Honored ContributorI have Quartus v11.1 Build 216 and generate NCO by his Wizard, generating include Simulation Model and Netlist. Then i try simulate this in Altera ModelSim and NCO not working. I use original TB generated by wizard and NCOout make only "U" I expected sine wave, not U. Where I made mistake?
Thanks for any help.
Honored ContributorDid You initialize Your signal values?
Honored ContributorHonored Contributorinitialize all signals, e.g.:
signal reset_n : std_logic := '0';
signal sin_val : std_logic_vector (MPR-1 downto 0) := (others => '0');
signal reset_n : std_logic := '0';
signal sin_val : std_logic_vector (MPR-1 downto 0) := (others => '0');
You have to do this for ALL signals. But anyway, I believe the problem is somewhere in other place.
Honored Contributoryes, initialization do only the "0" from the "U", but not from NCO sinusoidal wave
Honored ContributorThere may be other problems, too, but setting reset_n to '0' will keep the NCO in reset. You should only pulse it low.
Honored ContributorWe have right, the problem was some other. I forgot attach source file generated from BDF in NativeLink settings.
I overlooked ModelSim's Warning: (vsim-3473), that is already described here. thx for help
