RTLI Example
The RTLI example shows an interpretive RTLI can be used to drive a real-time system within its deterministic requirements yet sill allow for quick modification of the human-computer interface. The example also shows how a FIFO can be used to connect an interpretive real-time application with the real-time module. FIFOs are often used to connect a non-real-time human-computer interface to a real-time application, or for data logging to a storage device. The experimental example allows users to control the internal speaker of a computer by modifying the interrupt frequency driving the speaker.

This example requires the following:
      RTAI should be installed and a RTAI patched kernel should be running.
      A web server should be installed along with Ch CGI.

Files used in the example:

common.h:	Header file containing shared variable names.
fifo_app.c:	Source code for the command line version of the real-time application.
fifo_app_gui.c:	Source code for the gui version of the real-time application.
fifo_task.c:	Source code for the real-time task.
rtai_fifo.html:	Website HTML for the Web-based control interface.
fifo_app_cgi.ch:	Ch CGI code for Web-based control.
speaker_freq.chf:	Ch function file that changes the frequency output for the speaker.
speaker_off.chf:	Ch function file that disables the speaker.
speaker_on.chf:	Ch function file that enables the speaker.

common.h
fifo_app.c
fifo_app_cgi.ch
fifo_app_gui.c
fifo_task.c
rtai_fifo.html
speaker_freq.chf
speaker_off.chf
speaker_on.chf

Screenshots:

Running the speaker functions at the command line.




Using the Gtk GUI version of the real-time application.




Using the Web-based Interface version of the real-time application.




Result from the Web-based Interface.