RTC on chipKIT

Created Tue, 14 Jun 2011 19:15:23 +0000 by PapyEt

PapyEt

Tue, 14 Jun 2011 19:15:23 +0000

is the board ready for using the RTC? if the main power is down what about date time data?

Trev

Wed, 15 Jun 2011 10:34:16 +0000

Which "board"? Uno32 or Max32?

I see there's a spot on the Uno32 (X2) board for the clock crystal, but it's shipped unpopulated though the caps have been populated.

KM6VV

Wed, 15 Jun 2011 17:00:20 +0000

Is that X2? and what are the specs?

Thanks!

Alan KM6VV

Trev

Thu, 16 Jun 2011 05:26:07 +0000

Yes, it is X2. The schematic shows it as a "CFS206-32.768KDZF-UB", but I'd wager your normal run of the mill 32.768 kHz cylindrical clock crystal should do the trick.

gadjet

Fri, 17 Jun 2011 12:35:00 +0000

I cant see a seperate backup power input though!

PapyEt

Tue, 21 Jun 2011 16:50:03 +0000

For my application I need a RTC on a uno32 based hardware; I have to choose beetween external or internal solution

On the Web we can find arduino software solutions for external RTC as DS1302 or DS1307, it's easy to wire a supercap to avoid loosing the datetime in case of power down or even in case of software upgrade.

For the internal solution I need to add a crystal on the uno board, add external hardware to provide safety power during power down and add software to manage power saving modes on the chip, I dont know if software modules for internal RTC are available for MPIDE, unfortunately I am not able to provide them now (but I will be glad to do that!)

It will be fine to provide librairies for using the facilities of the PIC32 that are not available on standard arduino boards.