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FIR by megafunction or write fir by myself?

Honored Contributor I


I'm new in VHDL, I'm intend to design a filtr typ FIR. I have used Megafunction in Quartus.  

But it supports only 37 taps for each fir. I need about twice taps of that.  

I'm thinking about connect 2 filtrs serial, or design one filtr by myself using Matlab to canculate coeficients and write it in vhdl. 

By your experiments, can you give me some advice, should I write it myself or using 2 megafunction filters. Or any another suggestion. 

Which of those is most optimal for speed, resource...:confused: :confused: :confused: 


Thank you!!!
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1 Reply
Honored Contributor I

both FIR Compilers support more than 37 coefficients