Analog Devices ADXRS450 Manual de usuario

Evaluation Board User Guide

UG-260

One Technology Way •P. O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: 781.329.4700 •Fax: 781.461.3113 •www.analog.com

ADXRS450/ADXRS453 Sensor Evaluation System

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 20

FEATURES

Flexible inertial sensor evaluation platform

Single main board operates with interchangeable satellite

boards

Separates DUT from controller for accurate environmental

testing

500 Hz data rate SPI interface

Continuous stream to file data recording

Standard USB cable for power and communications

PC-based graphical user interface (GUI)

Fast, easy installation

09751-001

Figure 1. Inertial Sensor Evaluation System

GENERAL DESCRIPTION

The ADXRS450/ADXRS453 inertial sensor evaluation system is

an easy-to-use evaluation tool targeting bench or desktop

characterization of Analog Devices, Inc., inertial sensor products.

The system consists of the inertial sensor evaluation board (ISEB),

or main board, and satellite boards for several Analog Devices

inertial sensor products. The ISEB connects directly to a PC via

a USB cable, with the USB connection providing both power

and communications to the board. The ISEB is connected to the

satellite board through a ribbon cable. This cable allows the

satellite to be easily manipulated for testing or separately placed

into an environmental chamber for temperature or humidity

testing. Separating the boards mitigates corruption of data due

to the temperature and humidity effects of other components.

The ISEB is a universal main board and is intended to be used

with various satellites of Analog Devices inertial sensors, including

analog and digital accelerometers and gyroscopes. The different

products are evaluated by means of separate GUIs that are custom-

ized for performance and characterization measurements relevant

to the inertial sensor being evaluated.

The EVAL-ADXRS450Z-M/ADXRS453Z-M system contains

the ISEB and the EVAL-ADXRS450Z-S/ADXRS453Z-S satellite.

Also included is a USB A to Mini-B cable to connect the ISEB to

a PC and an 18-inch, 20-pin ribbon cable to connect the ISEB to

the satellite. A CD is included with the necessary drivers and

installers to use the system and to quickly begin evaluating the

ADXRS450/ADXRS453.

INSTALLATION PROCEDURE

The following steps must be completed, in the order listed, to

successfully set up and run the ADXRS450/ADXRS453

evaluation system:

1. Install required LabView™ engines.

2. Install the USB drivers for the inertial sensor evaluation

system (ISEB).

3. Connect the ISEB hardware to the PC.

4. Install the latest firmware revision into the ISEB hardware

(included on the CD-ROM).

5. Install the ADXRS450/ADXRS453 evaluation system GUI.

6. Configure the ISEB hardware.

7. Launch the ADXRS450/ADXRS453 evaluation system GUI

and test devices.

This guide is designed to provide all the detail necessary to install

and operate the ADXRS450/ADXRS453 evaluation system.

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TABLE OF CONTENTS

Features .............................................................................................. 1

General Description ......................................................................... 1

Installation Procedure...................................................................... 1

Revision History ............................................................................... 2

Inertial Sensor Evaluation System Setup....................................... 3

Downloading All Files to a PC ................................................... 3

Installing LabVIEW Files ............................................................ 3

ISEB Hardware Setup................................................................... 4

COM Port Verification ................................................................ 5

Installing the Latest ISEB Firmware........................................... 6

Hardware Configuration ............................................................. 7

Inertial Sensor Evaluation System Graphical User Interface.......9

Getting Started...............................................................................9

View and Record Data Panel .................................................... 10

Temperature Test Panel ............................................................. 11

Noise and Root Allan Variance Panel...................................... 12

Turn-On Bias Stability Panel .................................................... 13

Turn-On Bias Settling Panel ..................................................... 14

Sensitivity Check Panel.............................................................. 15

Alternate External High Voltage Supply ..................................... 16

Header Pinout................................................................................. 17

REVISION HISTORY

7/11—Revision 0: Initial Version

Evaluation Board User Guide UG-260

Rev. 0 | Page 3 of 20

INERTIAL SENSOR EVALUATION SYSTEM SETUP

DOWNLOADING ALL FILES TO A PC

Before proceeding with the installation routine, you may wish

to first download all files included on the Analog Devices Sensor

Eval CD-ROM to a local folder on the host PC. This may make

installation faster, and is a recommended troubleshooting step if

you are experiencing problems with installation. Otherwise, you

can install files directly from the CD-ROM. The steps in this user

guide assume you are working directly from the CD-ROM.

If you are able to run the Analog Devices ISEB system, you can

skip the LabVIEW and driver installation because these are

already installed, and proceed directly to the COM Port

Ver ification section.

