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This version (08 Oct 2013 03:42) was approved by NevadaMark.The Previously approved version (19 Nov 2012 16:42) is available.Diff

ADIS16375 EVALUATION ON THE ADISUSB

OVERVIEW

The ADIS16375 iSensor® is a complete inertial system that includes a triaxis gyroscope and triaxis accelerometer. Each sensor in the ADIS16375 combines industry-leading iMEMS® technology with signal conditioning that optimizes dynamic performance. The factory calibration characterizes each sensor for sensitivity, bias, alignment, and linear acceleration (gyro bias). As a result, each sensor has its own dynamic compensation formulas that provide accurate sensor measurements over a temperature range of −40°C to +105°C.

The ADIS16375 provides a simple, cost-effective method for integrating accurate, multiaxis, inertial sensing into industrial systems, especially when compared with the complexity and investment associated with discrete designs. All necessary motion testing and calibration are part of the production process at the factory, greatly reducing system integration time. The SPI port typically connects to a compatible port on an embedded processor, using the connection diagram below. The four SPI signals facilitate synchronous, serial data communication. Connect RST to a digital I/O line for remote reset control or leave it open for normal operation. The factory default configuration provides users with a data-ready signal on the DIO2 pin, which pulses high when new data is available in the output data registers.

ADIS16375/PCB BREAKOUT BOARD

For those who are on a tight timeline, connecting the ADIS16375 to an embedded controller will provide the most flexibility in developing application firmware and will more closely reflect the final system design. The ADIS16375/PCBZ is the breakout board for the ADIS16375 and may provide assistance in the process of hooking it up to an existing embedded processor system.

ADISUSB: PC EVALUATION

For those who would prefer to perform PC-based evaluation of the ADIS16375, before developing their own embedded system, the ADISUSB is the appropriate system to use. The remainder of this Wiki site will focus on PC-based evaluation with the ADISUSB system.

EQUIPMENT LIST

SYSTEM REQUIREMENTS

Windows XP, Vista, 7 (32-bit systems only)

NOTE: All the required files are contained in the .Cab file and deployed during software package install.

PHYSICAL SETUP

The ADIS16375/PCBZ includes one interface PCB, 4 M2x.4x18mm machine screws and one ADIS16375AMLZ unit. The ADIS16375 is approximately 44 mm × 47 mm × 14 mm and provides a flexible connector interface that enables multiple mounting orientation options. Set the interface PCB aside, as it is not used for connecting the ADIS16375AMLZ to the ADISUSB.

NOTE: Do not plug the ADISUSB into the USB cable at this stage of the setup. Wait until the software installation is complete.

Step #1

The ADIS16375AMLZ installs directly into the J4 connector of the ADISUSB. The following pictures provide a visual reference for correct connection. Mounting to the system frame is accomplished by Drilling and tapping for M2 (drill size #52 1.6mm) or 2-56 (drill size #50 .070) holes in the ADISUSB, according to the locations in the physical mounting diagram. The tap is the best way but an M2x0.4 machine screw can be used for tapping the PCB material. The ADIS16375AMLZ is secured using the M2x0.4x18mm machine screws included with the ADIS16375/PCBZ. The mounting location holes are shown in the picture below.

WARNING: Make sure that the connector is in proper alignment before pressing it in. Misalignment can cause pin damage and exposure to harmful conditions.

Step #2

The remote mounting option ADIS16375/PCBZ includes one ADIS16375AMLZ, one interface printed circuit board (PCB), and four M2 × 0.4 x 18mm machine screws. The interface PCB provides larger connectors than the ADIS16375AMLZ for simpler prototyping, four-tapped M2 holes for attachment of the ADIS16375AMLZ, and four holes (machine screw size M2.5 or #4) for mounting the ADIS16375AMLZ to a solid structure. J1 is a dual-row, 2 mm (pitch) connector that mates to a number of ribbon cable systems, including 3M Part Number 152212-0100-GB (ribbon crimp connector) and 3M Part Number 3625/12 (ribbon cable). Note that J1 has 16 pads; however, some legacy boards use only Pin 1 through Pin 12.

Step #3

Secure the ADIS16375AMLZ body, to the ADIS16375/PCBZ using (4) M2x0.4x18mm machine screws (included with ADIS16375/PCBZ). The suggested torque setting for the attachment hardware is 40 inch-ounces, or 0.2825 N-m.

