Software Operation; Configuration Tab - Analog Devices EVAL-AD7124-4SDZ User Manual

UG-855
Launching the Software
After completing the steps in the Setting Up the System for Data
Capture section, launch the AD7124-4 EVAL+ Software
follows:
1. From the Start menu, click Programs > Analog Devices >
AD7124 Eval+ > AD7124 Eval+. The dialog box in
Figure 19 appears; select EVAL-AD7124-4SDZ, and the
main window of the software then displays as shown in
Figure 20.
2. If the AD7124-4 evaluation system is not connected to the
USB port via the EVAL-SDP-CB1Z
launched, a connectivity error displays (see Figure 16).
Connect the evaluation board to the USB port of the PC,
wait a few seconds, click Rescan, and then follow the on-
screen instructions.
Figure 16. Connectivity Error Alert
When the software starts running, it searches for hardware
connected to the PC. A dialog box indicates when the generic
SDP attached to the PC is detected, and then the main window
appears (see Figure 20). Press the RESET button on the SDP
board, as shown in Figure 17.
Figure 17. SDP Connectivity Board—RESET Button
Pressing the RESET button causes the software to rescan for a
connected SDP board. If found, the message shown in Figure 18
displays.
Figure 18. Connectivity when SDP and Evaluation Boards are Found
as
when the software is
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EVAL-AD7124-4SDZ User Guide

SOFTWARE OPERATION

Overview of the Main Window
The evaluation software supports both the
AD7124-8 devices. On running the software, the user selects the
evaluation board that is connected to the PC. For the AD7124-4,
select EVAL-AD7124-4SDZ from the drop-down list, as shown
in Figure 19.
Figure 19. EVAL-AD7124-4SDZ
After selecting the EVAL-AD7124-4SDZ
main window of the evaluation software displays, as shown in
Figure 20. Figure 20 shows the significant control buttons and
analysis indicators of the AD7124-4 EVAL+
window of the AD7124-4 EVAL+ Software

Configuration

Waveform

Histogram

Register Map

CONFIGURATION TAB

The Configuration tab shows a block diagram of the AD7124-4.
It allows the user to set up the ADC, reset the ADC, read the
diagnostics to see errors present, as well as configure the device
for different demo modes. Figure 20 shows the Configuration
tab in more detail, and the following sections discuss the different
elements on the Configuration tab of the software window.
ADC Reset
Click ADC RESET (Label 2) to perform a software reset of the
AD7124-4. There is no hardware reset pin on the AD7124-4. A
hard reset can be performed by removing power to the board.
The software reset has the same effect as a hard reset.
Selecting External Reference
There are a number of different options that can be used when
selecting the reference to the AD7124-4. Two options are AVdd
and Refin1(+/-) (Label 3). The Refin1(+/-). field sets the
external reference voltage that is connected between REFIN1(+)
and REFIN1(−). Using the EVAL-AD7124-4SDZ
board, the AV voltage is 3.3 V. Either of these can be used in
DD
calculating the results on the Waveform and Histogram tabs.
The evaluation board has an external 2.5 V
which can be bypassed; if bypassing the
sure to change the external reference voltage value in Refin1(+/-)
to ensure correct calculation of results in the Waveform and
Histogram tabs.
AD7124-4 and the
Evaluation Board Selection
evaluation board, the
Software. The main
contains four tabs:
evaluation
ADR4525 reference,
ADR4525 on board, be