers in hardware
%persistent curr_state;
curr_state_out=uint8(0);
if isempty(curr_state_out)
    curr_state_out = ready;   
end
% switch to new state based on the value state register
switch(curr_state_in)
    case ready,        
        if (hStart_in==true && valid_in==true)
            curr_state_out=vctr;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=true;
        else
            curr_state_out=ready;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=false;
        end
        
    case vctr,        
        if (valid_in == true && hEnd_in==true)
            curr_state_out=wait_for_next_line;
            valid=true;
            reset=false;
            enable=true;
            hEnd=true;
            hStart=false;
        elseif (valid_in == true)
            curr_state_out=mtrx;
            valid=true;
            reset=false;
            enable=true;
            hEnd=false;
            hStart=false;
        else
            curr_state_out=vctr;
            valid=false;
            reset=true;
            enable=true;
            hEnd=false;
            hStart=false;
        end
        
    case mtrx,       
        if (hEnd_in==true)
            curr_state_out=wait_for_next_line;
            valid = false;
            reset = false;
            enable = false;
            hEnd=true;
            hStart=false;
        elseif (valid_in==true)
            curr_state_out=vctr;
            valid = false;
            reset = true;
            enable = true;
            hEnd=false;
            hStart=false;
        else
            curr_state_out=mtrx;
            valid=false;
            reset=false;
            enable=false;
            hEnd=false;
            hStart=false;
        end
        
   
    case wait_for_next_line,
        if (hEnd_in==true)
            curr_state_out=ready;
            valid = false;
            reset=false;
            enable = false;
            hEnd=false;
            hStart=false;
        else
            curr_state_out=wait_for_next_line;
            valid = false;
            reset=false;
            enable = false;
            hEnd=false;
            hStart=false;
        end
    otherwise,
        valid = false;
        reset=false;
        enable = false;
        hEnd=false;
        hStart=false;
        
end


Not satisfied with the answer ?? ASK NOW

MOST VIEWED QUESTIONS

Recent Matlab Projects

Classification of Covid and Non-Covid Lungs CT-Scan using Deep Learning with MATLAB

Matlab simulation on Wind Energy system

Related Questions

Frequently Asked Questions

MATLAB offers tools for real-time AI applications, including Simulink for modeling and simulation. It can be used for developing algorithms and control systems for autonomous vehicles, robots, and other real-time AI systems.

MATLAB Online™ provides access to MATLAB® from your web browser. With MATLAB Online, your files are stored on MATLAB Drive™ and are available wherever you go. MATLAB Drive Connector synchronizes your files between your computers and MATLAB Online, providing offline access and eliminating the need to manually upload or download files. You can also run your files from the convenience of your smartphone or tablet by connecting to MathWorks® Cloud through the MATLAB Mobile™ app.

Yes, MATLAB provides tools and frameworks for deep learning, including the Deep Learning Toolbox. You can use MATLAB for tasks like building and training neural networks, image classification, and natural language processing.

MATLAB and Python are both popular choices for AI development. MATLAB is known for its ease of use in mathematical computations and its extensive toolbox for AI and machine learning. Python, on the other hand, has a vast ecosystem of libraries like TensorFlow and PyTorch. The choice depends on your preferences and project requirements.

You can find support, discussion forums, and a community of MATLAB users on the MATLAB website, Matlansolutions forums, and other AI-related online communities. Remember that MATLAB's capabilities in AI and machine learning continue to evolve, so staying updated with the latest features and resources is essential for effective AI development using MATLAB.

Without any hesitation the answer to this question is NO. The service we offer is 100% legal, legitimate and won't make you a cheater. Read and discover exactly what an essay writing service is and how when used correctly, is a valuable teaching aid and no more akin to cheating than a tutor's 'model essay' or the many published essay guides available from your local book shop. You should use the work as a reference and should not hand over the exact copy of it.



Step By Step MATLAB Programming





Let's Do Python Programming




Optimization Techniques of Power System with Matlab Codes


Matlabsolutions.com provides guaranteed satisfaction with a commitment to complete the work within time. Combined with our meticulous work ethics and extensive domain experience, We are the ideal partner for all your homework/assignment needs. We pledge to provide 24*7 support to dissolve all your academic doubts. We are composed of 300+ esteemed Matlab and other experts who have been empanelled after extensive research and quality check.

Matlabsolutions.com provides undivided attention to each Matlab assignment order with a methodical approach to solution. Our network span is not restricted to US, UK and Australia rather extends to countries like Singapore, Canada and UAE. Our Matlab assignment help services include Image Processing Assignments, Electrical Engineering Assignments, Matlab homework help, Matlab Research Paper help, Matlab Simulink help. Get your work done at the best price in industry.

Get Instant 20% Off on Your Assignment

MATLAB SOLUTIONS


Let's discuss about any of your MATLAB Project. You need not worry with your Matlab Project, when we are here.

        

Quick Links


  Matlab Assignment Help
  Matlab Simulation Help
  Quantum Computing In Matlab
  Python Assignment Help
  MATLAB Exam Help
  Python Exam Help
  Maths Exam Help
  UAV Simulation

Links


  About Us
  Pay Now
  Blogs
  E-Books
  Answers
  Privacy Policy
  Careers
  Sitemap

Contact Us


   info@matlabsolutions.com
   +91-8299862833
   5th Floor,MSX Tower-2,Gr. Noida,India

     

Matlab Assignment Help by Countries

  Australia    UK    UAE    Singapore    Canada 
  New Zealand    Malaysia    USA    India    South Africa 
  Ireland    Saudi Arab    Qatar    Kuwait    Hongkong 


  
MATLAB Solutions
Rated 4.9/5 based on 5256 reviews

Copyright 2016-2023 www.matlabsolutions.com - All Rights Reserved.

Disclaimer : Any type of help and guidance service given by us is just for reference purpose. We never ask any of our clients to submit our solution guide as it is, anywhere.