Reply To: GENERATION OF RANDOM BYTES USING RANDOM PACKAGE ONLY
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Hi Nagella
To debug your code start by reading your code out loud. Do at least 2 iterations of your process.
What we see is that you are calling InitSeed before generating each data value.
Why is this a problem? Verification uses pseudo random. Each seed always produces the same sequence of values. For verification pseudo random is required so your tests are repeatable or stable. When you fix a bug, you need the same sequencing (test case) that caused the failure to run to verify the fix.
You need a loop so your InitSeed only runs once.
If you want to infinitely generate data use something like the following:
process
variable RV:RandomPType;
variable b:std_logic_vector( 7downto 0);
begin
RV.Initseed(RV’instance_name);
loop
wait until reset=’1? and rising_edge(clk);
b:=RV.RandSlv(0,255,8);
uat_data<=b;
end loop ;
end process;
Jim