Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-10 Thread Andrew Rodland
Bill, Since I accidentally let the smoke out of my Due, and I just *happen* to have an UDOO Dual sitting around, I decided to play with it while I wait for a replacement board to come around. UDOO ships an ARM version of Arduino IDE 1.5.4, which is a little bit too old to compile my code

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-10 Thread Bill Dailey
Cool. I have an udoo quad but am using it as a small mysql server for a medical project that is ongoing. I could just try another sd card. My biggest problem is time. I have about 5 simultaneous official work project, a new company that I am coding on an embedded jetson tk1 (computer vision)

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-10 Thread Bill Dailey
I apologize. I didn't mean for that last post to go through the list. Sent from my iPad On Sep 10, 2014, at 7:48 PM, Andrew Rodland and...@cleverdomain.org wrote: Bill, Since I accidentally let the smoke out of my Due, and I just *happen* to have an UDOO Dual sitting around, I decided

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-06 Thread Andrew Rodland
Yes, the source is at http://github.com/arodland/Due-GPS-NTP-Server . It should be able to run just fine on the Due part of an Udoo, but you'll have to come up with a different arrangement for the Ethernet. One way would be to use chip-to-chip SPI to make the i.MX side of the Udoo act

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-06 Thread Bill Dailey
Will add it to my list of projects. Will touch bases when I get close. Sent from my iPad On Sep 6, 2014, at 10:18 AM, Andrew Rodland and...@cleverdomain.org wrote: Yes, the source is at http://github.com/arodland/Due-GPS-NTP-Server . It should be able to run just fine on the Due part of an

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-06 Thread Andrew Rodland
On Fri, Sep 5, 2014 at 3:07 PM, Andrew Rodland and...@cleverdomain.org wrote: 1. Should I try using the analog EFC to zero out the amount of correction I ask the X72's DDS for? Could reduce jitter in the timebase, could just add noise. I suppose I can test this one easily enough. Update on

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Andrew Rodland
After some productive work, and some frustrating weeks spent fighting weird flakiness and needlessly replacing components, only to find that the problems went away after I reseated my main power connector, IT WORKS! Here's where I am now: * Main board: Arduino Due (ATSAM3X ARM Cortex-M3 CPU @

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Ryan Stasel
Andrew, My only comment, since I’m working on something very similar myself (just a GPS frequency standard that will be able to have the OCXO shut off, and just output 1PPS for an NTP system), would be to not output any signal/pps/ntp timing unless you have a solid GPS lock, since before that,

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Chris Albertson
On Fri, Sep 5, 2014 at 2:28 PM, Ryan Stasel rsta...@uoregon.edu wrote: Cool idea though. I’ve found very few (none) instances of people actually running NTP servers from arduino hardware… most use Raspi or the like. Note the Arduino Due has an ARM based CPU inside. It's not jet the old AVR

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Ryan Stasel
On Sep 5, 2014, at 17:34 , Chris Albertson albertson.ch...@gmail.com wrote: On Fri, Sep 5, 2014 at 2:28 PM, Ryan Stasel rsta...@uoregon.edu wrote: Cool idea though. I’ve found very few (none) instances of people actually running NTP servers from arduino hardware… most use Raspi or the

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Andrew Rodland
Well, my *previous* clock was on the Mega 2560 (an AVR chip, although admittedly one with more code space and IO than usual). I made some mention of it back in 2012. It had 500ns timer granularity and no Rb (just DPLL of a timer running off of the onboard crystal) but it still managed well enough

Re: [time-nuts] Update on my Arduino GPSDO / NTP server - going atomic

2014-09-05 Thread Bill Dailey
I was wondering if a board like the udoo would help your ntp performance. I have one and would be willing to try this configuration. Have you posted your source? I think I got confused as to who was doing this. I don't have a rubidium but I have a 6T on a breakout and a couple of very good