who can support a example for fft ip core 7.2 simulation?

[Altera_Forum]

i am facing a boring problem that i can get right simulation waveform. signal of sink_ready was reset to zero automatically then there is no result after timing simulation.

[Altera_Forum]

i have already found the criticial point that there is a mistake at Figure 3–3 in the FFT MegaCore Function User Guide document.  

 the type of signal sink_ready is output !!!, so sink_ready have to be repalced by source_ready.