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README.TXT
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1992-05-22
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Users Guide for the Wavelet Analyzer
HARDWARE CONFIGURATION
The wavelet analyzer program, ANALYZER.EXE, is supplied with
two configuration files, ANALYZER.C0G and ANALYZER.C1G. The
first file is for use with a Burr-Brown ZPB32 DSP board with a
base address of 0x300. The second is for use with a ZPB34 DSP
board with a base address of 0x310. Select the appropriate
configuration file for the DSP board you have and rename it to
ANALYZER.CFG. The DSP COFF files, ANLYZR32.DSP and ANLYZ32C.DSP,
are for the ZPB32 and ZPB34, respectively. Only one of these
COFF files are used at any time; the unused COFF file can be
deleted if desired.
If neither configuration file is appropriate for your needs,
running ANALYZER.CFG without ANALYZER.CFG will result in the
generation of a new configuration file. You will be prompted for
the board type and its base address. Once the configuration data
is properly entered, ANALYZER.EXE will proceed with its exection
to the main screen.
The only commercial DSP boards currently supported are the
Burr-Brown DSP boards mentioned above. In addition to the DSP
board, a ZPB100 codec board is also required for analog I/O. The
CODYBOARD is a homemade board I constructed using the AT&T DSP32
and a codec on one IBM PC-AT board. The Burr-Brown DSP boards
can now be purchased from Intelligent Instrumentation, a Burr-
Brown company. Their address is:
Intelligent Instrumentation, Inc.
1141 West Grant Road, MS131
Tucson, AZ 85705
Telephone: (602) 624-2434
FAX: (602) 623-8965
The ZPB100 codec board should be jumpered to pass the
incomming audio signal through the input amplifier prior to
entering the codec. The gain of the input amplifier should be
adjusted so that the maximum voltage at the input of the codec
does not exceed 1.578 volts peak. Consult the ZPB100 manual for
specific jumper settings.
WAVELET ANALYZER OPERATION
Once the main screen appears, you will see that there are
thirteen control positions running along the lefthand side of the
display. The top eight positions control the vertical scale of
the eight input signal and wavelet transform coefficient traces.
The bottom five positions control the freezing of the display,
the execution of the transform, the selection of alpha and beta,
and the termination of the program. These thirteen controls are
selected and controlled in the following manner:
Control Selection
<Up Arrow> - Pressing this key moves the active control selection
indicator up the screen. When either the ALPHA or
BETA control is selected, its entry field is also
enabled. Pressing the key during an ALPHA or BETA
entry aborts the entry, restores the original
value, and disables the entry field. Pressing the
key when the INPUT vertical scale setting control
is selected causes no action.
<Down Arrow> - Pressing this key moves the active control
selection indicator down the screen. When
either the ALPHA or BETA control is selected,
its entry field is also enabled. Pressing the
key during an ALPHA or BETA entry aborts the
entry, restores the original value, and disables
the entry field. Pressing the key when the
lowest active control is selected (QUIT when the
transform is not running, HALT when it is
running) causes no action.
<Page Up> - Pressing this key moves the active control
selection indicator up to the INPUT vertical scale
setting control at the top of the screen. Pressing
the key during an ALPHA or BETA entry aborts the
entry, restores the original value, and disables
the entry field. Pressing the key when the INPUT
vertical scale setting control is selected causes
no action.
<Page Down> - Pressing this key moves the active control
selection indicator down to the lowest active
control on the screen (QUIT when the transform is
not running, HALT when it is running). Pressing
the key during an ALPHA or BETA entry aborts the
entry, restores the original value, and disables
the entry field. Pressing the key when the
lowest active control is already selected causes
no action.
Vertical Scale Controls
<Left Arrow> - Pressing this key increments the vertical scale
setting for the selected wavelet transform level
or input trace. The maximum vertical scale is
±1.0.
