
Application:            'C5X DSK OSCILLOSCOPE

Input:          Keyboard host driven.

Output:         Displays 256-point FFT of AIC input on PC screen.
                Data rate is 115200 Baud.


Requirements:   EGA/VGA graphics capability

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RUNNING THE 'C5X OSCILLOSCOPE

After you decide where this application will reside on your PC, it is
important to make sure the following files are in the same directory:

                SPEC50.EXE
                SPEC50.DSK
                EGAVGA.BGI

To execute, type the following:   C:\> SPEC50 -Cx
                                  x = 1, 2, 3 or 4 for commport 1, 2, 3
                                  or 4 respectively. Default=1.

Baud Rate is automatically set to 115200.


Please remember SPEC50.EXE an executable for your PC. Upon execution of the
.EXE, the application file named SPEC50.DSK will automatically be loaded
into your DSK. By default the program will begin displaying the 256-point
radix-2 FFT of the AIC input frame by frame. The AIC samples the input (IN+)
at 9.921KHz and sends the data back to the PC at 115200 baud. The assembly
and C++ source code are included. The user can modify the source code to
change the sampling rate and FFT size.

The following is a list of spectrum functions:

Average Samples  - you can disply the frame by averaging every 2, 4 or 8
                   frames. This will improve the SNR that display on the PC
                   screen. Press 'A' will change the average number from 1,
                   2, 4 or 8.

Reset            - Press 'R' to reset the device and PC screen.

Quit             - Press 'Q' will quit the program and return to DOS prompt.

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Files:
             SPEC50.ASM   - Assembly source code for 'C5x DSK
             DSK_TWID.ASM - Twiddle table for 256/512 points FFT
             EGAVGA.BGI   - EGAVGA.BGI graphics driver.
             SPEC50.DSK   - Assembled DSK file. Loaded into DSP.
             SPEC50.EXE   - Spectrum executable for the PC.
             SPEC50.C     - C++ source code for SPEC50.EXE.
             LICENSE.TXT  - Texas Instruments License Agreement for
                            downloading DSP code.
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