NTP function

jboavida · Joined: 12 Feb 2005 Posts: 94 Location: Portugal

Hi,
I'm using the NTP function provided by Micheal (aka Six1) from this post.

http://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=11141

I can get the current time from the NTP servers. I had try 3 or 4 different and all work ok.

Well almost Smile

I can get sync time correctly at first time (after power up).

Then if I sync again after 2 hours I get the same time as before (does not update).

Example:

Power on

Get NTP -> 09:05:21 -> Correct

After 2 hours:

Get NTP -> 09:05:21 -> incorrect -> same as last sync

Power off and on again

Get NTP -> 11:05:21 -> Correct

What i'm doing wrong?

Tks

Joaquim

jboavida · Joined: 12 Feb 2005 Posts: 94 Location: Portugal

Got it. In the test code "M128_Protocols_Test.bas" file there was a missing "Enable Interrupts".
The NTP function "Check_Time" compares the "Local _time" with "Ntp_request_time".
"Local _time" var is increased by one in a timer interrupt every second. Since interrupts were not enabled, the timer event never fired, so the var was never increased.
So, same time forever...

Code is ok...

Joaquim