Using HDL coder for Matlab Function block of Simulink

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.

Answer 1

[Kiran Kintali]

[e-mail]

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.

[Tunç Arslan]

Thank you very much, this helped quite a lot.