Hello, I am very new to ptplinux. I am exploring using it as a time sync solution for an embedded system of systems my company is working on. Think of the hardware configuration as a custom backplane with a mix of custom and Commercial Off-the-Shelf (COTS) Plug-In Card(s). Each has a NIC and they will be connected via ethernet. There will be no access to the outside internet. There will be a GPS micro transceiver that will communicate with the outside world. I know that PTP has hardware requirements. For this conversation assume the hardware has the correct time stamping support. This system is likely to be rebooted daily (multiple times). We are considering a local NTP server but are concerned with convergence time between the GPS transceiver and the NTP server. We have a requirement for convergence accuracy within 1 second within 30 seconds of being up. Question 1. Can we configure a ptplinux grandmaster to use our GPS Transceiver as its time source? (limited documentation I've found seems to indicate it's possible) Question 2. If yes, would the convergence time between GPS and grandmaster to be almost instantaneous? Question 3. Can someone point me to documentation that shows me how to configure a PTP grandmaster to talk to a GPS transceiver device? Any insights would be appreciated! -Andrew
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