There are also some nice cypresses semiconductor parts that are similar and have a really nice dev environment. Basically a core surrounded by programmable logic. Code in C ore close to it.
> On Aug 11, 2016, at 07:06, Bob Camp <kb...@n1k.org> wrote: > > Hi > > To your earlier point, there are a number of fairly low cost boards with > Zynq’s on them. > They aren’t into the $5 range, but they are not that much more than one of > the Beagle > boards. > > Bob > > >> On Aug 10, 2016, at 11:18 PM, Chris Albertson <albertson.ch...@gmail.com> >> wrote: >> >> Thanks for pointing out the Zynq. Wow you get a dual core ARM and an >> FPGA all in one package. It seems overkill for a GPSDO but not the >> type you are making as you can transferring the time out of the GPSDO >> using PTP. >> >> The Zyng looks to the the perfect platform for low-cost SDR. >> >> On Wed, Aug 10, 2016 at 2:30 PM, Joakim Langlet >> <joakim.lang...@seaview.se> wrote: >>> Dear time-nuts, >>> >>> My name is Joakim Langlet (SM0OET) and I just recently joined this list. As >>> Brooks Shera was mentioned, I remembered that I was referenced in the >>> footnotes of the original article in the QST - July 1998. It feels almost >>> historical now. Brooks bought a few OCXOs from me. >>> >>> I am currently working on a GPS stabilized OCXO. >>> It is based on a Xilinx Zynq FPGA as the processor and counter arrangement. >>> The hardware is starting to take shape. The control voltage of a 20 MHz OCXO >>> is set by a DAC coupling from which I hope to set the voltage in very small >>> steps. >>> The OCXO has a CMOS level output which is converted to LVDS and is wired to >>> the FPGA board. The Xilinx Zynq take a minimum frequency of 19 MHz as input >>> to the PLL of the clock tile. My intention is to scale up the clock to some >>> where a bit over 200 MHz to be fed to the counters.The 1 PPS from the GPS >>> receiver is also fed into the FPGA to gate the counters. >>> >>> The reason for my choice of processor is that I want to run Linux on it in >>> order benefit from the large software base. Time distribution using PTPv2 >>> and a nice web-application to visualize and control what is going on inside >>> is part of the intended concept. >>> >>> I still have a long way to the finish line but I will try to present some >>> results as I proceed. >>> >>> I am following what is written on this list with great interest. It feels >>> good to know that I am not the only nut .... >>> >>> BR/ >>> Joakim >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> >> >> -- >> >> Chris Albertson >> Redondo Beach, California >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.