EVAL-AD7899CB Datasheet, PDF (8/12 Pages) –

EVAL-AD7899CB
Figure 4. The Setup Screen
configuration file and click Load. The Evaluation Board
Controller will be reset and the DSP program will be
downloaded. When the download has been completed the
power supply settings indicated in the configuration file are
set and the user may hear some of the relays clicking. The
pull-down menus items such as number of samples and
sampling frequency will have been set to the default values
specified by the configuration file. The user is free to change
these at will. Once all the settings had been decided the user
can click Close to return to the main form.
Taking Samples
When the user clicks Sample the software will instruct the
Evaluation Board Controller to take the required number of
samples at the required frequency from the evaluation board.
These samples are then uploaded and displayed. An FFT and
Histogram are also calculated and displayed. If the user clicks
Cont Samp the software will repeat the process indefinitely
until the user clicks the button again. While the software is
continuously sampling data the other control buttons are
disabled.
Other Buttons
The Reset button will cause the Evaluation Board Controller
to perform a reset function. When this happens the power
supplies are turned off and the program in DSP memory is
lost. The user should repeat the setup instructions to down-
load another program if required.
The Quit button will exit the software, the program running
on the Evaluation Board Controller is not terminated.
MENU BAR ITEMS
The main screen of the Evaluation Board Controller contains
a number of options available as pull-down menu items. The
functions of these are listed below.
File Menu:
Setup Menu: Selecting this option displays the Setup Screen
as shown in Figure 3.
Load Raw Data: Selecting this option allows the user to load
data which had been saved by the software during a previous
session.
Save Raw Data: Selecting this option allows the user to save
the current set of sample data points. The data can be
reloaded to the Evaluation Board Controller software at a
later date or can be used by other programs for further
analysis
Save Binary Data: Selecting this option allows the user to
save the current set of sample data points. The data is saved
in binary format as a text file. This method can be useful for
examining code flicker, looking for stuck bits etc.
Save FFT Data: Selecting this option allows the user to save
the current set of FFT data points. FFT data cannot be
reloaded into the Evaluation Board Controller software but
can be loaded into other software packages for further
analysis.
Exit: Quits the program.
Printer Port:
This menu item allows the user to select which printer port
should be used for communication with the Evaluation Board
Controller.
LPT1: This option selects 0x378 as the printer port
address. This is the default option.
LPT2: This option selects 0x278 as the printer port
address.
PRN: This option selects 0x3BC as the printer port
address.
Help:
This menu item gives information about the current revision
of software for the particular evaluation board being used.
–8–
REV. 0