How to Use Opencore's I2C IP for Nios?

Hello trout,

If you have integrated the I2C IP from Opencores into your system correctly there are only some more steps to bring it to work.

1. Insert -> Symbol ...

2. 2x primitives -> buffer -> tri

3. 2x primitives -> logic -> not

4. 2x primitives -> pin -> bidir

5. connect "scl_padoen_o" and "sda_padoen_o" to the input of the "not"-logics

6. connect "scl_pad_o" and "sda_pad_o" to the input of the "tri"-buffers

7. connect the output of the "not"-logics to the corresponding output-enables of the "tri"-buffers

8. name the output of the "tri"-buffers "i2c_scl" and "i2c_sda"

9. connect "i2c_scl" and "i2c_sda" to the corresponding inputs of the I2C IP

10. connect "i2c_scl" and "i2c_sda" to "bidir"-pins

That's it!

Bye,

niosIIuser

PS: Why can't we upload images? This function would be very helpful.