IOI2CSendRequest problem

  • Hello,

      I hope that here is correct place to ask about IOKit.

      I have faced problem with IOI2CSendRequest function from
    "IOKit/i2c/IOI2CInterface.h"

    Apple example for fetching EDID from display (using of oxA0 and oxA1
    addresses) works fine.
    But when i'm trying to use 0x6e/0x6F addresses - can't receive response
    from display.
    If i send write command to display, like set brightness, i see that it
    is applied on display. But when i send command for fetching something -
    it is not works.
    The commands itself is correct because same things works in Windows
    realization.

    Part of code and a little more info here:
    http://stackoverflow.com/questions/11561623/i2c-communication-in-iokit-on-m
    ac-os-x


    Is there is any known issues in i2c communication with display?
    Maybe request structure filled wrong?

    Will be great to hear even guesses.

    Thank you.

    Best regards,
    Vitaly Bondar
previous month july 2012 next month
MTWTFSS
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31          
Go to today