Hi Nimish, Is there a chance that your toolflow is not set up with the "new" pin mapping, mentioned in the bottom of the GPIO page. If you're on the old mapping then I guess the SMAs will map to GPIOs 4 and 5. Might be worth checking to see if your pulse which should be on 7 is coming out on 4. I for one have had problems with this before, even though my toolflow was supposedly up to date. (Things got particularly confusing when I started using two different compile machines each with a different map. Good fun had by all)
Cheers, Jack On 23 December 2011 21:43, Nimish Sane <nimishs...@gmail.com> wrote: > Hi all, > > We want to use one of the SMA interfaces on the ROACH board as an output > from the Roach board. In particular, we are using the SMA connector J10 > (corresponding to pin 7 of GPIO A) to output a pulse periodically. In the > design, I have a boolean signal connected to a *gpio *block. I have > configured the *gpio* blocks (one for the actual signal and one for the > direction) as described here: > https://casper.berkeley.edu/wiki/GPIO and > https://casper.berkeley.edu/wiki/ROACH_FPGA_Interfaces > > We, however, do not see any signal on the SMA connection. We can confirm > that the Roach design is working as expected and generating this signal. > Are there any other things to take care of while using the SMA connectors? > > Thanks, > > Nimish >
