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Honored ContributorNCO v 11.1 not working
I 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.8 Replies
Altera_ForumDid You initialize Your signal values?
- Altera_Forum--- Quote Start --- Did You initialize Your signal values? --- Quote End --- Yes, they should. I use to initialize "ALT_NCO_tb.vhd" which be automaticly generate with NCO core. Or do You mean somethin different? I attach TB (ALT_NCO_tb.vhd.txt)
- Altera_Forum
initialize all signals, e.g.:
signal reset_n : std_logic := '0'; signal sin_val : std_logic_vector (MPR-1 downto 0) := (others => '0'); - Altera_Forum--- Quote Start --- initialize all signals, e.g.:
--- Quote End --- I paste this lines into my TB. It initialize zero value but NCO still not working. Initialize in attach.signal reset_n : std_logic := '0'; signal sin_val : std_logic_vector (MPR-1 downto 0) := (others => '0'); - Altera_Forum
You have to do this for ALL signals. But anyway, I believe the problem is somewhere in other place.
- Altera_Forum
yes, initialization do only the "0" from the "U", but not from NCO sinusoidal wave
- Altera_Forum
There may be other problems, too, but setting reset_n to '0' will keep the NCO in reset. You should only pulse it low.
- Altera_Forum
We 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
