1PPS output over USB

Q&A forum1PPS output over USB
magwe asked 10 months ago
magwe replied 10 months ago

I need to sync a system clock to GPS time and I am not getting the /dev/pps0 device generated by gpsd to work on ubuntu. Is the SimpleRTK2b 1.1 not sending a 1pps over USB-UART? Do I have to pull this signal from a pin on the board itself?

regards,
Magnus

clive1 replied 10 months ago

Pretty sure uBlox don’t support any kind of 1PPS signalling on DCD or other pin status bits for their CDC/ACM (VCP) implementation.
And I don’t think ArduSimple/EPS provide anything on the FTDI USB interface either

clive1 replied 10 months ago

A workable approach might be to get a FTDI USB breakout board that exposes DCD, DSR, or CTS, and use one of those inputs for 1PPS, and RX/TX for the ZED-F9P UART1, powering IOREF with 3.3V, and the board with 5V

1 Answers
magwe answered 10 months ago

Hi Clive and thanks for the reply!
The system I need to have time synced has GPIO pins, so I guess that would be my first attempt.
I was really hoping I wouldn’t have to solder and rebuild kernels but… *sigh*
Thanks again!
/Magnus