Embedded NTP client/NTP interleaved mode, part 4
Part 3 [https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-3/] ended
with an unexplained 3us offset, this post will reduce that.
Verifying PTP clock sync
I wanted to measure the NTP client's PTP clock sync externally. The PTP
peripheral has the option to output a PPS that I can compare