Using HDL coder for Matlab Function block of Simulink

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Tunç Arslan
Tunç Arslan le 14 Déc 2018
Commenté : Tunç Arslan le 17 Jan 2019
Hello,
On the big picture, I am trying to implement a filter with around 150-200 taps but my filter has some special features thus I don't want to use Simulink's HDL optimized FIR filter. To do this I've written a code that puts simple Simulink blocks into a subsystem, however since a Simulink canvas has finite size and the amount of blocks I can use are naturally limited by the Simulink itself, when there are more taps to the filter (say 600 taps) it gives an error. Also yes, I did as much modularization as I could by gathering constantly used blocks within subsystems as well.
Since I have this problem I thought using Matlab Function block of Simulink would be a better approach. But creating a delay line is a bit problematic for huge amounts of delay. I am trying to use for loop for signal pipelining in the delay line but it either doesn't work as intended, i.e. it doesn't delay the signal right amount, or I am forced to write all the signal pipeline with my hand but then this makes filters with huge number of taps not so practical.
Is there a better tutorial about using HDL coder through Matlab for example? That shows how to do bigger delay lines faster and more modular using loops.

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Kiran Kintali
Kiran Kintali le 15 Déc 2018
kiran.kintali@mathworks.com
Can you share sample abstract MATLAB code and testbench on what you are describing here?
type "eml_hdl_design_patterns" to see some MATLAB function block examples.
Please check mlhdlc_tutorial_corner_detection.m and mlhdlc_tutorial_corner_detection_tb.m
There are lot of such demos in <matlabroot>\toolbox\hdlcoder\hdlcoderdemos\matlabhdlcoderdemos for your review.
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Tunç Arslan
Tunç Arslan le 17 Jan 2019
Thank you very much, this helped quite a lot.

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