I wrote a 4 bit logic control VI with the LabVIEW Interface for Arduino(LIFA) and I am testing it with LEDs. I've attached a pic of the block diagram and the VI itself. Something funny is happening and I can't figure it out. When I run it, the 3 LSB bits of the array turn on regardless of what my front panel controls are set at, then the proper ones turn on/off after maybe half a second. After that it works fine and I can control each bit properly.
I turned on LabVIEW's execution highlighting and ran it and discovered those pins are turning on during the init.vi. After I stop the VI(stop button for while loop), the bits remain in their last state, when I rerun it, during the init.vi all bits turn off for a split second, then the 3 LSB bits turn on for a split second(regardless of front panel controls), then they turn on/off to reflect the front panel.
Another piece of info: If I unplug the usb cable then replug, those same 3 bits come on, regardless of what they were before I unplugged the cable. Seems to be some sort of default. If it is, how can I set the default for all digital pins to be off? Please help.
4 Bit Logic Control array.vi (11 KB)
