EVAL-AD7470CB Datasheet, PDF (7/14 Pages) Analog Devices – Evaluation Board for 10-bit high speed, low power, successive-approximation ADC

EVAL-AD7470CB
Figure 4. Main Screen
SOFTWARE DESCRIPTION
Included in the EVAL-AD7470CB evaluation board pack-
age is a PC-compatible disk. This disk has two sub-directo-
ries called EVAL_CTRL and HSC_INT, each containing
software for controlling and evaluating the performance of
the AD7470 when it is operated with the EVAL-CONTROL
BOARD or the HSC-INTERFACE BOARD. The EVAL-
AD7470CB Demonstration/Evaluation Software runs under
DOS 4.0 or later and requires a minimum of a 386-based
machine with 400kB of base RAM and 500kB of free hard
disk space. The user interface on the PC is a dedicated
program written especially for the AD7470.
The disk which accompanies the EVAL-AD7470CB con-
tains two sub-directories. The user should create a new
directory on the main PC drive and label this "AD7470".
Then, the sub-directories (and all files contained within
them) on the EVAL-AD7470CB disk should be copied into
this directory. The Mouse Driver on the PC should be
enabled before running the software. If this has not been
loaded, the program will not run.
To run the software, simply make the AD7470\EVAL_CTL
directory or the AD7470\HSC_INT directory (depending
on which setup is being used) the current directory and type
"go". When the evaluation program starts, the user sees the
screen shown on Figure 3 (without any FFT or scope
waveforms). This is the main screen and it is divided into
three parts. The top part provides the main control interface
for the AD7470 evaluation software. The middle part of the
main screen functions as a Digital Storage Oscilloscope and
the bottom part of the main screen operates as either a Digital
Spectrum Analyzer or a Histogram analyzer.
Each part of the screen has several buttons that can be pressed
by using the mouse or the keyboard. To press a button using
the mouse, simply use it to move the on-screen pointer to the
button to be activated and click. To use the keyboard, simply
press the appropriate key as highlighted on the button. Lower
case letters must be used. When a button is pressed, it is
highlighted on the screen. The next button can be high-
lighted by using the Tab key or the previous button by
holding down the shift key and the Tab key together. The
highlighted button can also be pressed by pressing the space
bar. Pressing the ESC key halts any operation currently in
progress. In this document, if a button can be activated from
the keyboard then the key used is shown in bold in the button
name. For example, "no prog" has the "p" highlighted in
bold, indicating that the button can be activated by pressing
the p key.
Some buttons have a red indicator. A red indicator on the
button means that the function associated with that button is
on. Absence of the red indicator light means that the function
associated with the button is off. The on/off status of these
buttons is changed simply by selecting the button.
Setting up the EVAL-CONTROL BOARD
When the software is run, the "F2 Setup" button in the top left
of the screen should be selected to pop up the setup menu (see
fig. 4). This menu sets up the EVAL-CONTROL BOARD
for use with the EVAL-AD7470CB.
Firstly, a configuration file must be chosen. The configura-
tion file contains the default configuration information for
the EVAL-CONTROL BOARD, the Digital Spectrum
Analyzer and the Digital Storage Oscilloscope. It also tells
the AD7470.EXE software which .HIP file to download to
the ADSP-2111. The .HIP file contains the DSP code which
is executed by the ADSP-2111. Normally, the "no prog"
button is off, so when the configuration file is loaded, the
.HIP file is automatically downloaded to the ADSP-2111.
However, if the "no prog" button is on, then the .HIP file is
not downloaded to the ADSP-2111.
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