NI-SCOPE Programming Flow

NI High-Speed Digitizers Help (NI-SCOPE)

Edition Date: January 2017

Part Number: 370592AB-01

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NI-SCOPE provides the same functionality in two formats:

  • In LabVIEW as VIs
  • In traditional programming languages as functions
Note  If you are new to NI-SCOPE, read Getting Started with NI-SCOPE (Tutorial) before you read this section.

The following diagram illustrates the basic programming flow for using NI-SCOPE functions in your own digitizer applications.

For any application you write, you must open a session to establish communication with the digitizer by using Initialize. When your program finishes, you must close the session with Close.

Initialize sets the driver and digitizer to a known state. This function may take a significant amount of time compared to all other NI-SCOPE functions, so you should not include it in a loop when repeatedly acquiring data. Ideally, your program should call Initialize one time. If the reset parameter is set to TRUE, the digitizer resets to the default state, which may include resetting relays and resetting time stamp counters.

Caution  Resetting the digitizer may cause wear on the relays, so you should reset only when necessary.

Close is essential for freeing resources, including deallocating memory, destroying threads, and freeing operating system resources. You should close every session that you initialize, even if an error occurs during the program. While debugging your application, it is common to abort execution before you reach Close. While aborting the execution should not cause problems, NI does not recommend doing so.

Examples

All NI-SCOPE examples include Initialize, Close, and Error Handler (except for LabVIEW). The Getting Started example is a good choice to start with if you are inexperienced with NI-SCOPE because it is the simplest example.

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