General • Millisecond support in RP2040 RTC ?

Hi,

I am creating the NTP server synchronized 'zero error clock' using Raspberry Pi Pico W and Micropython now.

I noticed that:

1) Micropython library 'ntptime.py' sets millisecond field to zero in ntptime.settime() as follows:

--- ntptime.py ---

def settime():
t = time()
import machine

tm = utime.gmtime(t)
machine.RTC().datetime((tm[0], tm[1], tm[2], tm[6] + 1, tm[3], tm[4], tm[5], 0)) # last field is millisecond

2) RP2040 datasheet says 'RTC has no millisecond filed'.

Hence,

Q1) Does RP2040 RTC support millisecond accuracy ?

Q2) How can I treat 'millisecond accuracy' for 'zero error clock' fully synchronized with the accurate NTP time (without error within 1 sec) ?

Thanks,

Statistics: Posted by koby — Mon Apr 01, 2024 2:06 am — Replies 0 — Views 20

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