Achim Gratz via devel writes: > I've ordered a bunch of RS232 converters and USB UART today along wth > another rasPi 3B and Tinkerboard, so I should be able to tell how much > better things get exactly when you use line disciplining on a virtual or > real serial port on these and also a PC soon. Let's hope the FTDI chips > are not fake on those USB UART so I get a full virtual serial with all > modem control lines.
The FTDI boards are here and they work as advertised. I have to solder in the optional header strips in to get at the modem control lines reliably, but just using a press-fit (sort-of) works OK for now. PPS line discipline via USB virtual serial works and produces the expected ~1ms offsets due to the USB poll interval. It should be possible to remove that shift by doing a loopback measurement via RTS/CTS eventually. Jitter is roughly on par with the local stratum-1 over network. Regards, Achim. -- +<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+ SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2: http://Synth.Stromeko.net/Downloads.html#WaldorfSDada _______________________________________________ devel mailing list devel@ntpsec.org http://lists.ntpsec.org/mailman/listinfo/devel
