Analog Devices ADXRS800 Manual de usuario

Evaluation Board User Guide

UG-154

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

ADXRS800 Sensor Evaluation System

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS.Rev. 0 | Page 1 of 16

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

09113-001

Figure 1. Inertial Sensor Evaluation System

GENERAL DESCRIPTION

The ADXRS800 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 a satellite board for any Analog Devices inertial sensor

product. The ISEB connects directly to a PC via a USB cable,

with the USB connection providing both power and commun-

ications 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

customized for performance and characterization measurements

relevant to the inertial sensor being evaluated.

The EVAL-ADXRS800Z-M system contains the ISEB and the

E VA L-ADXRS800Z-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 ADXRS800.

INSTALLATION PROCEDURE

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

successfully set up and run the ADXRS800 evaluation system:

1. Download all CD-ROM files to the PC hard drive.

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 ADXRS800 evaluation system GUI.

6. Configure the ISEB hardware.

7. Launch the ADXRS800 evaluation system GUI and test

devices.

This guide is designed to provide all the detail necessary to

install and operate the ADXRS800 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

ISEB Hardware Setup................................................................... 3

COM Port Verification ................................................................ 3

Installing the Latest ISEB Firmware........................................... 4

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

Inertial Sensor Evaluation System Graphical User Interface...... 8

Getting Started...............................................................................8

View and Record Data Panel .......................................................9

Temperature Test Panel ............................................................. 10

Noise and Root Allan Variance Panel...................................... 11

Turn-On Bias Stability Panel .................................................... 12

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

Sensitivity Check Panel.............................................................. 14

Alternate External High Voltage Supply ................................. 15

Header Pinout................................................................................. 16

REVISION HISTORY

3/11—Revision 0: Initial Version

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INERTIAL SENSOR EVALUATION SYSTEM SETUP

DOWNLOADING ALL FILES TO A PC

Before proceeding with the installation routine, it is important

to first download all files included on the ADXRS800 install-

ation CD-ROM to a local folder on the host PC. Browse to a

destination directory on the host PC and right click to select

New/Folder. Name this folder, and copy the CD-ROM files into

this new location. You ar e now ready to begin the installation

routine.

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. Execute the ADI_ISEB_USB_Drivers.exe file located in

/ISEB_USB/.

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

3. Click Continue Anyway when prompted that the drivers

are not tested.

After the above 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 2); then click

Next.

09113-002

Figure 2. Found New Hardware Prompt

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

Figure 3), and click Next.

4. Select ADI Inertial Sensor Evaluation System from the

model list (see Figure 4), and click Next to complete the

process.

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.

09113-003

Figure 3. Selection of the Driver to Install

09113-004

Figure 4. Selection of the ADI Inertial Sensor Evaluation System Drivers

COM PORT VERIFICATION

Installing the latest firmware revision, as well as operating the

ADXRS800 evaluation GUI, requires that you know the

communications port that is assigned to the ISEB main board.

With the ISEB main board connected to the PC, you should

perform the following steps to determine the assigned COM

port number.

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For Windows® Vista,

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

Properties. The window shown in Figure 5 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 6 should now open.

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

Sensor Evaluation System should be listed with an

assigned COM port number in parenthesis.

4. Note the COM port number for future use.

09113-005

Figure 5. Computer Properties

09113-006

Figure 6. Device Manager Showing the COM Port Number

For Windows XP/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 7.

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 6.

09113-007

Figure 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 (www.analog.com).

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 Verification

section.

2. Run the ARMWSD.exe program located in the

/ISEB_USB/FW/ folder; it displays information about the

downloader, as shown in Figure 8.

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09113-107

Figure 8. ISEB ARMWSD Firmware Downloader

3. Click Browse… and select the ADI_ISEB_FW_2_0.hex

file located in the /ISEB_USB/FW/ folder or the most

recent firmware obtained from the Analog Devices website

(www.analog.com).

4. Click Configure to display the box shown in Figure 9.

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 9).

09113-108

Figure 9. 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 box (shown in Figure 8).

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 8) to initiate

the flashing process. After clicking Start, click the two

buttons (shown in Figure 10) on the ISEB in the following

order to flash the firmware:

ADuC7026

CONNECTOR

SW1 SW2

09113-109

Figure 10. ISEB Switch Locations for Flashing the Microcontroller

a. Press and hold down SW1.

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

c. Release SW1.

