Echelon ISI - Manual (Page 67)

65 ISI Programmer’s Guide
Function Name Reason to Override
IsiSetConnection() This function must be overridden when
implementing a custom connection table.
When this function is overridden,
IsiGetConnectionTableSize() and
IsiGetConnection() must also be overridden.
The default implementation of the
connection table has eight entries stored in
EEPROM.
The connection table functions are typically
overridden to create a connection table with
a size fitting the application, or with a
persistent data storage model that fits the
application’s needs. See Customizing the
ISI Connection Table for more information.
IsiSetDomain() This function should only be overridden to
allow ISI to run in a managed development
and debugging environment by disabling the
ability to change the domain. See
Developing and Debugging an ISI
Application for more information and
important considerations.
IsiUpdateDiagnostics() This function is used to provide feedback
about the internal state of the ISI engine.
The application may override this function
for enhanced diagnostics during
development and testing.
This function is rarely overridden and
should only be used in a debugging or
testing environment. This function may not
be supported by all ISI libraries.
IsiUpdateUserInterface() This function is used to provide feedback
about the state of the ISI engine to the user.
It should be overridden in any application
that needs to provide feedback to a user.
Forwarders
You can create your own compatible implementations of most of the ISI library
functions, which will then be used instead of the library function. You may
frequently override some of the functions. For example, the IsiGetAssembly()
function determines if an incoming open enrollment message describes an
acceptable connection for this device, and to which local assembly the enrollment
could apply. The ISI library contains default implementations of these functions