I followed the steps in Lesson 4 . GPIO Setup but can not get the bus to work.
My R Pi is 512MB Model B with mounting holes and the 2012 /09/18 distro.
I have a MCP23008 connected per the GPIO Expander project with the Cobbler
Here is what I get at the terminal when looking for connected devices :
i2c-tools is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 168 not upgraded.
pi@raspberrypi / $ sudo i2cdetect -y 1
Error: Could not open file `/dev/i2c-1' or `/dev/i2c/1': No such file or directory
pi@raspberrypi / $ sudo i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory