MATLAB: Am I not able to see calls to “arm_fir” in generated code when using ARM Cortex-M support packages for Embedded Coder and DSP System Toolbox

armcmsiscortex-mcrldspmatlab coder

I'm unable to observe any CMSIS code when generating code for the dsp.FIRFilter system object. Ihave the Embedded Coder support package for ARM Cortex-M Processors as well as the DSP System Toolbox support package for ARM Cortex-M Processors.

When I use the following example – https://www.mathworks.com/help/supportpkg/armcortexmdst/examples/verify-fir-filter-on-arm-cortex-m-processor-in-matlab.html, I observe calls to functions like "arm_fir_…". So I can confirm that the support package does indeed work, but when I try to generate code for my customer function, I don't see any calls to functions from the ARM (CMSIS) library.

How do I generate code that contains calls to "arm_fir_"?

Best Answer

In your code, please consider making the dsp.FIRFilter object persistent. If this object is not made persistent, MATLAB Coder optimizes out the variable and there will be no calls made to "arm_fir". Please also note that, as of MATLAB R2019a, the DSP System Toolbox support package for ARM Cortex-M Processors is no longer required to generate CMSIS code. It is sufficient to use the Embedded Coder support package for ARM Cortex-M Processors.

Related Solutions

MATLAB: Do I get build errors about missing headers (arm_math.h) when using CMSIS Code Replacement Library for ARM Cortex

There are two things to note about builds using CMSIS code replacement libraries (CRL):

1) CMSIS libraries only work with GNU toolchains, not with Visual Studio compilers. Ensure that the selected toolchain is "GNU Tools for ARM Embedded Processors" in the "Code Generation" area of your model's Configuration Parameters.

2) The root cause for the error message is that no Hardware Board was selected in the model. CMSIS CRL will work when you select any of the Hardware boards that we ship as part of ARM Cortex Support Packages.

CMSIS needs this information, for example which ARM architecture (M0, M3, ...M7) is used. The correct CMSIS library will be selected based on the selected architecture. This information is coming from the Hardware Board parameter. Set this parameter accordingly in the "Hardware Implementation" area of your model's Configuration Parameters.

If you are not using any of the hardware boards that we support as part of our support packages, you can follow the Target Creation workflow to create a target for your hardware as explained here: https://www.mathworks.com/help/supportpkg/armcortexm/target-sdk.html

In this way, you can create a target and add the necessary information such as architecture, library name etc.

MATLAB: STM32F4 Build Error “ARM CMSIS SIN COS”

So with the help of Mathworks support, I was able to resolve the "ARM CMSIS SIN COS" error.

Running the following code from the command prompt fixed the issue:

RTW.TargetRegistry.getInstance('reset');

After this, for those that are interested, I had to do some interesting configuration edits on the STM side of things to have my 2014a setup working in 2019a matlab. First, I followed the instructions here and replaced the STM32/script/customRoutineProcess.tlc with the one in this forum post.

https://community.st.com/s/question/0D50X00009XkgWlSAJ/many-problems-with-stm32mat

It also appears that in the change from 2018b to 2019a the "codeFormat" field is somehow not referenced correctly. This is referenced in the STM32/script/stm32_make_rtw_hook.m file. I figured this wasn't really a big deal, so I just commented line 202 out by adding a % sign. Essentially, it was this:

% Called after code generation is complete, and just prior to kicking

% off make process (assuming code generation only is not selected.)  All

% arguments are valid at this stage.

fprintf('\n### Code Format : %s\n',buildOpts.codeFormat);

And I changed it to this:

% Called after code generation is complete, and just prior to kicking
% off make process (assuming code generation only is not selected.)  All
% arguments are valid at this stage.
% fprintf('\n### Code Format : %s\n',buildOpts.codeFormat);

Best Answer

Related Solutions

MATLAB: Do I get build errors about missing headers (arm_math.h) when using CMSIS Code Replacement Library for ARM Cortex

MATLAB: STM32F4 Build Error “ARM CMSIS SIN COS”

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