How to implement a digital control transfer function on an FPGA using HDL coder?

I have developed a controller for a digital control problem. I want to implement the controller obtained, which is a digital transfer function, on an FPGA. I tried 'import from work space' in the fdatool, but I get the error "HDL generation for the filter structure xxx is not supported"

Could someone please explain the procedure to be followed to get the HDL code of one's custom filter? there seem to be many tutorials to get the HDL code of filters designed using FDATOOL

Answer 1

[Kiran Kintali]

Have you considered realizemdl function to generate a Simulink and using HDL Coder to generate code from the Simulink model?

realizemdl

Simulink subsystem block for filter

https://www.mathworks.com/help/dsp/ref/dsp.allpassfilter.realizemdl.html

d = fdesign.lowpass('N,F3dB',4,0.25);
filterobject = design(d,'butter',Systemobject=true)
new_system('LPFilter');
realizemdl(filterobject);