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Use the I
2
C Message Editor to:
1. Set I
2
C Address.
The I
2
C Address is the I
2
C slave address of the slave device being addressed
on the bus. All slave addresses are displayed as even numbers (00...FE),
representing the 7 most significant bits of the 8-bit slave address transmitted
on the bus (aaaa aaa0).
The I
2
C adapter automatically supplies the 8
th
, least significant, Read/Write bit
when it sends the slave address across the bus. For master write operations,
the Read/Write bit is always transmitted as a logical 0 (aaaa aaa0). For master
read operations, the Read/Write bit is always transmitted as a logical 1 (aaaa
aaa1).
Use the I
2
C Address control to set the slave address of the slave device you
want to address on the bus.
2. Set Message Read/Write Direction.
As a bus master device, the I
2
C adapter can write data to, or read data from,
any device on the bus. Use the Msg Direction control to specify if the current
message is a master write, or master read, operation. Upon making your
selection, additional Write or Read parameters appear.
3. Specify Repeated Start Messages.
I
2
C Bus communications support an operation called Repeated Start. In this
operation, a message is sent across the bus beginning with a Start Condition,
but without a Stop Condition at the end of the message. The next message sent