topic Re: RTC in TWR-Vybrid doesn't keep time in Vybrid Processors

RTC in TWR-Vybrid doesn't keep time

sandrobastos — Wed, 11 Dec 2013 13:01:03 GMT

Hi,

I'm working with TWR-VF65GS10 and IAR, using MQX.

My code sets a time and then I comment the code and start my program again (reset). When I read the RTC back, it has came back to 01-01-1970, 0h.

I already changed the J1 to position 2-3 (Vbat comes from battery) and, obviously, put the battery.

Could anyone share any solution? Thanks....

My code is as follow (taken from this forum):

void setTimeFromDate(uint_32 year, uint_32 month, uint_32 day, uint_32 hour,

uint_32 minute, uint_32 second, uint_32 millisec){

TIME_STRUCT MQX_time;

DATE_STRUCT DateStruct;

RTC_TIME_STRUCT RTC_time;

DateStruct.YEAR = (uint_16)year;

DateStruct.MONTH = (uint_16)month;

DateStruct.DAY = (uint_16)day;

DateStruct.HOUR = (uint_16)hour;

DateStruct.MINUTE = (uint_16)minute;

DateStruct.SECOND = (uint_16)second;

DateStruct.MILLISEC = (uint_16)millisec;

_time_from_date(&DateStruct, &MQX_time);//Convierte la fecha a tiempo MQX

_rtc_time_from_mqx_time (&MQX_time, &RTC_time);

_rtc_set_time (&RTC_time);

}

void getDateFromTime() {

TIME_STRUCT MQX_time;

DATE_STRUCT DateStruct;

RTC_TIME_STRUCT RTC_time;

_rtc_get_time (&RTC_time);

_rtc_time_to_mqx_time ( &RTC_time, &MQX_time);

_time_to_date(&MQX_time, &DateStruct );

}

@bruno_c@freescale.com

Re: RTC in TWR-Vybrid doesn't keep time

naoumgitnik — Wed, 11 Dec 2013 23:04:18 GMT

Dear Sandro,

It is caused by the known hardware issue (https://community.freescale.com/message/343277#343277) and the fact that there is a resistor connected in series with the battery.

With the current too high the voltage on the Vybrid VBAT rail appears to be too low to retain the RTC data, thus, to run such tests on your board, you will have to lower the resistor value.

The new Vybrid revision has this issue fixed so that the new board builds will not have such a problem.

Regards, Naoum Gitnik.

@bruno_c@freescale.com

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Thu, 12 Dec 2013 09:26:58 GMT

Hi Naoum,

I'll make the correction but I'm not sure that is the real problem. When I'm doing the tests, the power of the TWR is not disconnected, I just restart the program and the time is reset. It seems to me to be a software issue.

thank you and regards...

BrunoCastelucci

Re: RTC in TWR-Vybrid doesn't keep time

Nouchi — Thu, 12 Dec 2013 12:23:00 GMT

Hi Sandro,

Did you try to transfer systime to hardware clock :

hwclock --systohc

then read again

hwclock

Emmanuel

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Thu, 12 Dec 2013 16:43:26 GMT

Hi Emmanuel,

I'm sorry but I didn't understand:

hwclock --systohc

It's supposed to be put in my code? How? Is it a linker command?

Remember I'm using MQX.

thanks...

Re: RTC in TWR-Vybrid doesn't keep time

naoumgitnik — Thu, 12 Dec 2013 20:08:05 GMT

Dear Sandro,

I am just curious if your code works properly, i.e. the RTC time is stored with the J1 shunt staying all the time in the default (1-2) position...

Regards, Naoum Gitnik.

Bruno Castelucci

Re: RTC in TWR-Vybrid doesn't keep time

Nouchi — Fri, 13 Dec 2013 07:34:27 GMT

Hi Sandro,

Sorry, I didn't see you worked with MQX.....

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Fri, 13 Dec 2013 09:28:55 GMT

No problem Nouchi. Cheers...

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Fri, 13 Dec 2013 09:30:46 GMT

Hi Naoum,

No the time isn't kept even with 3.3V direct (J1 = 1-2). That's why I think it might be a sw issue.

Regards,

Re: RTC in TWR-Vybrid doesn't keep time

naoumgitnik — Fri, 13 Dec 2013 17:32:30 GMT

Dear Sandro,

If this piece of information were provided from the very beginning, a few days would be saved...

juangutierrez, may you comment on the topic-starter's code and/or compare it to what we have, please?

Thanks in advance, Naoum Gitnik.

Bruno Castelucci

Re: RTC in TWR-Vybrid doesn't keep time

karina_valencia — Wed, 18 Dec 2013 22:58:26 GMT

juangutierrez do you have an update on this case?

Re: RTC in TWR-Vybrid doesn't keep time

juangutierrez — Thu, 19 Dec 2013 00:05:14 GMT

Sorry, I have been busy with other issues. I have not had chance to check this one.

Re: RTC in TWR-Vybrid doesn't keep time

karina_valencia — Thu, 19 Dec 2013 14:16:36 GMT

Juan,

Please provide estimated due date to have an update.

Re: RTC in TWR-Vybrid doesn't keep time

juangutierrez — Thu, 19 Dec 2013 15:59:54 GMT

Well, I don't think I have a chance to check it this week.

And I'm out next week until January 1st.

I can start checking after the holidays.

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Thu, 19 Dec 2013 16:49:38 GMT

Hi Juan,

No problem, we'll be back at January 13.

Thank you

Re: RTC in TWR-Vybrid doesn't keep time

karina_valencia — Tue, 07 Jan 2014 22:54:10 GMT

juangutierrez please continue with the follow up.

Re: RTC in TWR-Vybrid doesn't keep time

rendy — Thu, 09 Jan 2014 11:14:59 GMT

I'll take it.

Re: RTC in TWR-Vybrid doesn't keep time

rendy — Tue, 14 Jan 2014 11:50:44 GMT

Hi Sandro,

this is a bug in the MQX RTC driver. It doesn't store the time to the correct (nonvolatile) place. The real time peripherial hardware is otherwise working correctly. Please consult Vybrid Security Reference Manual, you can request it here.

Rene

Re: RTC in TWR-Vybrid doesn't keep time

sandrobastos — Tue, 14 Jan 2014 12:01:11 GMT

Hi Rene,

I need you e-mail in order to fullfil the download form otherwise freescale doesn't allow me to make the download... ;-(

thanks

Freescale Salesperson/FAE Name:
FAE Email Address:

Re: RTC in TWR-Vybrid doesn't keep time

rendy — Tue, 14 Jan 2014 12:15:41 GMT

My email is: rene.kolarik@freescale.com

Please entry this to the first input box: Rene Kolarik (https://community.freescale.com/thread/316863)