topic System time drifting in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208064#M12149 <HTML><HEAD></HEAD><BODY><P>I have just noticed that the system date/time drifts badly.</P><P>-2.5% to be precise. The rtc time (running from the 24MHz crystal) is good, but the system time running internally runs slow.</P><P>Losing 15 seconds every 10 minutes is not good when you are dispalying a clock to the user! I have just checked it on the EVK and it does the same.</P><P>Has anyone else noticed this? And/or found a fix for it?</P></BODY></HTML> Fri, 03 Feb 2012 16:10:50 GMT hbucknell 2012-02-03T16:10:50Z System time drifting https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208064#M12149 <HTML><HEAD></HEAD><BODY><P>I have just noticed that the system date/time drifts badly.</P><P>-2.5% to be precise. The rtc time (running from the 24MHz crystal) is good, but the system time running internally runs slow.</P><P>Losing 15 seconds every 10 minutes is not good when you are dispalying a clock to the user! I have just checked it on the EVK and it does the same.</P><P>Has anyone else noticed this? And/or found a fix for it?</P></BODY></HTML> Fri, 03 Feb 2012 16:10:50 GMT https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208064#M12149 hbucknell 2012-02-03T16:10:50Z Re: System time drifting https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208065#M12150 <HTML><HEAD></HEAD><BODY><P>The clock rate defined in arch/arm/plat-mxs/include/mach/timex.h for CLOCK_TICK_RATE did not match with the actual clock rate supplied.</P><P>I changed it to 32000 and the time is now no longer drifting.</P><P>This is connected to the Persistent register setting which does affect the clocking sources and frequencies.</P></BODY></HTML> Mon, 06 Feb 2012 16:29:54 GMT https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208065#M12150 hbucknell 2012-02-06T16:29:54Z Re: System time drifting https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208066#M12151 <HTML><HEAD></HEAD><BODY><P>Thank you for sharing this with us Humphrey :-)</P></BODY></HTML> Mon, 13 Feb 2012 23:19:25 GMT https://community.nxp.com/t5/i-MX-Processors/System-time-drifting/m-p/208066#M12151 ChrisWood 2012-02-13T23:19:25Z