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Thread: I2C bus on WL-500gx - where to find?

  1. #1

    I2C bus on WL-500gx - where to find?

    Hi, all!

    Two years ago I have completed a project, that connects an HD44780 LCD to PC via I2C bus. Software was written for Windows and FreeBSD. Today I have purchased WL-500gx and I wish to implement my project for this beast. Howewer, I do not know how to connect to I2C bus. Where can I solder two wires to get SDA and SCL lines? Is there any I2C driver? How can I talk to I2C bus on this platform?

    Thank you!

  2. #2
    Quote Originally Posted by Sanvean
    Howewer, I do not know how to connect to I2C bus. Where can I solder two wires to get SDA and SCL lines? Is there any I2C driver? How can I talk to I2C bus on this platform?
    AFAIK there are three unused port pins on Broadcom CPU. Maybe you can use those? I just don't know how to access them though ...

  3. #3
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    Quote Originally Posted by Sanvean
    Hi, all!

    Two years ago I have completed a project, that connects an HD44780 LCD to PC via I2C bus. Software was written for Windows and FreeBSD. Today I have purchased WL-500gx and I wish to implement my project for this beast. Howewer, I do not know how to connect to I2C bus. Where can I solder two wires to get SDA and SCL lines? Is there any I2C driver? How can I talk to I2C bus on this platform?

    Thank you!
    The cpu does not have i2c controller, but it has unused gpio lines, which are wired to header. Check internals.

  4. #4
    Thank you for answers,

    I already have ported i2c-gpio kernel driver from OpenWRT. Module successfully loads, creates appropriate devices on /dev fs, but it does not see any i2c devices. I need to check all signal timings -- it's a question of time.

  5. #5
    Great idea! Have you any progress?

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