hi alex, sorry - you can't adapt the 10Gbe port to a 1Gbe port as the CX4 and RJ45 signals are not electrically compatible.
there is, as you probably know, a 1Gbe port on the roach I, but it's not directly connected to the FPGA - the data from the FPGA must go through the CPU to the 1Gbe port, so it's a slow interface, meant for monitor and control. on roach II, there is a 1Gbe port directly connected to the FPGA, as well as another 1Gbe port on the CPU. best wishes, dan On Tue, Jul 24, 2012 at 7:06 PM, <[email protected]> wrote: > Is it possible to use the ROACH FPGA's 10gbe interface as a 1gbe one? > Ideally, one could get a bunch of CX4 to RJ45 adapters and have an array > of ROACHs communicate directly between their FPGAs with an ordinary 1gbe > switch for low bandwidth applications... > > -Alex Zahn > > > > >
