The 16-bit FIR filter module implements FIR Filter using DMAC instructions that 
effectively executes 2 filter taps in a cycle. This module can support up to 
255  order FIR filter.
Now my question is: can we obtain the filter coefficient whatever we want, without the help of
ezfir_matlab module? 
Because in my projedt I want the filter can varies due to different signals.
Fixed filters can not reach my goal.
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