FFT 8.0 for beginner

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!