Forum Discussion

Gerhard56's avatar
Gerhard56
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

I2C master with NIOS 2

Hi, I want to have a soft core NIOS 2 /e, and to the Avalon bus of this processor I want to attach a I2C master. This I2C master should export 2 lines (SDA, SCK) and this two lines (and pull ups) w...
BoonBengT_Altera's avatar
BoonBengT_Altera
Icon for Moderator rankModerator
5 years ago

Hi @Gerhard56,

Thank you for posting in Intel community forum, hope this message find you well and apologies for the delayed in response.
Can you please explain more on the what is looking strange on the design for us to better understand the situation.
In the meantime, I would recommend to check on the following reference design on I2C master with NIOS example here which contain a simple C code to test on the I2C interface.

Warm regards.
BB

Gerhard56's avatar
Gerhard56
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

Hi BoonBang,

I expected two lines, sda and scl, but I get 4 lines ...

Later on I found out, that I have to add some additional buffers to implement the correct hardeware behaviour, cause the FPGA cant do that simpler.

Maybe it will be a nice idea, to include grafics and code in the description so it is easier to start with.

Thanks for the sample. I need a I2C master interface, hope I can find something, but to have a I2C slave ist very good too.

With best regards

Gerhard

  • Gerhard56's avatar
    Gerhard56
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    ... oh, see the your text now. You wanted to send me the i2c_master_sampe_1.zip but I get i2C_slave_sample_1.zip.

    With best regads

    Gerhard

    • BoonBengT_Altera's avatar
      BoonBengT_Altera
      Icon for Moderator rankModerator
      5 years ago

      Hi @Gerhard56,

      The example does comes with the i2c master ip interface, it should be a good example to start with.
      Please do let us know if the example mention does not suit what you are looking for.

      Warm regards
      BB

      • BoonBengT_Altera's avatar
        BoonBengT_Altera
        Icon for Moderator rankModerator
        5 years ago

        Hi @Gerhard56,

        Good day, by any chances did you managed to go through the example?
        Please do let us know if any other clarification that we can help with.

        Warm regards
        BB