Honored ContributorIs there a better way to generate a generic priority encoder without IF/ELSEIF? I need the parameterize my encoder (before synthesis), without recoding manually every time. I have manually coded up a fixed priority encoder, and clearly IF/ELSEIF is less optimal than using CASE statement. But I haven't been able to keep it generic without using IF/ELSEIF. It needs to be minimal logic layers.
Honored ContributorI couldn't find it in my altera_mf_components.vhd file, but I instantiated it anyway and it seems to work. Maybe it's been moved to another file?
I did find a website here, but again couldn't find it in my own file: http://subversion.assembla.com/svn/cpu-lab3/altera_mf_components.vhd Just search for, altpriority_encoderHonored Contributorcomponent altpriority_encoder
generic (
lsb_priority : string := "NO";
pipeline : natural := 0;
width : natural;
widthad : natural;
lpm_hint : string := "UNUSED";
lpm_type : string := "altpriority_encoder"
);
port(
aclr : in std_logic := '0';
clk_en : in std_logic := '1';
clock : in std_logic := '0';
data : in std_logic_vector(width-1 downto 0);
q : out std_logic_vector(widthad-1 downto 0);
zero : out std_logic
);
end component;I've been looking in another directory \quartus\eda\sim_lib
That is because according to this link, http://www.altera.com/support/examples/modelsim/simulation-manual-howto.html that is where it tells you where to compile from in modelsim project. I'm in Quartus 11.0SP1 and if you search in that directory it's missing, but I do see it in the other directory. Anyway, I'm currently in a Stratix V GS - D8.Honored ContributorIs this function not supported in ModelSim?? When I compile the altera_mf, I don't see it in the library. Any thoughts?
Honored ContributorHonored ContributorHonored ContributorAny MegaFunction should have an associated model. The priority encoder is simple enough to generate my own behavioral model, but I shouldn't have to if it's an Altera IP. I'm also not simulating just the encoder by itself, it's of course a part of a much larger system model, and it will be used many times all with different input parameters. I don't really want to get involved in the gate level stuff until I get a functional model working, it just slows down the work flow. Thanks.
