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Altera_Forum
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16 years ago

How to check signal waveform.

I have this VHDL code within my architecture: architecture first of butterfly8 is signal butterfly8_r_Z1, butterfly8_r_Z2, butterfly8_r_Z3, butterfly8_r_Z4: std_logic_vector(31 downto 0); ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

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Thanks, Higor.

I am actually writing VHDL for 128 points FFT and I am using floating point (32 bits precision). So, I need 128*32 pins for inputs and 128*32 pins for outputs. I am sure none of the existing device supports so many pins. I believe there are many ways to solve it. Maybe Parellel to Serial converter. What if I am writing a test bench? Any comments and suggestions?

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I am afraid you are on the wrong path...

data processing can't be done that way. Your input need to be 32 bits(possibly 16 bit real, 16 bit imag) and so your output.

The fft points of 128 or 1024 ...etc are never meant to be entered all in parallel. The fft nees to wait until all points are ready then it starts processing to produce an output.