Use DS3231 RTC with BBB

[dwv...@yahoo.com]

Hi,

I'm connecting a DS3231 RTC from AdaFruit but am following the instructions for the 1307:

https://learn.adafruit.com/adding-a-real-time-clock-to-beaglebone-black?view=all

Should I follow these connections except connect the Vcc to the BBB P9-3 VDD_3V3B instead of P9-5 VCC_5V ?

Thanks,

David

[Robert Nelson]

Which adafruit module?

Regards,

--
Robert Nelson
https://rcn-ee.com/

[David Viel]

Adafruit DS3231 Precision RTC Breakout

Adafruit DS3231 Precision RTC Breakout The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal"....

Thanks,

David

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[Robert Nelson]

On Wed, Oct 17, 2018 at 12:58 PM 'David Viel' via BeagleBoard <beagl...@googlegroups.com> wrote:

Adafruit DS3231 Precision RTC Breakout

Adafruit DS3231 Precision RTC Breakout The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal"....

Okay, that one is safe to be plugged into v3.3

Then setup a U-Boot overlay like:

https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-I2C2-RTC-DS1338.dts

But with the correct port, and device name..

Then you'll get it bootup as rtc0 and everything date/ntp/etc will just work, without any other special scripts..

Regards,