Transferring data from RT host to FPGA target (Using DMA)

[Can1985]

Hi, 

I want to transfer an array from RT Host to FPGA target. I've found an example which works fine. Screenshots of the VIs are attached. (If VIs are needed, I can share them.)

This RT host VI works for a finite array. I want to be able to update that array in any time I need. I couldn't find a way to do that. Could you please show me a way to update the array whenever I want? I tried a Case structure with a Latch control in a loop but a lot of data were lost. 

Regards,

[alcava.cr]

Hello,

It is not clear to me where (FPGA or RT side) would you like to work with the array. If you are planning to work on the Real-time side simply use the array functions and check the basic examples (arrays.llb).

On the other hand, if you plan to work with arrays on the FPGA side I recommend caution. Regular restrictions are to never auto grow arrays or work with large amount of data, you will get compilation errors and would spend a lot of space and slides respectively.

I strongly recommend checking the following links:

1. Tutorial: Arrays and Clusters

2. Replace Array Subset Function - LabVIEW 2012 Help

3. Using Fixed-Size Arrays in FPGA VIs (FPGA Module) - LabVIEW 2012 FPGA Module Help

4. Why Shouldn't I Use Large Arrays When Developing FPGA Applications?

Regards,