National Instruments measurement devices are packaged with NI-DAQ driver software, an extensive library of functions and VIs you can call from LabVIEW to program NI measurement devices. Measurement devices include DAQ devices such as the M Series multifunction I/O (MIO) devices, signal conditioning modules, and switch modules. Driver software has an application programming interface (API), which is a library of VIs, functions, classes, attributes, and properties for creating applications for a device.
NI-DAQ 8.x comes with the latest version of the software driver, which is called NI-DAQmx. NI-DAQmx replaces Traditional NI-DAQ (Legacy). NI-DAQmx and Traditional NI-DAQ (Legacy) have their own APIs, hardware configurations, and software configurations.
|Note (Windows) LabVIEW supports NI-DAQmx and the DAQ Assistant. (Mac OS X) LabVIEW supports NI-DAQmx Base but not the DAQ Assistant. (Linux) LabVIEW supports NI-DAQmx but not the DAQ Assistant. Refer to the NI-DAQ Readme for more information about platforms supported by NI-DAQ software.|
NI-DAQmx is the latest NI-DAQ driver with the following advantages over Traditional NI-DAQ (Legacy):
Traditional NI-DAQ (Legacy) is an upgrade of the earlier version of NI-DAQ. Traditional NI-DAQ (Legacy) has the same VIs and functions and works the same way as NI-DAQ 6.9.3, except you can use Traditional NI-DAQ (Legacy) and NI-DAQmx on the same computer, and some hardware is no longer supported. (Windows Vista) You cannot use Traditional NI-DAQ (Legacy) on Windows Vista.
You should install and use NI-DAQmx if one of the following situations apply:
|Note (Mac OS X) LabVIEW supports a Base version of NI-DAQmx on Mac OS X. Refer to the National Instruments Web site to download the NI-DAQmx Base driver. (Linux) Refer to the National Instruments Web site for information about which Linux distributions NI-DAQmx supports.|
You should use NI-DAQmx if you can. Install and use Traditional NI-DAQ (Legacy) if one of the following situations apply:
|Note The earliest version of NI application software supported by Traditional NI-DAQ (Legacy) is version 6.0. LabVIEW versions 6.x and 7.x can use Traditional NI-DAQ (Legacy) from the NI-DAQ 8.x distribution.|