Thanks Wes! Jonathon is using the new ADC16x250-8 that is not able to provide a sync input since it uses ALL differential pairs of the ZDOK for clocks and data. I guess we'll be adding it to the ROACH2 GPIO block.
Thanks again for the pointers, Dave On Jan 29, 2013, at 11:55 AM, Wesley New wrote: > Hi Jonathon, > > The easiest way to do this is through and ADC. If you arent using an ADC on > the board then you will need to make some tweaks to the tools. We dont > support this at the moment but it shouldnt be hard to add it. > > You could implement this in a couple of ways: > > It could be done in the the roach_infrastructure block, you will have to put > it thought a differential buffer and provide the output to the rest of the > system. You can see how it was done with the aux_clks on roach1. > > Or you could do it in the gpio block similar to the way the aux_clks are > exposed as GPIOs on roach1. > > I am pretty busy this week, but will be available next week to help out if > you need. > > Regards > > Wes > > > > On Tue, Jan 29, 2013 at 6:38 PM, Jonathon Kocz <jk...@cfa.harvard.edu> wrote: > Hi All, > > We are attempting to bring in a PPS signal on the ROACH2 J10 SMA connector. > > Does this still come in as with the ROACH using the GPIO block? Is there a > page or document somewhere that describes how to bring this signal in? (GPIO > bit map/other, similar to > https://casper.berkeley.edu/wiki/ROACH_FPGA_Interfaces ?) > > Many thanks, > Jonathon >
