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Altera_Forum
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18 years ago

Quartus/FIR Filter/Avalon Streaming Interface/SOPC Builder

I have to build an FIR filter that is being used in a system that requires 2+ separate channels to be pumped through the same filter. I previously was using DSP Builder to build the FIR and I used an...
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Altera_Forum
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18 years ago

Hi dtietz

What you really need to do is build an Avalon master and/or slave interface for your device. If the data is relatively slow, you can just make the FIR a slave device, that the NIOS supplies the data one sample at a time, but usually, you want to have the FIR be a master device, which can grab data on it's one, from memory.

If you really don't need the CPU in the system, what I would recommend, is writing the re-use muxing in Verilog. This can mux the data streams, and depending on the speed of the data, keep everything running for you.

I believe, (Although I haven't used it) the fir generator, has the ability to mux 2 data paths though the same filter as well. (Again restricted by the speed of the data samples)

Pete