How can I make n-bit data generator?

[radiogaga]

clock, data, enable
How do you make a 9 bit data generator using these three?
I want to use this code to express 9 bits of data in a square wave on the instrument.
The frequency and amplitude must be adjustable in the code.
Please, let me know.

I use Daqmx program.

[freeown]

You should search for some example codes in LabVIEW. 

There are some voltage output example codes.

"Voltage - Continuous Output.vi"  would be helpful to your application.

Here is the instruction to find out examples codes. 

http://www.ni.com/getting-started/labview-basics/examples