Enable I2C

[JonnyAlpha]

Hi;

I am trying to connect my Model B Pi to an Arduino Nano ATMega328 via I2C.
This is the guide I am using:
http://blog.oscarliang.net/raspberry-pi ... nected-i2c

However when I started to following the guide on enabling I2C I could not find the configuration files that the guide was referring to, the raspi-blacklist.conf file did not exist.

I read this post:
viewtopic.php?f=44&t=98318

And loaded up raspi-config and followed the onscreen prompts to enable I2C and the Kernel.

Was this correct.

The guide then says to add i2c-dev to the modules script and install i2c tools and allow the Pi user to access i2c devices.

Is this all still correct?

Thanks

[joan]

Add the following line to /boot/config.txt

dtparam=i2c_arm=on

Add the following line to /etc/modules

i2c_dev

Reboot.

[JonnyAlpha]

Thanks joan;

The next line in the guide says to enter:
ll /dev/i2c*

At the command prompt, after I received a bash error I figured this was a type or character problem and entered:
ls/dev/i2c*

This only lists one item:
/dev/i2c-1

The guide suggests that there is also:

/dev/i2c-0

???

[joan]

The other bus (i2c-0) isn't normally enabled as it's used for HAT EEPROMS and, I think, for internal control of the Pi camera.

You can enable it if you want in /boot/config.txt. Look in /boot/overlays/README for details.

[JonnyAlpha]

I found other errors in the guide (written 2013!!!)
So I did a Google date refined search and found another guide on setting up i2c:

http://www.raspberrypi-spy.co.uk/2014/1 ... pberry-pi/

Just need to find an up to date guide on connected RPi to Arduino using i2c now

[joan]

I found other errors in the guide (written 2013!!!)
So I did a Google date refined search and found another guide on setting up i2c:

http://www.raspberrypi-spy.co.uk/2014/1 ... pberry-pi/

Just need to find an up to date guide on connected RPi to Arduino using i2c now

That guide is out of date as well. It predates device tree, you should not add an entry for i2c_bcm2708 in /etc/modules.