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Altera_Forum
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10 years ago

Comparison between old value and new value

Hi All, Its a very simple question but I am unable to do that. Below is my code. I want to store signal data_o_new to signal data_o_old and then compare these signals with each other and do inc...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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thanks tricky... I dont understand what is initial value of output_ref?? So how it can be compared

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Sorry, I should have initialised it - you could do it like this:

signal output_ref : unsigned(Nbits-1 downto 0) := (others => '0'); --or whatever value you want

or with a reset.