EVAL-AD7482CB_15 Datasheet, PDF (8/20 Pages) Analog Devices – Evaluation Board for 3 MSPS, 12-Bit SAR ADC

EVAL-AD7482CB
EVALUATION BOARD SOFTWARE
Figure 3. The Setup Menu Dialog Box
SETUP MENU SCREEN
The Setup Menu dialog box is responsible for allowing the user
to load the required configuration file for the evaluation board
(see Figure 3). When the configuration file is loaded, the soft-
ware acquires detailed information about the evaluation board
and part connected to the EVAL-CONTROL BRD2 such as the
number of bits, maximum sampling rate, output coding, maxi-
mum analog input, and power supply requirements. The
configuration file also tells the software the name of the DSP
program file, which should download to the EVAL-CONTROL
BRD2. These files are supplied by Analog Devices with the
evaluation board.
SETTING UP THE EVAL-CONTROL BRD2
The EVAL-CONTROL BRD2 and the EVAL-7482CB should
be connected together via the 96-way connector. The power
should be applied to the EVAL-CONTROL BRD2. At this stage,
the red LED should be flashing which indicates that the EVAL-
CONTROL BRD2 is functional and ready to receive instructions.
The software (previously installed) should be loaded before the
printer port cable is connected between the EVAL-CONTROL
BRD2 and the PC. This ensures that the printer port has been
initialized correctly. The printer port cable can then be
connected between the PC and EVAL-CONTROL BRD2.
RUNNING THE SOFTWARE
With the hardware set up, the user is now in a position to use
the software to control the EVAL-CONTROL BRD2 and the
evaluation board. In the software screen, the user should select
the File menu and click Setup. This displays the Setup Menu
(see Figure 3). A window on the left of the setup form lists all
the available configuration files. The configuration files are
text-based files, which contain information about the particular
evaluation board to be tested. The information contained is
listed in the Setup Menu Screen section. Select the relevant
configuration file and click Load. In the case of the AD7482
evaluation board, only one configuration file is available:
ad7482.cfg. The EVAL-CONTROL BRD2 is reset and the
DSP program is downloaded. When the download is complete,
the power supply settings indicated in the configuration file are
set and the user may hear some of the relays clicking. The pull-
down menu items, such as Select No. Of Samples and Select
Sample Frequency, have been set to the default values specified
in the configuration file. The user is free to change these at will.
Once all the settings have been determined, the user can click
Close and return to the main screen.
SOFTWARE CONFIGURATION FILES
Software configuration files give the EVAL-CONTROL BRD2
software information on how the software and hardware should
perform. They contain information such as the name of the
DSP program to be downloaded, the default and maximum
sampling frequencies, the number of samples to take, and the
power supply settings to use. A typical Software Configuration
File (*.cfg) is shown in Listing 1.
Listing 1. Typical Configuration File
[EVAL-CONTROL BOARD]
partname:AD7482
programname:ad7482.PRG
samplefrequency:1200000
maxsamplefrequency:2200000
samples:2048
+/−15V:on
dvdd:5:on
avdd:5:on
bus:on
;options 2scomp, binary
dataformat:binary
numberofbits:12
inputVmax:2.5
inputVmin:0
[endofconfig]
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