I have Labview 7.1 and FPGA module. I have been doing FPGA module training on web. There was an exercise Custom Trigger. I have done this FPGA - VI and Host- VI correctly. But after I have done these I have tried to control the output voltage with this Host Vi, but this comes nothing. I can get voltage of 280 mV out of bord but I can't control the voltage. What is the problem?