Why arent my sensors working?

[milo_unlimited]

I've got a single board RIO and a few sensors. I cant get the sensors to work. More accurately, the sensors are working, but LabVIEW isn't giving me correct values. I checked the pin-values with my multimeter and the sensor works correctly.

The frontpanel always shows that the sensoroutput is allways high, but when I measure on the actual pin, the voltage is at 15mV. Even when I connect the pin directly to a ground pin, it still says its high (tried the same with a 5v pin and it also gives a high level).

I added a picture of the FPGA code i used (simple as it may be).

Can somebody help me?

[johnsold]

I have not used FPGA but the image you showed is a Digital I/O connected to a binary indicator.  Where is the sensor connected? 

Lynn

[milo_unlimited]

The FPGA controls all the I/O on the board. The sensor uses 3 pins: 5V, GND and one pin to detect high level/low level (Port5/DIO3). The FPGA module forwards the value to the other processor to enterpret.

Thanks for trying to help, I'm really aching for help.

[ninlmartijn · Accepted solution]

Dear milo_unlimited,

please notice that you connected a boolean true to the conditional terminal of the while loop; the loop wil execute only once.

Best regards,

[milo_unlimited]

Which explains a lot.

Thanks!