UPS Pico - HAT konformes USV Modul

<1> Download the latest Raspbian “wheezy” image and burn to your SD Card following the instructions on http://elinux.org/RPi_Easy_SD_Card_Setup


<2> If you are using Raspian Linux 3.18 or later you need to go into the raspberry pi config utility and enable I2C.  pi@raspberrypi ~ $   sudo raspi-config 


<3>  Setting the Timezone 


 Select 4 Internationalisation Options and then  I2 - Change Timezone .


<4> Once you have logged into your Raspberry Pi from the command line, run the following command to install i2c-tools:
     pi@raspberrypi ~ $   sudo apt-get install python-smbus
                                           sudo apt-get install i2c-tools




<5> Enable I2C and SPI protocols. I2C and SPI protocols are turned off in the wheezy distro by default, so you will need to enable them by editing the file /etc/modprobe.d/raspi-blacklist.conf :
   pi@raspberrypi ~ $   sudo nano /etc/modprobe.d/raspi-blacklist.conf




In the file you will see two lines, you need to disable the blacklisting of these by adding a # character before each line: 
   #blacklist spi-bcm2708 
 #blacklist i2c-bcm2708 




Save your changes and exit the nano editor.


<6> Set the Raspberry Pi to start I2C automatically at boot by editing /etc/modules :
         pi@raspberrypi ~ $   sudo nano /etc/modules




 Use your cursor keys to move to the last line and add a new line and then add:
        i2c-dev


Save your changes by pressing Ctrl-x then Y.


<7> To avoid having to run the I2C tools at root add the ‘pi’ user to the I2C group:
     pi@raspberrypi ~ $   sudo adduser pi i2c




<8> Next reboot the Raspberry Pi:
     pi@raspberrypi ~ $   sudo reboot






 Select 8 Advanced Options and then  A7 I2C - Enable/Disable automatic loading. A prompt will appear asking Would you like the ARM I2C interface to be enabled?, select Yes, exit the utility and reboot your raspberry pi.




<8> Follow the instructions on how to  install and configure I2C on Raspbian Linux. 


<9> Once you have installed I2C check that the RTC Pi has been detected using: 
   pi@raspberrypi ~ $   sudo i2cdetect -y 1


<10> Enable I2C by running: 
    pi@raspberrypi ~ $   sudo nano /etc/modprobe.d/raspi-blacklist.conf




Find the I2C line where the I2c is black listed 
   blacklist i2c-bcm2708 




Comment it out by replacing it with the line below 
   #blacklist i2c-bcm2708 


      
<11> Set the bash shell to root by typing (sudo bash) : 
    pi@raspberrypi ~ $   sudo bash




<12> And then run: 
   root@raspberrypi ~ $   echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device


   
<13> Type (exit) to drop out of the root bash shell.
    root@raspberrypi ~ $   exit




<14> You can check the current time on the expansion board with:
    pi@raspberrypi ~ $   sudo hwclock -r


         
 <15> Get the right time set on the Pi ,
     pi@raspberrypi ~ $ sudo date MMDDHHMMYYYY.SS 
              (MM= Month, DD= Date, HH= Hour, MM= Minute, YYYY= Year, SS= Second ) 
                                          example:  2013 Jan 4 , 11:39:00 , sudo date 010411392013.00 




 <16> Write the system time to the expansion board,
    pi@raspberrypi ~ $   sudo hwclock -w


                                         
 <17> Verify the time ,
     pi@raspberrypi ~ $   sudo hwclock -r




Now you have the expansion board running with the current date and time the next step is to make it load when the Raspberry Pi boots. 


 <18> Add the RTC kernel module to the /etc/modules list, so its loaded when the machine boots.  
     pi@raspberrypi ~ $   sudo nano /etc/modules


 And add: i2c-bcm2708 
rtc-ds1307


<19>  Save your changes by pressing Ctrl-x then Y


<20> Create the DS1307 device creation at boot, edit /etc/rc.local by running 
      pi@raspberrypi ~ $   sudo nano /etc/rc.local


                                               
 And add: echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device
sudo hwclock -s


<21>  Save your changes by pressing Ctrl-x then Y


<22>  Reboot your Raspberry Pi 
    pi@raspberrypi ~ $   sudo reboot


    
 If everything worked correctly the expansion board should be initialised on boot and the current date and time will be loaded into Linux