This first item should go without saying, but I'm worried about
it anyway. Other than the most trivial things (like this README
file), you MAY NEVER use any file while it is still within a zip
file. So, drag out the vi's into a "real" folder before using
them. All the following assumes that there is nothing in a .zip
file!

This is a two-device process. First, we use a UART (USB to RS-232
device) to be able to talk to the device, and this must be 
configured. You need to be an admin to install stuff, so on your
computer, run "makemeadmin". You should be able to install stuff
for about 30 minutes...
Then, we'll add the WITMotion controller itself. The WIT controller
can operate up to 16 servos, similar to the robot controllers
we used on Assignment #7.
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Installing the UART

You only need to do this once. Turn LabVIEW all the way off.
Don't just close all the vi's. Unplug the UART from any USB port. 
Open the UARTDrivers subfolder, and run CP210xVCPInstaller_x64.exe
This will allow our serial controller to show up as a COM port.

This means it has a number (like, COM5). One way to find the number
is to plug in the UART, then run "device manager" on your computer.
The CP210x device will show up as a subset of "Ports (COM & LPT)",
so scroll down to the "P" section and look for it. You'll need
that number later, so maybe write it down! If you change to a
different USB port, you'll get a different number later...
Another way to discover the COM port number is to use LabVIEW.
First unplug the UART from your computer. Then, open the WitMulti
vi in LabVIEW, click the little triangle next to the "VISA resource
name", and choose refresh. Some COM port numbers appear. Then, plug
in the UART and repeat that process. Whatever new COM port number
appears is the UART. 
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You shouldn't need to install anything separate for the WIT motion
controller. But, it needs to be powered... twice!
There's a sketch of the wiring pasted into the block diagram of 
WitMulti.vi.
In summary:
1) Use the green screw terminal to provide power (from a real power
supply) for the motors. Even thought the UART has a little +5V
power supply on it, it's too weak to operate the motors, which is
why you have to use a real power supply. 
2) Wire the controls. On the WIT, use the 4 wire connectors near
the green screw terminal. 
2a) Wire the ground of the UART to the ground of the WIT. 
2b) Wire the receiver "RX" of the UART to the transmitter "TX" of
the WIT. This is the orange wire on the sketch. 
2c) Wire the transmitter "TX" of the UART to the receiver "RX" of
the WIT. This is the teal wire on the sketch.
2d) Wire 3V3 power out from the UART to the 3V3 power in of the WIT.

-Pogo

