Qsys not ready for general use yet

Hello,

I also share your frustrations with Qsys.

It works ok when designs are fairly simple. As soon as you start adding complex cores like 2'nd DDR3 memory controller, multiple transceiver channels, PCI Express, multiple masters, Qsys hierarchies, etc., things simply break.

I've been working a lot with Qsys since Quartus 10.x. Some problems get fixed, some don't, and new problems get introduced.

My approach is to keep the Qsys simple. For complex cores, just use MegaWizard flow, and add those cores outside. Then connect them to Qsys using Avalon Bridge.

Thanks,

Evgeni