EVAL-ADXRS800Z-RG

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 FEATURES 09113-001 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 Figure 1. Inertial Sensor Evaluation System GENERAL DESCRIPTION The ADXRS800 inertial sensor evaluation system is an easy-touse 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 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. 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. 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. 5. 6. 7. INSTALLATION PROCEDURE The following steps must be completed, in the order listed, to successfully set up and run the ADXRS800 evaluation system: 1. 2. 3. 4. This guide is designed to provide all the detail necessary to install and operate the ADXRS800 evaluation system. The EVAL-ADXRS800Z-M system contains the ISEB and the EVAL-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 PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Download all CD-ROM files to the PC hard drive. Install the USB drivers for the inertial sensor evaluation system (ISEB). Connect the ISEB hardware to the PC. Install the latest firmware revision into the ISEB hardware (included on the CD-ROM). Install the ADXRS800 evaluation system GUI. Configure the ISEB hardware. Launch the ADXRS800 evaluation system GUI and test devices. Rev. 0 | Page 1 of 16 UG-154 Evaluation Board User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Getting Started ...............................................................................8  General Description ......................................................................... 1  View and Record Data Panel .......................................................9  Installation Procedure.................................................................. 1  Temperature Test Panel ............................................................. 10  Revision History ............................................................................... 2  Noise and Root Allan Variance Panel ...................................... 11  Inertial Sensor Evaluation System Setup ....................................... 3  Turn-On Bias Stability Panel .................................................... 12  Downloading All Files to a PC ................................................... 3  Turn-On Bias Settling Panel ..................................................... 13  ISEB Hardware Setup ................................................................... 3  Sensitivity Check Panel.............................................................. 14  COM Port Verification ................................................................ 3  Alternate External High Voltage Supply ................................. 15  Installing the Latest ISEB Firmware........................................... 4  Header Pinout ................................................................................. 16  Hardware Configuration ............................................................. 7  Inertial Sensor Evaluation System Graphical User Interface ...... 8  REVISION HISTORY 3/11—Revision 0: Initial Version Rev. 0 | Page 2 of 16 Evaluation Board User Guide UG-154 INERTIAL SENSOR EVALUATION SYSTEM SETUP DOWNLOADING ALL FILES TO A PC 4. Select ADI Inertial Sensor Evaluation System from the model list (see Figure 4), and click Next to complete the process. Before proceeding with the installation routine, it is important to first download all files included on the ADXRS800 installation 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 are now ready to begin the installation routine. 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. 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: 2. 3. Execute the ADI_ISEB_USB_Drivers.exe file located in /ISEB_USB/. Follow the on-screen instructions to install the drivers. Click Continue Anyway when prompted that the drivers are not tested. 09113-003 1. 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. If prompted to install drivers again, click Install from a list or specific location (Advanced) (see Figure 2); then click Next. 09113-004 2. Figure 3. Selection of the Driver to Install Figure 4. Selection of the ADI Inertial Sensor Evaluation System Drivers COM PORT VERIFICATION 09113-002 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. Figure 2. Found New Hardware Prompt 3. Select Don’t search. I will choose the driver to install (see Figure 3), and click Next. Rev. 0 | Page 3 of 16 UG-154 Evaluation Board User Guide For Windows® Vista, For Windows XP/2000, 1. 1. Figure 5. Computer Properties 09113-007 4. 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. 09113-005 3. 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. 09113-006 2. From the Start menu, right click Computer and select Properties. The window shown in Figure 5 should open. 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. Expand the Ports (COM & LTP) menu item. ADI Inertial Sensor Evaluation System should be listed with an assigned COM port number in parenthesis. Note the COM port number for future use. Figure 6. Device Manager Showing the COM Port Number 2. Rev. 0 | Page 4 of 16 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. Run the ARMWSD.exe program located in the /ISEB_USB/FW/ folder; it displays information about the downloader, as shown in Figure 8. Evaluation Board User Guide UG-154 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: Figure 8. ISEB ARMWSD Firmware Downloader 3. 4. SW2 Figure 10. ISEB Switch Locations for Flashing the Microcontroller 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). 