Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Altera Avalon I2C Master Core API Timeout

I am using the API with the Altera Avalon I2C Master core in non-interrupt mode. It works fine except when I try to access a device that is not currently on the I2C bus. Even though the driver code appears to have timeouts coded, it takes over an hour to timeout with a 100 MHz NIOS processor. Has anyone found and solved this problem?

Thanks,

Ron

2 Replies

  • GHoge's avatar
    GHoge
    Icon for New Contributor rankNew Contributor
    6 years ago

    Looks like just poorly written code. You can modify the altera_avalon_i2c.c file yourself and streamline some of the wait states and wait times. But that becomes a configuration control nightmare for me. Were you ever able to resolve this any other way?

    • MRezn's avatar
      MRezn
      Icon for New Contributor rankNew Contributor
      5 years ago

      altera/intel soft/hard i2c ipcore (even in silicon) hangs of any noise and I think you can hardly repair it

      use your own soft controller