K60DN512VLL10 based custom board. "Strange problem with RTC"...

chandrasekarkan — Mon, 18 Nov 2013 12:04:45 GMT

Hello there
My setup: i). MCU used : K60DN512VLL10 ii). Development Env : Keil uVision iii). Debugger : pEMultilink Universal

NOTE: My project is up and working fine on the board but we are encountering a strange problem with RTC.

In the user config I have enabled "BSPCFG_ENABLE_RTCDEV", in the hardware, we have VBAT in place and a 32kHz clock source in place.

Code snippet:

void setTime()

{

time_rtc.YEAR = 2013;

time_rtc.MONTH = 10;

time_rtc.DAY = 30;

time_rtc.HOUR = 20;

time_rtc.MINUTE = 6;

time_rtc.SECOND = 0;

time_rtc.MILLISEC = 0;

_rtc_set_time_mqxd(&time_rtc);

_time_from_date (&time_rtc, &time_mqx);

_time_set( &time_mqx);

_rtc_sync_with_mqx(FALSE);

}

void ReadTime()

{

_rtc_sync_with_mqx (FALSE);

_time_get (&time_mqx);

_time_to_date (&time_mqx, &time_rtc);

printf ("\nCurrent Time : %02d.%02d.%4d %02d:%02d:%02d \n", time_rtc.DAY, time_rtc.MONTH, time_rtc.YEAR,

time_rtc.HOUR, time_rtc.MINUTE, time_rtc.SECOND);

}

I use above code to set time(30-10-2013 20:06:00), the time is getting set. Now I comment off the above code and flash it again so that time is not set every time i reset the HW.

Then when I power OFF and ON the HW (no matter how long I power off), when I read time only 2 secs had been incremented(30-10-2013 20:06:02).

What could be the problem? Please give me any reference or workaround...

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K60DN512VLL10 based custom board. "Strange problem with RTC"...