INSTALLING LabVIEW FILES

The Inertial Sensor Evaluation GUI was developed using

LabVIEW and although the GUI is a standalone executable file,

it requires installation of the LabVIEW and VISA run-time

engines. Follow these steps for installation:

1. To run the software installation routine, double-click the

LabVIEW Run Time Install.exe file located in the

LabVIEW Run Time Installation folder on the included

CD. The window shown in Figure 2 is displayed.

Depending on your version of Windows®, you may be

prompted to allow the program to access your computer’s

settings.

09751-011

Figure 2. ADXRS450/ADXRS453 Evaluation Software Installation Welcome

2. Select the destination directory. The installer autopopulates

the names of the directories in which to store the software

GUI and required National Instruments products (see

Figure 3). You can change these directories; however, most

installations can proceed with the default values.

9751-012

Figure 3. Destination Directory Selection

3. When you finish selecting a directory, click Next. The

National Instruments Software License Agreement is

displayed.

4. Read the license agreement before accepting it; then, click

Next. The installer lists the required components to install

on your PC (see Figure 4).

09751-113

Figure 4. Start Installation (Listing Varies Based on PC Requirements)

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5. To start the installation, click Next. The installer completes

installation of the software evaluation GUI and all required

National Instruments drivers and run-time engines. After

the installation is complete, the box shown in Figure 5 is

displayed.

9751-014

Figure 5. Installation Complete

6. Click Finish to complete the installation. Reboot your

computer if prompted.

ISEB HARDWARE SETUP

Before connecting the ISEB hardware to the PC via the included

USB cable, drivers must be installed so that the PC properly

recognizes the ISEB main board. The USB drivers for the ISEB

are available in the /ISEB_USB/ folder on the packaged CD.

Installing the USB Drivers for the ISEB

To install the USB drivers, follow these steps:

1. Open the /ISEB_USB/ folder and locate the appropriate

folder for your operating system. If running Windows 7,

follow the instructions at /ISEB_USB/ADI_ISEB_Win7/.

For other versions of Windows (2000, XP, or Vista),

execute the ADI_ISEB_USB_Drivers.exe file located in

/ISEB_USB/ADI_ISEB_XP_Vista_2000/ and continue to

Step 2.

2. Follow the on-screen instructions to install the drivers.

3. Click Continue Anyway when prompted that the drivers

are not tested.

After the preceding steps are complete, you can connect the

ISEB main board to the computer via the included USB cable. If

the previously installed drivers are not automatically associated

with the device, you may need to select the drivers manually, as

follows:

1. Connect the USB A to Mini-B cable to the PC and then to

the ISEB. The satellite board does not need to be connected

for this step. New hardware is detected upon completion of

this step.

2. If prompted to install drivers again, click Install from a list or

specific location (Advanced) (see Figure 6); then click Next.

09751-002

Figure 6. Found New Hardware Prompt

3. Select Don’t search. I will choose the driver to install (see

Figure 7), and click Next.

09751-003

Figure 7. Selection of the Driver to Install

4. Select ADI Inertial Sensor Evaluation System from the

model list (see Figure 8), and click Next to complete the

process.

09751-004

Figure 8. Selection of the ADI Inertial Sensor Evaluation System Drivers

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The ISEB should be detected automatically in the Device

Manager as the ADI Inertial Sensor Evaluation System under

the Ports (COM & LPT) selection. It is recommended to open

the Device Manager to verify hardware detection and to record the

communication port associated with the ISEB for use in the GUI.

COM PORT VERIFICATION

Installing the latest firmware revision, as well as operating the

ADXRS450/ADXRS453 evaluation GUI, requires that you know

which communications port is assigned to the ISEB main

board. With the ISEB main board connected to the PC, perform

the following steps in the Windows Vista section, the Windows

XP/Windows 2000 section, or the Windows 7 section

(depending on your system) to determine the assigned COM

port number.

Windows Vista

1. From the Start menu, right click Computer and select

Properties. The window shown in Figure 9 should open.

2. Underneath Tasks, select Device Manager. Windows Vista

may request that you allow access to this panel, and

administrative privileges may also be required. The

window shown in Figure 10 should now open.

3. Expand the Ports (COM & LTP) list item. ADI Inertial

Sensor Evaluation System should be listed with an

assigned COM port number in parentheses.

4. Note the COM port number for future use.

9751-005

Figure 9. Computer Properties

09751-006

Figure 10. Device Manager Showing the COM Port Number

Windows XP/Windows 2000

1. From the Start menu, right click My Computer and select

Properties.

2. Click the Hardware tab of the System Properties window,

as shown in Figure 11.

3. Select Device Manager to look up the assigned COM port

of the ISEB hardware.

The Device Manager window should look like the window

shown in Figure 10.

09751-007

Figure 11. Windows XP/Windows 2000 System Properties

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Windows 7

1. From the Start menu, right click My Computer and select

Properties.

