Ahh, another possibility. I tried reset and clear pins thinking it
might need a hardware knock, but didn't think of software. I am
reading the data sheet now...
--- In Eddie Dawydiuk <> wrote:
>
> Hello,
>
> > I purchased a TS-7300 without the onboard RTC. I realized that I
> > really wanted one, so I purchased (a direct replacement, DS12887A) the
> > recommended M48T86PC1 module (TS-7300 Manual) and installed it. My
> > soldering skills aren't the best but are usually adequate. I noticed
> > in the schematic (after I installed the RTC) that the part is slightly
> > different there, a DS1687.
> >
> > I now get errors trying to access the RTC, "Timed out waiting for time
> > change." so I know there is something wrong. I did a search and saw
> > one other thread about this error but no resolution to it.
> >
> > The other thread asked for this, I include it in case it is helpful.
> > :root# cat /proc/driver/rtc
> > rtc_time : 55:110:55
> > rtc_date : 2055-55-110
> > rtc_epoch : 1900
> > alarm : **:**:55
> > DST_enable : yes
> > BCD : yes
> > 24hr : yes
> > square_wave : no
> > alarm_IRQ : no
> > update_IRQ : no
> > periodic_IRQ : no
> > periodic_freq : 0
> > batt_status : okay
> > :root#
> >
> >
> > I'm guessing I have one of the following problems, and hope the group
> > can help me pin it down.
> >
> > 1. I can't solder as good as I thought I could.
> > 2. I read the wrong document first and should have ordered the DS1687
> > 3. I have the driver for the add on pc104 RTC in my kernel (stock
> > SDCard), not the on board RTC.
> > 4. I need to modify the driver, and the fix is...
> > 5. I need to install an older driver, I can get it...
>
> If I remember correctly there is a special software knock that needs to
> be done to enable the battery on the RTC. Once the battery has started
> you can use the hwclock command to read/write the RTC date/time. The
> software knock is documented in the RTC datasheet.
>
> --
> Best Regards,
> ________________________________________________________________
> Eddie Dawydiuk, Technologic Systems | voice: (480) 837-5200
> 16610 East Laser Drive Suite 10 | fax: (480) 837-5300
> Fountain Hills, AZ 85268 | web: www.embeddedARM.com
>
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