181–188 of 188 posts
If you want the go under the nanosecond there is the White Rabbit [1][2] project. The CERN uses it to control the magnets in the loop of a particule accelator. It is also based on NTP, Ethernet and FPGA. [1]: http://www.ohwr.org/projects/white-rabbit [2]: https://en.wikipedia.org/wiki/White_Rabbit_Project
I cannot find any source files for the FPGA code in the repository (no .v .vhd .vhdl files and I can't see anything by looking around manually). The FPGA directory [1] contains some binaries and some documents relating to commercial code from a Swiss firm [2]. I've seen plenty of projects described as open source when the firmware is open source and the hardware is closed but this is the first time I've seen one wher…
I cannot find any source files for the FPGA code in the repository (no .v .vhd .vhdl files and I can't see anything by looking around manually). The FPGA directory [1] contains some binaries and some documents relating to commercial code from a Swiss firm [2]. I've seen plenty of projects described as open source when the firmware is open source and the hardware is closed but this is the first time I've seen one wher…
It's a particular module for the Xilinx Artix 7 XC7A100T, made by a Shanghai-based integrator. As an individual user, you could buy these on Aliexpress, from eBay resellers, or from Amazon resellers. Facebook presumably has an arrangement with the contract manufacturer that's not going to be possible for an individual developer ordering ones and twos to replicate. However, to modify the HDL, you'd need a $3,000 licen…
Earlier quoted context omitted.
That was my impression as well but now I’m puzzled about why. Since most smartphones have GPS builtin why not get time from GPS?
Mostly because 1) your phone is getting time from the tower anyways (they have to be closely sync'd) and 2) GPS doesn't always work very well -- especially indoors.
Earlier quoted context omitted.
Please excuse the language “invented”. We simply meant “came up with a form factor” of having the MAC+GNSS present via PCIe bus as a POSIX clock similar to a NIC with hardware timestamping. We are humble to all the awesome products that are out there and we just wanted to present an open source version of a simplified approach to allow others to build on it.
Isn't this a Symmetricom card? Being open source is the killer feature here. There are a number of companies that make PCIe timing cards, but they are all proprietary and go out of support way too quickly.
Oh cool, an open source Symmetricom card. These timing cards are low volume products so they have a bad habit of going out of support after a few years and then the kernel level drivers don't get updated and there is hardly any community. Having open hardware that multiple vendors can support makes them easier to get added to the mainline kernel.
> Now, as long as printing the PCB and soldering tiny components does not sound scary, anyone can build their own Time Card for a fraction of the cost of a regular time appliance. Doesn't sound scary, but not a lot of research labs and data centers are going to want to build their expansion cards from parts, even given free access to instructions. I understand if there isn't enough of a market for this to make it a v…
From https://github.com/opencomputeproject/Time-Appliance-Project... > Where can I get one? > […] we are currently working with several suppliers and will have their contact info soon available to allow you to puchase an out-of-the-box ready Time Card.
What are the pressure sensor and IMU for? You've open-sourced a dev-board version, I'm assuming you'll keep the production version private?