This demos will create a rt_task that causes the internal
speaker to produce a tone. The tone is controlled by
the user in the user space and is modified through the
use of real-time fifos.

Do the following to run the demo:
(You must be a superuser while running these commands)
-----------------------------------------------------------------
> ./configure
> make clean; make
> ./instrl //loads the required modules

> ch ./fifo_app.c
// or
> ch ./fifo_app_gui.c //for a gui version of the app

> ./rmrtl //unloads the loaded modules

Commands while running fifo_app.c:
----------------------------------------------------------------
on           Turns on the fifo_task
off          Turns off the fifo_task
freq ###     Changes the output frequency to ###
quit         Exits
