Hi Casper, While we're talking weird FFT problems...
I have experienced an interesting problem with the FFT libraries when compiling for ROACH2, that I'm hoping someone might be able to explain. I have tried multiple versions of the libraries, and various branches (latest CASPER, SKA-SA, SMA), on Ubuntu, CentOS, RedHat and Windows, all using Xilinx 14.7 and Matlab 2012b, but the error stays the same: the FFT (various sizes/number of inputs/wb/biplex_2x/biplex_4x) simulates fine, but when I compile I get zeros for some of the outputs. After various experiments, I found that if I black box the FFT, and then include it in the design, everything works, so I'm presuming the problem is something in the system generator options when run by the tool flow. Can anyone help me out with an explanation for why this might occur? Thanks, Jonathon
