Pandaboard ES rev b1, enable I2C-4 to communicate with DE0-NANO FPGA

[SamuelLAM]

Pandaboard ES rev b1, enable I2C-4 to communicate with DE0-NANO FPGA

I am a newbie to use Pandaboard ES, and DE0-NANO FPGA, 

Now my idea is sending some data from pandaboard es to DE0-NANO through I2C, but never succeed.

So what can I do to set this configuration up. What pre-built img can i start for like ubuntu 12.04........

Thanks for help