How to Use Opencore's I2C IP for Nios?

Altera_Forum · ‎11-02-2004

hello everyone:

I integrated the Opencore's I2C core into SOPC builder.

But I don't know what PIN primitive for the SDA and SCL output should I place in the Quartus2's BDF design?

(a Output ,Input or Bidiretional pin?)

Please note that in the Opencore's I2C-spec document,it says that we have to add TRI-state buffers for

the SDA and SCL lines.

Please help me to get the I2C core work.

thanks very much.

Best Regards.

Altera_Forum · ‎11-02-2004

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.

Altera_Forum · ‎11-02-2004

It works!Thank you very much,niosIIuser.

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/laugh.gif

Altera_Forum · ‎11-05-2004

Hey Trout,

Maybe you can post that SOPC Builder component into the IP section of the forum. I'm sure several others are interested in an Avalon I2C controller.

Altera_Forum · ‎12-13-2004

Done!

please refer to "post your oun ip" section of the forum.

The title is "Integrate the Opencores's I2C ip into SOPC".

regards.

Altera_Forum · ‎01-31-2011

--- Quote Start ---

Done!

please refer to "post your oun ip" section of the forum.

The title is "Integrate the Opencores's I2C ip into SOPC".

regards.

--- Quote End ---

hi....

i have the i2c hdl files which i got from opencores , i want to integrate this into sopc but finding some problems .can u just provide me the link of your project file as i am finding it difficult to find it in the forum.It would be helpful for me.

regards Udayraj MP

Altera_Forum · ‎02-20-2011

Even I had used I2C verilog code from Opencores. I've successfully simulated it. But I'm unable to synthesize it in Synopsys synthesis tool.

Can anyone help me out???