National Instruments PC-DIO-96 Manual de usuario descargar pdf (Pagina 16)

Chapter 1 Introduction

NI-DAQ Driver Software

The NI-DAQ driver software is included at no charge with all National Instruments DAQ

hardware. NI-DAQ is not packaged with SCXI or accessory products, except for the SCXI-1200.

NI-DAQ has an extensive library of functions that you can call from your application

programming environment. These functions include routines for analog input (A/D conversion),

buffered data acquisition (high-speed A/D conversion), analog output (D/A conversion),

waveform generation, digital I/O, counter/timer operations, SCXI, RTSI, self-calibration,

messaging, and acquiring data to extended memory.

NI-DAQ has both high-level DAQ I/O functions for maximum ease of use and low-level DAQ

I/O functions for maximum flexibility and performance. Examples of high-level functions are

streaming data to disk or acquiring a certain number of data points. An example of a low-level

function is writing directly to registers on the DAQ device. NI-DAQ does not sacrifice the

performance of National Instruments DAQ devices because it lets multiple devices operate at

their peak performance.

NI-DAQ also internally addresses many of the complex issues between the computer and the

DAQ hardware such as programming interrupts and DMA controllers. NI-DAQ maintains a

consistent software interface among its different versions so that you can change platforms with

minimal modifications to your code. Figure 1-1 illustrates the relationship between NI-DAQ and

LabVIEW and LabWindows/CVI.

LabWindows/CVI

(PC or Sun 

SPARCstation)

LabVIEW 

(PC, Macintosh, or 

Sun SPARCstation)

Conventional 

Programming 

Environment 

(PC, Macintosh, or 

Sun SPARCstation)

NI-DAQ

Driver Software

DAQ or

SCXI Hardware

Personal 

Computer or 

Workstation

Figure 1-1. The Relationship between the Programming Environment,

NI-DAQ, and Your Hardware

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 104 105

Sin comentarios

National Instruments PC-DIO-96 Manual de usuario Pagina 16