RT loop rating with FPGA card

[PitchNancy]

Hello,

With my pxi FPGA and RT 8186 controller I obtain only 20 kHZ of loop rate. I use IRQ method and acquire 8 analog input. I make for the moment no processing on FPGA and RT.

Can you say me if you have similar results or better ?

[PitchNancy]

Hello,

With my pxi FPGA and RT 8186 controller I obtain only 20 kHZ of loop rate.  I use IRQ  method and acquire 8 analog input. I make for the moment no processing on FPGA and RT.

Can you say me if you have similar results or better ?

4057[/snapback]

Hi,

After doing some test I have a beginning of explication. I have used the real time system manager to evaluate the CPU usage. I have acquired 8 analog Input with FPGA and transmitted them to RT by the IRQ method. I did the test for cluster, array, and 8 single channel transmission.

After 20000 Hz the RT CPU usage was superior than 100 %, and bug. I attach my VI and my results.

Download File:post-1636-1109952736.zip

Download File:post-1636-1109952738.pdf