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Application Notes
Introduction
A hardware handler lies in between the TestExec SL and the driver for a hardware module. The purpose of having a hardware handler is to enhance TestExec SL’s ability to control devices by communicating directly with the instrument’s driver. In other words, the handler contains codes that implement the functions called by TestExec SL when it interacts with the hardware. Hardware handlers can be written in C/C++ or any of the managed (based on Microsoft’s .NET software technology) programming languages, including C# and VB.NET.
There are distinctive advantages of using the hardware handler. Firstly, hardware handler offers ease of maintenance in terms of code development. Since function calls are generally the same across instruments, it is easier to reuse actions for different types of test systems. Subsequently, tests or testplans built from the same actions can also be reused. As a minimum prerequisite, all hardware handlers require general purpose functions that are compatible with various kinds of hardware modules:
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