2. In the upper left corner of the window that opens, select

Device Manager, shown in Figure 12. Windows 7 may

request that you allow access to this panel.

3. Select Device Manager to look up the assigned COM port

of the ISEB hardware.

The Device Manager window should look like the window

shown in Figure 10.

09751-207

Figure 12. Windows 7 System Properties

INSTALLING THE LATEST ISEB FIRMWARE

The latest ISEB firmware is included on the installation CD. To

successfully use the ISEB evaluation hardware, this firmware

must be flashed to the ISEB controller. The installation CD

contains the firmware itself and the utility that allows you to flash a

new version of the firmware onto the ISEB microcontroller. In

addition, as new firmware is made available, it can be downloaded

from the Analog Devices website (http://www.analog.com/iseb).

To flash the ISEB microcontroller, follow these steps:

1. Ensure that the ISEB is connected to and detected by the

PC. The COM port on which the device is recognized

must also be obtained, as mentioned in the COM Port

Ver ification section.

2. Run the ARMWSD.exe program located in the /Firmware

Utility/ folder on the CD. This is the GUI for loading

firmware onto the microcontroller; a screenshot is shown

in Figure 13.

9751-107

Figure 13. ISEB ARMWSD Firmware Downloader

3. Click Browse… and find the /Firmware Utility/ folder on

the CD. Select the ADXRS450 - ADXRS800 -

Firmware.hex file and click Open.

4. Click Configure to display the box shown in Figure 14.

The downloader file should be configured for the ADuC7026

microcontroller on the ISEB. The only option you may need to

change is the COM port. You can select the correct port from

the Serial Port menu on the Comms tab (see Figure 14).

9751-108

Figure 14. Selecting the Correct COM Port for the Downloader

When the COM port is selected, click OK to accept the changes

and go back to the ARMWSD window (shown in Figure 13).

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When the ISEB is connected, the correct firmware is selected,

and the downloader is fully configured, follow these steps to

flash the firmware:

1. Click Start in the ARMWSD box (see Figure 13) to initiate

the flashing process. Press the two buttons (shown in

Figure 15) on the ISEB in the following order to flash the

firmware:

a. Press and hold down SW1.

b. With SW1 held down, press and release SW2.

c. Release SW1.

ADuC7026

CONNECTOR

SW1 SW2

09751-109

Figure 15. ISEB Switch Locations for Flashing the Microcontroller

The download begins and is automatically verified by the

downloader.

2. If the downloading process fails, which is indicated in the

Monitor Status box (see Figure 13), attempt the download

again by clicking Start and then pressing the switch

combination in Step 1. It may take a few attempts to

reprogram the board successfully. Ensure that the cables

and boards are stationary during programming to prevent

loose connections.

3. After the download has completed successfully, click Run

(as shown in Figure 13) to reset the ISEB and to begin

running the new firmware. When this step is complete, the

board is updated correctly.

Updating the firmware may require that a new evaluation GUI

be obtained. If the firmware on the CD is used to flash the ISEB,

the evaluation GUI on the corresponding CD is sufficient. If the

firmware used is obtained from the Analog Devices website

(http://www.analog.com/iseb), the most recent version of the

evaluation GUI, which is also located on the Analog Devices

website, should be used.

Installing the ADXRS450/ADXRS453 Software

Evaluation GUI

With all the drivers and firmware in place, follow these steps to

install the evaluation GUI.

1. Browse to /ADXRS450/ADXRS450 Eval Software

Installation/ on the CD and double-click on ADXRS450

Install.exe. Depending on your Windows settings, you may

be prompted to allow the program access to your computer.

The window that opens will be similar to Figure 3.

2. Follow the on-screen instructions to install the GUI.

The installer will place the GUI in your Start Menu under

Analog Devices – Inertial Sensor Eval. If you install or

have installed other inertial sensor evaluation GUIs, they

will also be in this folder, identified by the corresponding

part number.

HARDWARE CONFIGURATION

To configure the hardware, follow these steps:

1. If the hardware is not already connected, plug the USB A to

Mini-B cable into the PC.

2. Connect the ISEB to the USB cable.

3. If prompted to install the device, see the Downloading All

Files to a PC section for details on how to install and select

the correct driver.

4. Ensure that the jumpers on the ADXRS450/ADXRS453

satellite are in their default configuration, as shown in

Figure 16. This sets up the board to use the on-board boost

converter to generate the required high voltage supply for

the device. For more information on using alternate high

voltage supplies, see the ADXRS450 and ADXRS453 data

sheets and the Alternate External High Voltage Supply

section of this guide.

