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From: | Mike Rosing |
Subject: | Re: [lwip-users] SNTP example? |
Date: | Tue, 2 May 2017 15:29:23 -0500 (CDT) |
Thanks Simon!
I did try wireshark, but did not see anything to my IP. So I looked at the address it was trying to use for the NTP server, and found it was pointing to my gateway (which is what the example did). I changed that to point to a real NTP server found on the NIST web site and then sntp_process was called. I did not know about lwip_stats, so that is a great help, I will check that.
I can at least now set my RTC when the program starts. The next test will be to see if it goes out once an hour.
Now I can put LwIP to work talking to other custom servers. I think that will be simpler, but if I run into problems I will be back with more questions.
Mike
On May 2, 2017 at 2:47 PM "address@hidden" <address@hidden> wrote:
Mike Rosing wrote:
The SNTP seems to initialize ok, but the routine sntp_process() is never called.
Have you checked (e.g. using wireshark) that SNTP requests are sent and
responses are received? If not, sntp_process() won't get called either.If the response is received, check "lwip_stats" to see if there are any
"err" counters going up. If not, try adding a breakpoint to udp_input()
when the response is received and see where it goes.Simon
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