簡介:

• 美商國家儀器提供最新的以圖形程式設計快速開發DSP 應用程式-稱為LabVIEW DSP 模組。您可以利用LabVIEW DSP 模組以圖形方式撰寫即時DSP 的程式。

• 基於NI LabVIEW，一套用於設計、量測、與控制的工業化標準工具，NI LabVIEW DSP模組也具有LabVIEW的簡易使用及互動式的性質，就算您不熟 DSP ，也可輕鬆並迅速地建立應用程式。LabVIEW DSP 模組附加了豐富的訊號處理演算法的函式庫，以協助您設計、測試、以及建立應用程式原型。LabVIEW DSP 模組可與多個 DSP 目標裝置配合使用，以提供一個作為最終安裝硬體的選項。

• LabVIEW DSP 模組可支援下列 DSP 目標裝置- SPEEDY-33、C6711 DSK、以及C6713 DSK 系列。

• 近一步說明與資料下載(PDF)

The LabVIEW DSP Module comes with hundreds of built-in signal processing and analysis functions such as different window, transform and waveform generation functions to help you quickly prototype your systems.

For example, the LabVIEW DSP Module can implement digital filters created using the LabVIEW Digital Filter Design toolkit. The LabVIEW Digital Filter Design Toolkit includes configuration-based coefficients generation. Once these coefficients are generated, you can store them in a file and import and implement them on the DSP using the LabVIEW DSP Module.

You can choose from several kinds of design methods including elliptic, chebyshev, and butterworth. Once you define the kind of filter you want and generate the coefficients, you can import it and implement it using the LabVIEW DSP Module.

   
One of the crucial needs of any project is the ability to reuse code easily. The LabVIEW DSP module leverages the power of LabVIEW to create sub-components or subVIs which can then be reused in more complex applications by simply wiring the inputs and outputs.

The ability to reuse tested code in bigger applications simply by connecting inputs and outputs helps modularize applications and make them easier to develop. Also, having subVIs or subcomponents in a program leads to a cleaner design that is easier to debug later.
　

The LabVIEW DSP Module takes advantage of the interactive features of LabVIEW. You can now build powerful and sophisticated GUIs for your DSP applications by using graphs and charts, Boolean switches and LEDs, different types of gauges, sliders, and lots of other extremely useful front-panel objects.
　

LabVIEW DSP makes it very easy for both expert programmers and novice users to build DSP applications. The LabVIEW DSP Module uses LabVIEW Express Technology so you can configure complex operations through a dialog interface, eliminating the need to drop in multiple blocks and connecting them with wires.

Figure 5 shows that the configuration panels include several options from which you can choose. In this example, you can determine whether the function should calculate the RMS or power spectrum measurement. They also can choose to apply a window if they need to; there are several windows available including Hamming, Hanning, and Blackman-Harris. The power of Express VIs is that once the block is configured, all you have to do is connect the inputs and outputs and run the VI. The LabVIEW DSP Module implements the Express VI function on the DSP. Express VIs help reduce the time to market by providing you with the most common options through
　

Most DSP targets have a series of inputs and outputs, both analog and digital. LabVIEW DSP comes equipped with configurable elemental I/O VIs you can use to configure the analog and digital I/O of the DSP target (NI SPEEDY-33, TI C6711 or C6713 DSKs) .

Figure 6 shows the elemental I/O palette in LabVIEW DSP. These I/O VIs are completely customizable by double-clicking on the icon after they are dropped onto the block diagram. Figure 7 shows the configuration screen for the Analog Input VI. As it can be seen in Figure 7, you can select between single-channel or dual-channel modes and whether they want to acquire a single sample or multiple samples. In addition, you also can adjust the sampling rate and other parameters depending on their applications.

You can see the power of using LabVIEW DSP when switching from one hardware target to another. The LabVIEW DSP Module currently supports three DSP targets only – the NI SPEEDY-33 board and the Texas Instruments C6711 and C6713 DSKs - and switching between these targets is extremely easy.
　

You can switch between DSP targets simply through a series of mouse clicks. Figure 8 shows you how to achieve this. You do not need to change your applications for the new DSP target. The LabVIEW DSP module adapts your application to the default settings of the selected DSP target that. All you need to do is click on the “Run” button, and the code is downloaded to the target and executed.

The LabVIEW DSP Module also facilitates developing and deploying standalone DSP applications. In fact, you can deploy and run any application you create with the LabVIEW DSP module in a standalone manner.

To make any application run in a standalone manner on the DSP target, all you need to do is to navigate to Tools > DSP Module > Download to Flash Memory, as shown in Figure 9. The LabVIEW DSP module downloads the application to the flash memory of the DSP. If the DSP target is reset, the application starts running in standalone mode.