Hi James, Yes, Espressif is doing a good work adding support to it.
I hope in the future others silicon vendors start to contribute as well (hello ST, Microchip, Renesas, ...) Very nice James, I think PTP will be very useful. Please let me know if you want some help with tests, etc. BR, Alan On 1/30/23, James Dougherty <jafr...@gmail.com> wrote: > wow, it is really well supported! > OK I will start looking at a PTP server implementation and work on client > later… > >> On Jan 27, 2023, at 11:36 AM, James Dougherty <jafr...@gmail.com> wrote: >> >> Thanks, I will try it this weekend on one of my boards…. >> >>> On Jan 27, 2023, at 11:12 AM, Alan C. Assis <acas...@gmail.com> wrote: >>> >>> Yes, it is supported: serial and network (ethernet and WiFi). >>> >>>>> On 1/27/23, James Dougherty <jafr...@gmail.com> wrote: >>>> Outstanding! >>>> >>>> Serial and Network… >>>> >>>> Thank you >>>> >>>>>> On Jan 27, 2023, at 10:01 AM, Alan C. Assis <acas...@gmail.com> >>>>>> wrote: >>>>> >>>>> Hi James, >>>>> >>>>> ESP32 is supported, which features do you need? >>>>> >>>>> BR, >>>>> >>>>> Alan >>>>> >>>>>> On 1/27/23, James Dougherty <jafr...@gmail.com> wrote: >>>>>> I haven’t looked at it yet, but I am working on ESP32; is WROOM >>>>>> supported >>>>>> in master or just the S3/C3? >>>>>> >>>>>> >>>>>> On Fri, Jan 27, 2023 at 4:23 AM Robert Alexa >>>>>> <robertalexa2...@gmail.com> >>>>>> wrote: >>>>>> >>>>>>> Hi all, >>>>>>> >>>>>>> What's the current status of this? I'm also interested in adding PTP >>>>>>> support to NuttX, especially on ESP32 if that's possible - I haven't >>>>>>> done >>>>>>> any research yet regarding the hardware capabilities of ESP32 in >>>>>>> this >>>>>>> matter. >>>>>>> >>>>>>> As a first step I was thinking of adding support for the PTP daemon, >>>>>>> as >>>>>>> Alan suggested. >>>>>>> >>>>>>> Regards >>>>>>> Robert >>>>>>> >>>>>>>> On Fri, 9 Dec 2022 at 07:39, James Dougherty <jafr...@gmail.com> >>>>>>>> wrote: >>>>>>> >>>>>>>> Thanks Arie, >>>>>>>> >>>>>>>> Yes, very true, it depends on your application! >>>>>>>> >>>>>>>> My statement about what makes a good clock is very subjective. This >>>>>>>> all depends on your application, your measurement and of course >>>>>>>> your >>>>>>>> jitter. >>>>>>>> >>>>>>>> - For Wireless AV, a 10ms gps clock is fine. >>>>>>>> - For Wireless Earbuds, a 10us clock is required with 1us phase max >>>>>>> drift. >>>>>>>> - For Photon measurements, you're in the nano/pico domain... >>>>>>>> >>>>>>>> Accuracy costs money, how well do you need to measure? >>>>>>>> >>>>>>>> So the message is to know your application! Your application will >>>>>>>> have >>>>>>>> varying time requirements. The infrastructure and machinery for >>>>>>>> relaying and exchanging time is all PTP provides as a tool. >>>>>>>> >>>>>>>> The 802.1AS spec specifies how to manage that clock across multiple >>>>>>>> time domains. >>>>>>>> >>>>>>>> Related, know your latencies! >>>>>>>> >>>>>>>> https://gist.github.com/jboner/2841832 >>>>>>>> >>>>>>>> Best regards >>>>>>>> -James >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Thu, Dec 8, 2022 at 3:37 AM Arie de Muijnck <nu...@ademu.com> >>>>>>>> wrote: >>>>>>>> >>>>>>>>> Beware of that 1PPS signal. A few years ago I bought several GPS >>>>>>> modules >>>>>>>>> and compared the signals. Some differ by exactly 100ns (within >>>>>>>>> 2ns, >>>>>>>>> the >>>>>>>>> accuracy of my scope) from others, and that is not the width of >>>>>>>>> the >>>>>>>> pulse, >>>>>>>>> that is much wider, I compared only the edge that are comes close >>>>>>>>> to >>>>>>> the >>>>>>>>> others. Maybe I will test again, have a 1 GHz LeCroy now, should >>>>>>>>> be >>>>>>> able >>>>>>>> to >>>>>>>>> do jitter measurements too. >>>>>>>>> Oh, and yes, before someone asks: all antenna and scope cables >>>>>>>>> were >>>>>>>>> the >>>>>>>>> same length... ;-) >>>>>>>>> >>>>>>>>> Arie >>>>>>>>> >>>>>>>>> >>>>>>>>> On 2022-12-08 06:33, James Dougherty wrote: >>>>>>>>>> Related to this, I have a GPS receiver generating PPS interrupts >>>>>>>>>> on >>>>>>>>> SAME70. It would be a perfect GMC - Atomic clock sync! >>>>>>>>>> I will look at this when I get a chance. I have a lot of upstream >>>>>>>>> contributions from HW platforms I have done over the last 5 years >>>>>>>>> or >>>>>>>>> so >>>>>>>>> with myself and others ... I need some time to >>>>>>>>>> patch master on upstream -- something for 2023 and now that NuttX >>>>>>>>>> has >>>>>>>>> graduated! Yay! >>>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>> >
