What is the use of FPGAS and how it differs from the IO Modules
Hi all
Maybe it's a silly question for most of you. But I have very less knowledge about the basic concepts of electronic (FPGA, real-time) to cRIOs. I know that FPGA
can be used to generate circuits within the chip that helps by some logical functions.
I've just started working in the cRIO. My question is that we have Modules e/s making it outputs all the application entry. So, what is the purpose of e/s in the FPGA.
Lets consider that we entered for an application of RTD. In this case the module NI 9217 itself exits 24 bits of data from the RTD measurement which may be the process of the LabVIEW VI. What will be this FPGA between the i/o Modules and the processor will help in? Also I want to know what type of communication is used to send data between the FPGA and host modules.
Thanks in advance
Ajay HI:
Sorry, you do not have an answer to your original question. However, you are right about the benefits of the FPGA. You said, if you build pre-processing in the FPGA, you can unload a lot of potentially CPU calculations out of the host processor. In addition, the program running on the FPGA is highly deterministic and can run the code very quickly. So if you build a kind of guard or evanescent dog part of your application, the FPGA is a good place to put it.
To answer your other questions, communication between the modules and the FPGA is generally above the SPI and the data can be transferred between the FPGA and host via DMA FIFO operating on the PCI bus or single point save access using read/write in the FPGA host Interface controls. You can also use interruptions in signal of disputes between the FPGA host.
I hope this helps, but let us know if you have any other questions.
Tags: NI Hardware
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