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Hi guys; Check out what we are doing with LabVIEW and Arduinos. http://www.tsxperts.com/arduino-compiler-for-labview/ We created an actual LabVIEW compiler for Arduino targets that allows Arduinos to be programmed in LabVIEW. Figured to share this with the community. Cheers Filipe

Let's clarify "Host" and "Target" here. Your myRIO is running a Real-Time operating system; that's considered the "Host." It also contains an FPGA; that's the "Target." If the myRIO supports it, you can also connect directly from the Windows machine to the FPGA, bypassing the Real-Time system, in which case the Windows computer is the "Host" and all FPGA communication between the host and target goes over Ethernet, which is a bit slower. I believe, but don't have a way to test or confirm, that you can still use a DMA FIFO on a remote FPGA target. However, if you are using the Real-Time portion of the myRIO, then the host-to-target DMA FIFO will transfer data from the Real-Time system to the FPGA, and you'll need some other way (such as TCP or UDP) to send data from the Windows computer to the myRIO.

Physical memory access is something you can't do on any modern OS without intervention through kernel device drivers. The entire physical memory access is highly protected from user space applications, and not just to pester users but to protect them. Also the term physical memory address is pretty unclear when you talk about external hardware resources that get mapped into the system memory through techniques like PCI or similar. The resources are typically allocated and assigned dynamically at discovery time (almost anything is nowadays plug and play hardware), which makes it completely unreliable to use fixed addresses even if you can access them through some device driver. You need additional functionality to discover and enumerate the hardware in question before use and query its current hardware addresses which can change with every boot or even plug and play event.

I would push the data from C# to LV using UDP or TCP/IP. It should be quite fast.