I2C CONFUSION, Help needed please


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  1. #10
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    Default Re: I2C CONFUSION, Help needed please

    I couldn't find detailed info on the Write/Read bit of the device address. But I will guess it is bit 7.
    You need to Write to the device first using the address with the "Write" bit set.
    $1B or %00011011 becomes $9B or $10011011

    Without confirming the proper syntax of the commands, here's something off the top of my noodle:

    This will cover steps 1~4 of Section 4.3.2 of the datasheet
    Code:
    I2CWRITE SDA,SCL,[Addr,Loc,]  ' Addr plus Write bit = $9B

    This will cover steps 5~7 of Section 4.3.2 of the datasheet
    Code:
    I2CREAD SDA,SCL,[Addr,Loc]   ' Addr plus Read bit = $1B
    Putting it together should get you moving in the right direction.
    Code:
    I2CWRITE SDA,SCL,[Addr,Loc,]  ' Addr plus Write bit = $9B
    I2CREAD SDA,SCL,[Addr,Loc]   ' Addr plus Read bit = $1B
    Here's a note to myself that might come in handy too:
    Attached Images Attached Images
    Last edited by LinkMTech; - 27th July 2013 at 16:53. Reason: Added I2C screen shot notes
    Louie

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