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 8), attempt the download

again by clicking Start and then pressing the appropriate

switch combination. It may take a few attempts to reprog-

ram the board successfully.

3. After the download has completed successfully, click Run

(as shown in Figure 8) 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

(www.analog.com), the most recent version of the evaluation

GUI, which is also located on the website, should be used.

Installing the ADXRS800 Software Evaluation GUI

The software GUI installation has been created to include any

required National Instruments drivers and run-time engines

that are necessary for proper operation. To run the software

GUI installation routine, double-click the setup.exe file located

in the /ADXRS800 Evaluation Software/ folder on the

included CD. The window shown in Figure 11 is displayed.

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09113-011

Figure 11. ADXRS800 Evaluation Software Installation Welcome

From this point, complete the following steps to install the

evaluation software:

1. 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 12). You can change these directories; however,

most installations can proceed with the default values.

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

National Instruments Software License Agreement is

displayed.

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

Next. The installer lists the required components to install

on your PC (see Figure 13).

4. 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 14 is

displayed.

5. Click Finish to complete the installation.

09113-012

Figure 12. Destination Directory Selection

09113-113

Figure 13. Start Installation (Listing Varies Based on PC Requirements)

09113-014

Figure 14. Installation Complete

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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 ADXRS800 satellite are in

their default configuration, as shown in Figure 15. 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 ADXRS800 data sheet and the Alternate

External High Voltage Supply section of this guide.

ANALOG DEVICES

ADXRS800 SATELLITE

DEFAULT

JUMPER

POSITIONS

CONNECTOR

09113-015

Figure 15. Default Jumper Positions

5. Connect the ISEB to the ADXRS800 satellite using the

18-inch, 20-pin ribbon cable. This cable is keyed to prevent

inserting it backward and causing damage to the system.

6. Connect the ADXRS800 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 16.

09113-016

Figure 16. Fully Assembled Evaluation Kit

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INERTIAL SENSOR EVALUATION SYSTEM GRAPHICAL USER INTERFACE

GETTING STARTED

09113-017

Figure 17. ADXRS800 Evaluation GUI Startup

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 is added to the Start menu. To

launch the evaluation GUI, click Start/All Programs/ADXRS800

Evaluation Software/ADXRS800 Eval. A window similar to

the one shown in Figure 17 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 through

the COM port. See PC Device Manager under the Ports (COM

& LTP) submenu to determine which COM port is assigned to

the Analog Devices inertial sensor evaluation system. Select this

COM port from the drop-down menu, 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. The

following sections describe the purpose of each panel of the

GUI. You can exit the GUI at any time by clicking QUIT

PROGRAM located in the lower right of the startup window.

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

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

lose sync and also causes the evaluation system to no longer

function properly. Additionally, if for any reason the ISEB board

and the software evaluation GUI do not appear to be properly

communicating, you should perform the following reset

routine:

1. Close the software GUI by clicking the 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.

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VIEW AND RECORD DATA PANEL

09113-018

Figure 18. 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 ADXRS800 data sheet.

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

information is described in detail in the ADXRS800 data sheet.

This information is also recorded alongside 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 ADXRS800

gyroscope.

Adjusting the Supply Voltage

The ADXRS800 is 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 updates the voltage supplied to the

ADXRS800 satellite board. The Voltage Readback field

accurately displays the satellite supply voltage, which may be

slightly different from the value in the numeric control.

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TEMPERATURE TEST PANEL

09113-019

Figure 19. Temperature Test Panel

The Temperature Test panel is designed to let you easily

perform long-term testing at a reduced bandwidth and data

rate. The panel is specifically designed for temperature testing,

with the on-board temperature sensor output plotted alongside

the device rateout, filtered self-test, and quadrature. Each data

point comprises an average of 250 samples, gathered at a 500 Hz

data rate, resulting in a 2 Hz data rate from the device. You can

view and record this information in much the same way as on

the View and Record panel. Data is, again, streamed to a file to

allow for an indefinite length for data recording.

Before recording the data on this panel, you can adjust for null

offset components. Note that any offset correction made to the

ADXRS800 is stored in the device EEPROM indefinitely or

until overwritten with a subsequent correction value. Any null

offset corrections made on the View and Record Data panel

persist throughout the evaluation GUI system even when the

device is power cycled.

Supplemental information, including the fault register, sequence

bits, and status bits, is graphically displayed and recorded in

addition to the plotted information you choose to record.

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