en:odroidwrtc [ODROID Wiki]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== RTC on the Odroid W ======
This page details how to setup the RTC Odroid W on the Raspbian “wheezy” image from http://www.raspberrypi.org/downloads
----
===== Preparations =====
  * Odroid W
  * uSD-Card  => over 2GB or eMMC Module
  * RTC Backup battery 
===== Configuration =====
  - Building the kernel\\ Please refer to [[en:odroidwkernelcompilation | Kernel compilation for odroid-w]]
  - With your Odroid W insert a RTC Backup Battery into the battery connector which is BT1.
  - Enable I2C by running:<code>sudo vi /etc/modprobe.d/raspi-blacklist.conf</code> Find the I2C line where the i2c is black listed <code>blacklist i2c-bcm2708</code> Comment it out by replacing it with the line below <code>#blacklist i2c-bcm2708</code>
  - Now you have the RTC Odroid W running with the current date and time the next step is to make it load   when the Odroid W boots.\\ Edit the modules file: <code> sudo vi /etc/modules </code> Add rtc-rc5t619 at the end of the file and save it.
  - Next you want to add the RTC Odroid W at boot by editing /etc/rc.local.\\ sudo vi /etc/rc.local\\ Add the following at the bottom of the page above exit 0. <code> echo rc5t619 0x32 > /sys/class/i2c-adapter/i2c-0/new_device 
 hwclock -s </code> Save the file and reboot your Odroid W. <code>sudo reboot</code> If everything worked correctly the RTC Odroid W should be initialised on boot and the current date and time will be loaded into Linux.
  - You can check the current time on the RTC Odroid W with: <code> sudo hwclock -r</code> If this is the first time you have run the RTC Odroid W it will display a date of July 17th 2014.
  - If the Odroid W is connected to the internet the correct date and time should be set automatically otherwise you can set the current date and time using: <code>sudo date -s "17 JUL 2014 18:00:00" </code> You can check the current linux date with the command (date).
  - To save the date onto the RTC Odroid W use the following command: <code> sudo hwclock -w </code> Verify the date has been saved onto the RTC Odroid W with: <code>sudo hwclock -r</code>