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). SW1 09113-109 09113-107 CONNECTOR ADuC7026 a. b. c. Press and hold down SW1. With SW1 held down, press and release SW2. Release SW1. The download begins and is automatically verified by the downloader. 2. 3. 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 reprogram the board successfully. 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. 09113-108 Installing the ADXRS800 Software Evaluation GUI 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). 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. Rev. 0 | Page 5 of 16 Evaluation Board User Guide 09113-011 09113-113 UG-154 Figure 13. Start Installation (Listing Varies Based on PC Requirements) Figure 11. ADXRS800 Evaluation Software Installation Welcome 2. 3. 4. 5. 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. When you finish selecting a directory, click Next. The National Instruments Software License Agreement is displayed. Read the license agreement before accepting it; then, click Next. The installer lists the required components to install on your PC (see Figure 13). 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. Click Finish to complete the installation. 09113-012 1. Figure 12. Destination Directory Selection Rev. 0 | Page 6 of 16 09113-014 From this point, complete the following steps to install the evaluation software: Figure 14. Installation Complete Evaluation Board User Guide UG-154 HARDWARE CONFIGURATION 5. To configure the hardware, follow these steps: 1. 2. 3. 4. If the hardware is not already connected, plug the USB A to Mini-B cable into the PC. Connect the ISEB to the USB cable. 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. 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. 6. 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. 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. CONNECTOR 09113-016 ANALOG DEVICES ADXRS800 SATELLITE Figure 16. Fully Assembled Evaluation Kit 09113-015 DEFAULT JUMPER POSITIONS Figure 15. Default Jumper Positions Rev. 0 | Page 7 of 16 UG-154 Evaluation Board User Guide INERTIAL SENSOR EVALUATION SYSTEM GRAPHICAL USER INTERFACE 09113-017 GETTING STARTED 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 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. 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. 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: At this point, the functionality of the GUI is completely deactivated. 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. 1. 2. 3. Rev. 0 | Page 8 of 16 Close the software GUI by clicking the QUIT PROGRAM or by selecting File/Exit. When the software GUI is closed, reset the ISEB evaluation board by pressing the reset button (SW2). Restart the software GUI. Evaluation Board User Guide UG-154 09113-018 VIEW AND RECORD DATA PANEL Figure 18. View and Record Data Panel Secondary information that is transmitted along with the plotted signals is graphically represented. This includes the fault register, sequence bits, status bits, and sensor module bits. This 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. 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. 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. Rev. 0 | Page 9 of 16 UG-154 Evaluation Board User Guide 09113-019 TEMPERATURE TEST PANEL 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. Rev. 0 | Page 10 of 16 Evaluation Board User Guide UG-154 09113-020 NOISE AND ROOT ALLAN VARIANCE PANEL Figure 20. Noise and Root Allan Variance Panel The software GUI includes the ability to calculate and plot the root Allan variance (RAV) of the ADXRS800. Root Allan variance can be approximately described as the variation of successive long-term averages of the null output of the ADXRS800. This is usually reported in units of degrees per hour and indicates the long-term bias stability of a gyroscope. To generate an accurate root Allan variance plot, it is recommended that this test be run (at least) overnight, during which time care should be taken to ensure that the device is in a temperature-stable, and disturbance-free environment. Any rotational rate input into the gyroscope can greatly degrade the validity of the resulting RAV plot. Determining the rms noise of the ADXRS800 can be done on this same panel. The evaluation GUI calculates the rms noise by taking the standard deviation of the specified number of points, which is roughly equivalent to the 1 sigma peak-to-peak noise value. These data points are obtained at a 500 Hz data rate. It is recommended that you perform this test with at least 16,000 data points to obtain accurate results. Fewer data points can be used, but the reported rms noise is then subject to higher variability. Rev. 0 | Page 11 of 16 UG-154 Evaluation Board User Guide 09113-021 TURN-ON BIAS STABILITY PANEL Figure 21. Turn-On Bias Stability Panel Another key performance characteristic of gyroscopes is their turn-on to turn-on bias stability, which determines the range of expected offset values between each power cycle that can be factored into the development of application specific algorithms. a file name for the data upon completion of the specified number of turn-on cycles or upon clicking the Stop Data Record button. While the test is running, the Min, Max, and Std Dev. boxes are updated upon the completion of each power cycle. The Turn-on Bias Stability panel allows you to adjust the supply voltage for this test to match the intended application voltage. To record the data from this panel, ensure that the Record Bias Run Data box is checked before clicking the View Turn-on Bias Stability button. You are then prompted to enter Like the root Allan variance procedure, it is recommended that