i2c 7 bit addressing question when device needs 8 bit

[bmagnan]

Posted on July 07, 2010 at 16:06

i2c 7 bit addressing question when device needs 8 bit

[swhite2]

Posted on May 17, 2011 at 13:57

I2C device addresses are either 7-bits or 10-bits. In 7-bit mode the LSB of the sent byte is the R/W flag. All I2C transfers are in multiples of 8-bits (byte).

http://www.i2c-bus.org/addressing/

Thus in your code you have to shift the physical device address (0xA0) right by one bit (0x50) when you send it.

[bmagnan]

Posted on May 17, 2011 at 13:57 I tried that, and it sent 0x28... am i making this harder than it has to be?