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Rev. A

EVAL-AD9835EB

SOFTWARE DESCRIPTION

The AD9835 evaluatmon board comes with a floppy disk

containing software that allows the user to control the

AD9835 from an IBM compatible PC. The PC is connected

to the evaluation board by a standard Centronics™ printer

cable.

Installing the Software:

The software will run on any IBM compatible PC which

meets the following requirements.

• Microsoft Windows 3.1 or Windows95 installed.

• 80386 or higher processor.

• At least 1.5 Mb of free hardisk space.

The software is distributed on a single 3.5 inch diskette. The

diskette contains all the files required to install and run the

software.

Using either the Program Manager or the File Manager the

user should select the floppy drive ( usually a:) and double

click on the SETUP.EXE file. This program simplifies the

installation of the software by copying the files from the

diskette to the relevant directories on the hard disk.

When the setup program is running the user will be prompted

to enter a destination directory for the software. A default

directory is given as C:\AD9835. When the software is

installed a Windows Group called Analog Devices will be

created (Windows 3.1 only) and the AD9835 icon will be

placed there. Double clicking on this icon will run the

evaluation software. Windows 95 users can navigate through

the directories using Windows Explorer and then double

click on the AD9835.EXE file to start the software.

The Evaluation Software

When the program starts it will check the PC BIOS to detect

the address of the printer port installed. There are three

possible base addresses at which a printer port can reside and

these are shown below together with the printer names.

PrinterBase Address (hex)

LPT1

0x378

LPT2

0x278

PRN1

0x3BC

If there is more than one printer port installed the software

will chose the first one it finds. It is possible to change the

printer port from the software by clicking the Select Port

button.

The main screen for the evaluaton board software is

shown in Fig. 3 below.

Figure 3: The Main Screen