ANALOG DEVICES

ADXRS450/ADXRS453 SATELLITE

DEFAULT

JUMPER

POSITIONS

CONNECTOR

09751-015

Figure 16. Default Jumper Positions

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5. Connect the ISEB to the ADXRS450/ADXRS453 satellite

using the 18-inch, 20-pin ribbon cable. This cable is keyed

to prevent inserting it backward and causing damage to the

system.

09751-016

6. Connect the ADXRS450/ADXRS453 satellite to the opposite

end of the ribbon cable.

The inertial sensor evaluation system should now be set up and

ready to use and should resemble the setup shown in Figure 17.

Figure 17. Fully Assembled Evaluation Kit

Evaluation Board User Guide UG-260

Rev. 0 | Page 9 of 20

INERTIAL SENSOR EVALUATION SYSTEM GRAPHICAL USER INTERFACE

The following sections describe the operation of the GUI and the specific purpose of each of its six panels.

09751-017

Figure 18. ADXRS450/ADXRS453 Evaluation GUI Startup

GETTING STARTED

Before running the software evaluation GUI, it is a good idea to

reset the ISEB by pressing the SW2 button described in the

Installing the Latest ISEB Firmware section. This removes any

errors that may be lingering due to an improper shutdown or

disconnection from the PC.

After completion of the software GUI installation routine, a

shortcut to launch the executable file is added to the Start

menu. To launch the evaluation GUI, click Start, then All

Programs, Analog Devices – Inertial Sensor Eval, ADXRS450

Evaluation Software, and finally ADXRS450 Eval. A window

similar to the one shown in Figure 18 is displayed.

At this point, the functionality of the GUI is completely deac-

tivated. Before testing any devices, you must associate the

software GUI with the previously installed hardware via the

COM port. Follow the instructions in the COM Port

Ver ification section to determine which COM port is assigned

to the Analog Devices Inertial Sensor Evaluation System. Select

this COM port from the drop-down list, and click Confirm

COM to begin using the GUI.

After the COM port is confirmed, the full functionality of the

software evaluation GUI is available for you to use. You can exit

the GUI at any time by clicking QUIT PROGRAM located in the

lower right of the start-up window.

Troubleshooting

If the ISEB board and the software evaluation GUI do not

appear to be properly communicating, perform the following

reset routine:

1. Close the software GUI by clicking QUIT PROGRAM or

by selecting File/Exit.

2. When the software GUI is closed, reset the ISEB evaluation

board by pressing the reset button (SW2).

3. Restart the software GUI.

Note that you should not press the reset button (SW2) while the

GUI is running. This causes the ISEB and the software GUI to

disconnect from each other and causes the evaluation system to

no longer function properly.

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VIEW AND RECORD DATA PANEL

09751-018

Figure 19. View and Record Data Panel

The View and Record Data panel is the primary panel for

interacting with the device. The drop-down box, located

beneath the graph, contains the following three options:

Do Nothing (the default option)

View Gyro Signals

Record Gyro Signals

Clicking View Gyro Signals obtains the rateout signal, filtered

self-test, raw self-test, and quadrature information from the

device and plots all four signals simultaneously. As indicated by

the GUI, the data rate at which this information is obtained is

500 Hz ± 5%. The data rate is hardware controlled so that it

remains constant regardless of the priority and processor load

assigned to the software GUI by the operating system. For more

information on the significance of the plotted signals, see the

ADXRS450 and ADXRS453 data sheets.

Clicking Record Gyro Signals performs the same basic

function as View Gyro Signals; however, it allows you to

continuously stream the data to a .txt file. This is useful for

recording the response of the part during short term events of

less than ~2 minutes. This also ensures that the resulting data

file is manageable across most data analysis software packages.

You can perform the record functionality indefinitely.

Secondary information that is transmitted along with the

plotted signals is graphically represented. This includes the fault

This information is described in detail in the ADXRS450 and

ADXRS453 data sheets. This information is also recorded along

with the plotted signals when you select Record Gyro Signals.

Additional functionality on this panel includes the ability to

change the supply voltage, read the device ID and serial

number, read the individual memory registers, and perform

offset adjustments to zero out any residual offset. These

options encompass the majority of the functionality of the

ADXRS450/ADXRS453 gyroscope.

Adjusting the Supply Voltage

The ADXRS450/ADXRS453 are designed to operate over the

full voltage range of 3.3 V to 5 V (±5%). The device is designed

to offer equivalent performance regardless of the voltage level

available in the application. The numeric control allows you to

adjust the voltage to reflect the voltage level available in your

application. Clicking the Set button in the Supply Voltage

Adjust box updates the voltage supplied to the ADXRS450/

ADXRS453 satellite board. The Voltage Readback box accu-

rately displays the satellite supply voltage, which may be slightly

different from the value in the numeric control.

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