Ni Usb 6501 Drivers For Mac
With plug-and-play USB connectivity, the USB-6501 is simple enough for home and academic applications, but robust and versatile enough for laboratory and industrial applications. Read More Read Less Product Support Resources.
)--April 13, 2005--National Instruments (Nasdaq:NATI) today announced its lowest-priced USB digital I/O device with the new NI USB-6501, a full-speed USB 2.0 device ideal for research, academia and lab automation applications. Priced at just $95, the new device includes 24 digital I/O lines and a 32-bit counter. Because of its small size, plug-and-play connectivity and portability, the USB-6501 is practical for a wide range of users, from students and technicians to engineers and scientists. The new device adds to the more than 20 USB-enabled NI hardware offerings.Engineers and scientists can use the 24 digital I/O lines included in the USB-6501 to interface with LEDs, switches, relays and other digital I/O devices. Each digital I/O signal is protected against overvoltage, undervoltage and overcurrent conditions. The NI USB-6501 includes a 32-bit counter and has built-in, removable screw terminals, eliminating the need for additional connectivity accessories. For embedded OEM applications, NI also offers a USB-6501 board-only design with a 36-pin ribbon cable header instead of screw terminals for easy connectivity.
Like its multifunction counterparts -- the NI USB-6008 and USB-6009 -- the NI USB-6501 ships with NI-DAQmx Base driver software, a multiplatform, open-source driver for Windows, Mac OS X and Linux that includes a subset of the NI-DAQmx programming interface. Engineers can use NI-DAQmx Base to quickly develop customized data acquisition applications using the NI LabVIEW graphical programming environment or C-based development environments, saving time in system setup and configuration.
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National Instruments Data Acquisition
By integrating commercially available silicon and bus technologies with innovative designs, NI data acquisition products continue to improve measurement speed and accuracy while reducing cost for engineers and scientists. NI data acquisition devices are available on the most widely used buses, including PCI, PXI and USB, and work with the industry's most popular operating systems such as Windows, Linux and Mac OS X. Readers can learn more about the latest NI data acquisition hardware and software products and technologies at www.ni.com/daq.
About National Instruments
National Instruments (www.ni.com) is a technology pioneer and leader in virtual instrumentation -- a revolutionary concept that has changed the way engineers and scientists in industry, government and academia approach measurement and automation. Leveraging the PC and its related technologies, virtual instrumentation increases productivity and lowers costs through easy-to-integrate software, such as the NI LabVIEW graphical development environment, and modular hardware, such as PXI modules for data acquisition, instrument control and machine vision. Headquartered in Austin, Texas, NI has more than 3,400 employees and direct operations in approximately 40 countries. In 2004, the company sold products to more than 25,000 companies in 90 countries. For the past six years, FORTUNE magazine named NI one of the 100 best companies to work for in America. Readers may obtain investment information from the company's investor relations department by calling 512-683-5090, by sending e-mail to nati@ni.com or by visiting www.ni.com/nati.
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availability: mgl 2.0 Mac OS X only
usage: mglDigIO(command,<arg1>,<arg2>)
purpose: This is a mac specific command that is used to control a NI digital IO board. It has been tested with the NI USB 6501. It runs as a thread (on 64-bit runs a separate process and communicates via a socket: see below) that reads digital port 2 and logs any change in state (either up or down). It can also be used to set digital lines on port 1 at a time of your choosing. It is used by the task code if you set mglEditScreenParams to use digin. It is the preferred way of dealing with digital I/O since it keeps excellent timing. Note that if you are trying to read events up to about 250Hz (e.g. a square wave of 250Hz), you should be able to read all events without fail. Faster than that at around 500Hz you will likely start dropping events (this is likely due to how fast the NI-DAQ mxBase driver can pool the device). To use this function, you will need to compile it using mglMake('digin');
Here are thte commands it accepts:
| command | purpose |
|---|---|
| 1:'init' | Init the digIO thread. You need to run this before anything else will work. You can optional specify input and output ports which default to 1 and 2 respectively: mglDigIO('init',inputPortNum,outputPortNum); You can also specify the device number using: mglDigIO('init',inputPortNum,outputPortNum,inputDevnum,outputDevnum). You can call init with different port numbers to reset what ports you want to listen/write to/from without calling quit inbetween. |
| 2:'digin' | Returns all changes on the input digital port |
| 3:'digout' | Set the output digital port a time of your choosing. This takes 2 other values. The time in seconds that you want the digital port to be set. And the value you want it to be set too. Time can be either an absolute time returned by mglGetSecs or it can be relative to now if it is a negative value: mglDigIO('digout',-5,0) → Sets the output port to 0 five secs from now. |
| 4:'list' | Lists status and all pending digout events |
| 5:'ao' | Sets the output port to produce a sine wave and then return to 0, you call it with parameters time (like digout above), channel (0 or 1 for A0 or A1), frequency,amplitude (volts peak - it will produce a sine wave that goes from -amplitude to amplitude) and duration in seconds. For example: mglDigIO('ao',-1,0,500,2.5,1);You can optionally set the sample rate (default is 250000 samples/second): mglDigIO('ao',-1,0,500,2.5,1,100000); And you can specify the device number (below will use the default sample rate, and use dev2/ao0): mglDigIO('ao',-1,0,500,2.5,1,[],2);For more info see below |
| 0:'quit' | Closes the nidaq ports, after this you won't be able to run other commands. Note that this does not shutdown the digIO thread. The reason for this is that the NIDAQ library is not thread safe, so you can only call its functions from one thread, so to be able to keep starting and stopping reading from the card, the thread is set to continue to run, and quit simply shuts down the nidaq tasks and stops logging events. After you call quit, you can use init again to restart reading/writing. If you need to shutdown the thread, use 'shutdown' |
| -1:'shutdown' | Quits the digIO thread if it is running, after this you won't be able to run other commands. If you plan on starting and stopping digIO collection, you should use init and quit rather than shutdown |