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Altera_Forum's avatar
Altera_Forum
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13 years ago

opencores i2C

Sorry if I am repeating something here, but I have not been able to work with the OpenCores I2C core. I think I somehow get it into Qsys but then I can never generate my system I am assuming because it has errors associated with the core in Qsys. I tried it again in SOPC but I still have the same issue.

Is there a step by step guide on how to use this from the beginning? I see some people say they have got it into SOPC, but they never say anything about any errors or what they had to do to get it in there.

Again, sorry if I just haven't seen what I need yet.

I am fairly new to Quartus and I had my system up and running with the included Altera IP with no problems until I tried to use this core.

Thanks,

- Compugator

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    There are a few I2C cores available on OpenCores. Which one are you using?

    What errors do you get exactly?

    I think the core comes with a Wishbone interface or anything similar, so you probably added a wrapper to provide an Avalon MM slave interface, didn't you? Is your problem here?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    I am using the OpenCores I2C at opencores.org/project,i2c

    I have even tried using the OpenCores I2C wrapper found at alterawiki.com/wiki/OpenCores_I2c.

    The component in Qsys only has 1 or 2 signals, but I am seeing the following errors.

    It says I must have an associated clock and an associated rest neither of which show up in my Qsys component as available signals.

    It says I also have a read interface but no read control and I should have a waitrequestsignal for read burst transfers.

    I would include the links as links and an image of the errors, but it says I cannot because I have too few posts.

    Thanks.
  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    --- Quote Start ---

    I have even tried using the OpenCores I2C wrapper found at alterawiki.com/wiki/OpenCores_I2c.

    The component in Qsys only has 1 or 2 signals, but I am seeing the following errors.

    It says I must have an associated clock and an associated rest neither of which show up in my Qsys component as available signals.

    --- Quote End ---

    That's because the wrapper on the Wiki was created for sopc builder V9.1, not Qsys.

    You need to change some lines of _hw.tcl file according to Qsys required syntax.

    I suggest you take a *_hw.tcl file from another Qsys built-in component and use it as a template for your i2c custom component.