2020. 3. 22. 20:05ㆍ카테고리 없음
Capabilities and Features Data Acquisition Toolbox™ Support Package for National Instruments ® NI-DAQmx Devices provides support for CompactDAQ, X-Series, M-Series, E-Series, USB, ELVIS II, and many other types of data acquisition hardware from National Instruments through. Data Acquisition Toolbox supports the following features of NI-DAQmx devices:.
Analog input. Analog output. Digital input and output. Counter/Timer. Voltage measurements Supported Hardware The support package can be used with the following National Instruments NI-DAQmx devices.
Check the System Requirements To install a hardware support package, you must have a supported product release, along with the required operating system and base product. View the and confirm you have:. A supported release. A supported operating system. The required base products If you do not have a supported release or the required base products, you can get started with a, or you can. Continue with the Installation After confirming you have the system requirements, proceed with either installation option listed below.
Clicking the Get Support Package button provides the support package install file: (filename.mlpkginstall) There are several ways to initiate the Support Package Installer from these files:. Open the.mlpkginstall file directly from your Internet browser. Download and save the file (the default option for some Internet browsers), and open it directly from your Windows, Mac, or Linux operating system. Open the.mlpkginstall file directly from within MATLAB by navigating the Current Folder to the location of the downloaded file and double clicking it. That will initiate the installation for the MATLAB release that you have open. The primary difference between using the.mlpkginstall file (option 2) rather than the toolstrip (option 1) to initiate support package installation is that the file allows the user to avoid the support package selection screen on the installer.These file types were introduced in MATLAB R2013a.
All, I'm attempting to use Python and DAQmx Base to record analog input and generate analog output from my USB 6009 device. I've been using a wrapper I found and have been able to get AI but am struggling with AO. There is a base class NITask which handles task generation etc. The class i'm calling is below. The function throws an error when I try to configure the clock. When I do not there is no error but nor is there voltage generated on the output.
Any help would be appreciated. Your question covers two problems:. Why does DAQmxBaseCfgSampClkTiming return an error?. Without using that function, why isn't any output generated? Hardware vs Software Timing rjb3 wrote: The function throws an error when I try to configure the clock. When I do not there is no error but nor is there voltage generated on the output. Your program receives the error because the USB 600x devices do not support hardware-timed analog output 1: The NI USB-6008/6009 has two independent analog output channels that can generate outputs from 0 to 5 V.
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All updates of analog output channels are software-timed. GND is the ground-reference signal for the analog output channels. 'Software-timed' means a sample is written on demand by the program whenever DAQmxBaseWriteAnalogF64 is called.
If an array of samples is written, then that array is written one at a time. You can learn more about how NI defines timing from the DAQmx help 2.
While that document is for DAQmx, the same concepts apply to DAQmx Base since the behavior is defined by the devices and not their drivers. The differences are in how much of the hardware's capabilities are implemented by the driver - DAQmx implements everything, while DAQmx Base is a small select subset.
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No Output When Software Timed rjb3 wrote: When I do not there is no error but nor is there voltage generated on the output. I am not familiar with the Python bindings for the DAQmx Base API, but I can recommend two things:. Try using the installed genVoltage.c C example and confirm that you can see voltage on the ao channel.
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Examples are installed here: /Applications/National Instruments/NI-DAQmx Base/examples. If you see output, you've confirmed that the device and driver are working correctly, and that the bug is likely in the python file. If you don't see output, then the device or driver has a problem, and the best place to get help troubleshooting is the NI discussion forums at. Try porting genVoltage.c using the python bindings. At first glance, I would try:. Use DAQmxBaseStartTask before DAQmxBaseWriteAnalogF64. Or set the autostart parameter in your call to DAQmxBaseWriteAnalogF64 to true.
References 1 NI USB-6008/6009 User Guide And Specifications:: Analog Output (page 16) 2 Timing, Hardware Versus Software.