Re: I2C ip core integration for ALTERA FPGAs

I have been able to to the wrapper and link it to the avalon bus of NiosII.
Now I have the common problem that I'm not able to write in the registers except prescalere one.
What have I to do? P.s. the scl and sda line are pulled up with 4,7k resistors.(even if now I have done a weak pull-up directly on pins by Quartus)

Any suggestions?
Thanks,
Giuseppe