I/O devices such as general purpose data acquisition cards make use of virtual device drivers employing commands with low level privileges, hardware buffering, and bus-mastering DMA can be used with some effect but cannot remove the limitations of the overall system placed on it by the multitasking environment. Steps can be taken to minimise the problems. This causes problems for time-critical applications in which the time at which the data is recorded is important, and also for applications requiring large amounts of data to be rapidly collected. The three main methods of obtaining data from an interfaced device (polling, interrupts, and DMA) cannot be guaranteed to occur at a particular time. Interfacing in a multitasking operating system like Windows brings with it many issues that may require special attention. Interfacing in a multitasking environment You can find more information about VEE at Agilent's Web site ( Read more Navigate Down VEE Pro supports more instruments, larger programs, and multiple users. VEE OneLab is designed for individual workstations running small-to-medium instrumentation systems. VEE is available in two versions: OneLab or Pro. It works well for IEEE-488.2 devices, where you do not need to know the instrument's GPIB bus address to access it. This has a very useful feature, Auto Discovery, which allows VEE to find instruments connected to the PC's interfaces. Many of these available objects are math and signal processing functions, allowing you to build complex data acquisition systems.Ĭonfiguring instruments is done via the Instrument Manager. There are no separate front panel and block diagram windows in VEE: all objects, interconnects, and displays are in a single window. Originally developed by Hewlett Packard, VEE is strongly geared toward stand-alone instruments connected to a PC via external buses (especially IEEE-488), but it does support some data acquisition cards.Īs with LabVIEW, in VEE you place graphical objects in a work area and connect them to form a program. Howard Austerlitz, in Data Acquisition Techniques Using PCs (Second Edition), 2003 Agilent VEEĪgilent VEE (originally HP VEE) is a Windows graphical programming language, similar to LabVIEW, designed for controlling electronic instruments.
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