FFT 8.0 for beginner

[Altera_Forum]

Hello everybody, 

 I am totally new at FPGA-programming (Cyclone III Starter) and especially in understanding the Altera-FFT-core. I read the user guide and half of the FFT-threads, but my simulation does not work :(  At first I tried a 64-point burst FFT to see how everything works, later I want to use a 4096-point FFT to transform a signal from an ADC-board.  I generated a random input signal (only real, imag and exp = 0), I set the sink_sop, sink_eop, source_ready and reset_n as shown in the FFT user guide. But there is no source_sop the whole time?! I can imagine that the source_real is always 0, because of the missing source_sop...  But why does not assert the source_sop? EDIT: The source_valid shuold assert before the source_sop can assert, OK! But why doesn't the source_valid assert? :confused:  I think it could be a mistake of beginners :rolleyes:  Thanks for your help!

[Altera_Forum]

Ok, I think I didn't simulate long enough. 

 Now I got results, which make me happier :D  Could somebody watch to my screenshot and perhaps tell me, why the sop, eop get managed wrong?!

[Altera_Forum]

it probably has to do with the source_error codes that are popping up. 

 check how many packets are making it to the FFT since your sink_ready pin is asserted then deasserted, etc.

[Altera_Forum]

How do you easily enter some meaningful signal to the FFT for simulation?