<Right Arrow> - Pressing this key decrements the vertical scale
setting for the selected wavelet transform
level or input trace. The mimimum vertical
scale is ±0.001.
Wavelet Transform Controls
RUN / HALT - Pressing the <Enter> key toggles running of the
fast wavelet transform loaded on the DSP board. As
the transform runs, the input data and the
transform coefficients scroll across the display.
The coefficients scroll at different rates due to
increasing time dilation at lower levels of the
transform.
HOLD / CONTinue - Pressing the <Enter> key toggles freezing of
the scrolling display. Page flipping of the
graphics display is suppressed and only the
hidden display page is updated. When
scrolling is CONTinued, the display resumes
with the image saved on the hidden page, as
if the diplay had no been frozen.
ALPHA / BETA - The only keys recognized are the numbers
('0' -'9'), the minus key ('-'), the period key
('.'), the <Backspace> key, and the <Enter> key.
The <Backspace> key is used to edit entries into
the fields. The <Enter> key completes the field
entry. If the new value is valid and within
range (-π ≤ α,ß < π), it is accepted. A value
different from the original value causes
calculation and display of the new scaling and
wavlet functions.
QUIT - Pressing the <Enter> key when QUIT is selected causes
termination of the Wavelet Analyzer and return to DOS.
Here are some example values for alpha and beta:
ALPHA BETA DISCRIPTION
(equals beta) (equals alpha) Haar 2-coefficient wavelet,
vanishing 0th moment
1.047197551 0.0 Daubechies 4-coefficient wavelet,
vanishing 1st moment
1.3598037324 -0.782106385 Daubechies 6-coefficient wavelet,
vanishing 2nd moment
Note: The greater the number of vanishing moments, the better the
wavelet is capable of reducing energy in the high frequency terms
of the transform coefficiets.
COMPILING THE WAVELET ANALYZER CODE
The wavelet analyzer C code is written in Turbo C 2.0 and
compiled using the Borland Integrated Development Environment
(IDE). The assembly language code elements in V592X480.C and
DSP_CTRL.C are generated through the __emit__ facility. Though
not as clean or transportable as inline assembly or a separate
language module, it does allow compilation within IDE. Going
this route, I didn't have to learn as much about assembly
language programming or use the Borland command-line compiler
(TCC) either. Perhaps, in a future version of this software,
I'll bite the bullet and really learn assembler and/or use TCC.
For those wanting to use TCC or another compiler, I have
provided the Integrated Make project file and the following list
of compiler and optimization switch settings taken from my Turbo
C IDE:
Calling convention C
Instruction set 80186/80286
Floating point Emulation
Default character type Signed
Alignment Word
Generate underbars On
Merge duplicate strings On
Standard stack frame On
Test stack overflow On
Optimize for Speed
Use register variables On
Register optimization On
Jump optimization Off
Using this information and the project file should allow the
creation of a make file for TCC. For those who wish to use
Borland's later compilers, it is necessary to carefully analyze
the compiled code generated by the mix of assembly and C code.
Those who wish to use C compilers other the Borland's will also
have to translate Borland-specific library calls (including
__emit__) to comparable calls in their complers' libraries.
A BIGGER, BETTER WAVELET ANALYZER?!
If there is sufficient interest in such a commercial product,
I would like to expand the features of the wavelet analyzer.
These features would include:
- Larger order wavelets
- The wavelet packet transform
- Screen dump facility
- Signal and transform data capture and storage
- Support of more DSP boards
- Greater sampling rates
- anything else useful for realtime wavelet analysis
Any and all comments and suggestions are welcome. I can be
reached either via GEnie MAIL as M.CODY1 or by writing
(preferably) or calling me at:
Sunair Electronics, Inc.,
3101 SW Third Avenue,
Ft. Lauderdale, FL 33315-3389
Telephone: (305) 525-1505
Hope you enjoy the wavelet analyzer and find it a useful tool!
Mac A. Cody