I have problem while controlling NI NI8452, Vref voltage. When I plug in My USB device, "NI8452"
i) Vref =0V
ii) After ruing my VI (LabVIEW program), Vref= 3.3V (which is programed value)
iii) After stopping my VI, Vref is again 3.3V. (the value remain same, as programed)
To make Vref = 0V, i have to remove the USB and plugin gain.
Is there anyway that i can make Vref=0V, when i stopped my VI.
Any help would be appreciated.
Solved! Go to Solution.
Did you have any problem, when Vref is 3.3V after communication?
I also experienced the same situation when communicating SPI.
But, I confirmed that the Vref operated well when the SPI communication is executed again.
I am using I2C, and have no issue in communication, when Vref=3.3V.
My main target is to Run VI @Vref=3.3V for sometime, then make Vref=0 (and stop the program for sometime) and again run VI with Vref=3.3V.
Like On/OFF the slave for intended period of time.
I found that I can make a state machine and control the USB using devcon, "https://forums.ni.com/t5/Example-Programs/Devcon-Device-Control-Using-LabVIEW/ta-p/3504765?profile.l..."
Now i have the same issue, The program run well initially, after disable USB 8452 and again enable USB 8452 , I received communication error with the slave.