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Altera_Forum's avatar
Altera_Forum
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13 years ago

continuous averaging using VHDL

I have a question related to VHDL programming. I want to calculate the continuous average. My example code is: process (clk, reset) begin if (reset = '1') then state<=idle; out-v...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

The principle is that sum width must not overflow so you are flexible here and depends on nature of your signal.

for 100 samples you can't divide easily (but you may just compare sum with sum without division). if you use 128 samples then you discard 7 bits from sum to divide it by 128.

for 5 samples again you can't divide easily, make it 8 samples then discard 3 bits from sum