this test be run for several hours and in a temperature-stable and disturbance-free environment. Any rotational motion applied to the gyro corrupts the results of this experiment. Rev. 0 | Page 12 of 16 Evaluation Board User Guide UG-154 09113-022 TURN-ON BIAS SETTLING PANEL Figure 22. Turn-On Bias Settling In addition to the bias stability from one power cycle to the next, it is important to understand the device behavior at the moment power is applied to the device. The recommended turn-on time for the ADXRS800 is 100 ms (typical), and it is not recommended that your applications try to obtain accurate rate data from the device within this period. However, if it is not possible to control the communications timings such that the application does not communicate with the device before 100 ms expires, this panel allows you to observe the turn-on behavior of the ADXRS800 for incorporation into your system’s algorithms. For this test panel, the first SPI message is typically received from the device within 20 ms after the ISEB supplies power to the satellite board. Additionally, if the device is rotated at a constant rate while power is applied, the Turn-on Bias Settling panel (see Figure 22) verifies that the conditions defined for the turn-on time are achieved; that is, after 100 ms (typical), the device output is within 1% or ½°/sec of the applied rotational rate, whichever comes first. Rev. 0 | Page 13 of 16 UG-154 Evaluation Board User Guide 09113-023 SENSITIVITY CHECK PANEL Figure 23. Sensitivity Check Panel The last panel (see Figure 23) provides a method for checking the approximate sensitivity of a given device. The data sheet specification for sensitivity is 80 ± 3% LSBs/°/sec. This panel is designed to use the nominal sensitivity to calculate the angle of rotation experienced by the satellite board. If you have access to a firmly rooted straight edge, you can use the Sensitivity Check panel as follows: 1. 2. Place a flat edge of the satellite board firmly against the desktop straight edge. Click the Perform Sensitivity Check button. Do not rotate the satellite board until instructed by the evaluation GUI. The software must perform an initial calibration step to accurately calculate the angle of rotation. 3. 4. After the null calibration is performed, slowly rotate the satellite board through 180° (90° can also be used). Because the satellite board is approximately square, as each adjacent side is brought flush with the straight edge, 90° of rotation will have been experienced. After the gyro graphic in the GUI rotates through 180°, the measurement stops. If you finish rotating the device before completion of the measurement, firmly hold the satellite board against the straight edge to ensure that no additional rotation is applied to the device. At the completion of the measurement, the angle through which the satellite board was rotated should appear in the GUI. This measurement should be considered approximate because error sources incurred during the angle integration can alter the results. Rev. 0 | Page 14 of 16 Evaluation Board User Guide UG-154 ALTERNATE EXTERNAL HIGH VOLTAGE SUPPLY As discussed in the COM Port Verification section, and shown again in Figure 24, the default jumper positions configure the part to use an on-board boost converter to generate a high voltage (approximately 24 V) input signal. This boost converter is supported through circuitry internal to the ADXRS800 and requires an external inductor and a diode for proper operation. See the ADXRS800 data sheet for a full description of the boost converter operation. The supply requirements are described in detail in the ADXRS800 data sheet. The main requirement for the external high voltage supply is that 0.1 mA to 1mA of current be supplied to the device. The nominal internal voltage is 22.5 V. As an example, assume that a 30 V supply is available in the end application. Then 22.5 V (typical) is required internally, and 30 V is available externally. For this condition, 7.5 V is dropped across the external resistor. To ensure that between 0.1 mA and 1 mA of current is sourced, a 12 kΩ resistor can be chosen. This sources 0.625 mA to the ADXRS800. You can then test the satellite board in exactly the same way as described throughout this user guide and be able to verify that your external supply meets the requirements of the ADXRS800, accounting for supply tolerances and temperature effects. CONNECTOR ANALOG DEVICES ADXRS800 SATELLITE ANALOG DEVICES ADXRS800 SATELLITE REMOVE JUMPER If the end application has an external high voltage supply available, and you want to omit the inductor and diode, you can modify the satellite board to accept this supply. Figure 25 shows the required jumper configuration when using an external high voltage supply. Additionally, a footprint for a through-hole resistor has been included. This resistor must be populated such that, when combined with the high voltage supply, the proper current is sourced to the ADXRS800. Rev. 0 | Page 15 of 16 EXTERNAL HV SUPPLY JUMPER POSITION POPULATE RESISTOR (APPLICATION SPECIFIC) Figure 25. Jumper Configuration for External High Voltage Supply 09113-025 Figure 24. Default Jumper Configuration CONNECTOR DO NOT POPULATE RESISTOR 09113-024 DEFAULT JUMPER POSITIONS UG-154 Evaluation Board User Guide HEADER PINOUT 3.3V CS2 P1 VS2 VS1 ST1 ST2 SCL1 SDA1 CLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 MOSI MISO CS3 CS4 S1 S2 S3 S4 CS2 VS2 VS1 ST1 ST2 SCL1 SDA1 CLK MOSI MISO CS3 CS4 GND 09113-013 AGND Figure 26. ISEB 20-Pin Header Pinout ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. 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