How to create a simulator of hall sensor using NI USB-6221

Hello.

I am creating a hall sensor Simulator using the NI USB-6221 case.

The idea is to have three digital outputs that generates output a digital pulse according to six different stages train.

See the table below.

And it's interesting to have this work in for example 5000 RPM (meaning 2 milliseconds between each stage).

My question is, is it still possible with the NI USB-6221 housing?

I tried to create a simple state machine, leading the outputs according to a predefined table.  But it became clear that it is far too slow.  The NI USB-6221 uses 10 to 15 ms to generate a numerical value of LabVIEW.

Thanks for any ideas on how to do it.

Looking at the datasheet.

http://sine.NI.com/DS/app/doc/p/ID/DS-10/lang/en

Under the digital I/o, you can see that the digital lines on Port 0 maximum clock frequency is 1 MHz.  This means that you can go from a Summit to a minimum once all the 1 micro second.  Your hardware is capable.

The software side of things you should realize that to change the digital line from a high to a low that fast, you need to use certain types of calendar that does not have Windows.  Windows (and other operating systems) are not deterministic.  So instead of being in a loop from one State to the other, put in the buffer of the DAQ one card series of digital States and then specify the DAQ hardware to read at a given speed.  Then your synchronization is performed by the hardware, not by your software.

Search for finder example for Digital - output continuous for an example on how to do this.

Tags: NI Software

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