Control Hints and Tips
Welcome to the I²C ActiveX control web
These pages will be updated to add hints
and tips on how to implement I²C functionality using the the I²C Control
1. Cannot Install USB
There is an issue on some
PCs that causes the 'Mass Storage Device' mode to exit immediately
before the AutoRun install has completed. This may be caused by
third-party software interrogating the files on the Mass Storage Device
and triggering the change back to I²C Device mechanism.
The driver can also be
manually installed, by downloading and running this
Driver Install software. Once run re-connect the I²C Device and follow
the instructions as if the AutoRun had completed sucessfully.
2. Slave Emulation
Address Error (SDK version 2.0)
During Slave Emulation the
Slave Event is called on three occurrences:
i. The Master has Transmit Data to the Slave
ii. The Master is Requesting Data
iii. Data has been Sent to the Master
To distinguish between
case i and iii the Address is used, Even case i, Odd case iii.
In the SDK version 2.0 the Address is always Even.
The Address can be read using the Input property, the first byte of
this will be the actual I²C Address (Even for Master Tx and, Odd for
If you require help or clarification on
how to use the I²C Control then please email