Step #4

Connect J1 on the ADISUSB to J1 on the ADIS16375/PCBZ. Note that J1 (ADISUSB) has 12 pins and J1 (ADIS16375/PCBZ) has 16 pins. The four DIO pins are left un-connected using the 12 pin connector which allows easy access and shown in the pictures below.

Step #5

The following picture (left side) shows JP1 in the +3.3V position (factory-default). Change the JP1 jumper setting on the ADISUSB to the +5V position (shown on the right) required for the ADIS16375AMLZ.

ADIS16375 Evaluation SOFTWARE

Click here to download the ADIS16375 Evaluation Software to a personal computer, which enables PC-based evaluation of the ADIS16375 on an ADISUSB evaluation system. The download file will contain five separate files: The CAB file (ADIS16375_Rev_3.cab), the setup file (setup.exe), 375ES(3).zip, support and the setup list. Copy these files to a convenient folder for running the application from.

Navigate to the folder where the files were saved and double click the setup.exe file. The following pictures are a guide for the ADIS16375 Evaluation Software install. The Welcome screen will appear click OK to continue.

Please choose a directory for the software application or use the default settings (recommended) and click the computer icon button to go to the next step.

Choose a program group or use the default settings (recommended) and click Continue. The last picture confirms completion click OK to finish.

USB Driver Installation

The ADIS16375_Rev_3.cab file contains USB drivers that are compatible with both 32-bit and 64-bit Windows systems. The drivers are unpacked the same time the software application is loaded by double clicking the setup.exe file. The first time the ADISUSB board is plugged into the computer (using the included USB mini cable) the hardware is recognized and loaded. The computer Hardware Wizard will find and install the drivers by following the steps below.

The following pictures show the final steps for USB driver install. Click on Next then click on Finish completing the installation.

WARNING: For those who are using Windows XP, Service Pack 3, additional steps are required for completing the driver installation. Please see page 8, on the ADISUSB User Guide (UG-363) for additional information on these steps.

Main Window

Once the ADIS16375 Evaluation Software starts-up, the Main Window will appear and look like the following picture. The second picture provides color-coded boxes to support further discussion of each function in this screen.

The orange box identifies the drop-down menus, which provide a number of useful features.

The Registers option provides a listing of user-configurable registers in the ADIS16375 and also provides read/write access to each one of these registers.

The Datalog option provides the core data collection function.

The purple box identifies the output registers, which update, real-time, after pressing the Read button (see the red box for the location of the Read button).

The yellow box identifies the two waveform recorder windows. The top window contains the three gyroscope outputs. The bottom window contains the three accelerometer responses. Also, each waveform matches the color of its register (see register titles in the purple box).

Register Access

The purpose of the Register Access window is to provide both read and write access to the user registers in the ADIS16375. The following picture shows the appearance of this window.

The color coded boxes illustrate the different functions that this window provides.

The purple box identifies the register category. In addition to the Control/Status, this drop-down control offers access to Output and Calibration registers.

The red box identifies all of the registers that are in the current category. Click on the register name to select a register for individual read/write access.

The green box identifies the read/write control options for the current register selection. Use the hexadecimal format when writing commands to a particular register.

The yellow box updates all the registers in the current category.

The Update Flash command saves writable user register data.

APPLICATION TIP: The Register Access screen writes to user control registers, inside of the ADIS16375, two bytes at a time. So, when configuring a register, make sure to include the hexadecimal number for all 16-bits, before pressing the Write Register button. When using an embedded processor to write to user control registers, inside of the ADIS16375, each command (16-bits) writes to one byte at a time.

Data Capture Menu

The Data Capture function supports synchronous data acquisition, based on the data-ready signal from the ADIS16375. The following picture represents the Data Capture window, right after opening it from the Main Window and the second picture provides color-coded boxes, in order to support further discussion of each function that is associated with this screen.

The red box identifies all of the registers that are eligible for inclusion in the next acquisition process. Click on each box to include a register in the next data acquisition sequence. The box will have a check mark when it has been selected.

The green box identifies the configuration box for the name and location of the data storage file.

The yellow boxes identify a number of configuration options for the data acquisition process. The Samples per File is a user input for the total number of samples in a data record. Note that all selected registers will have this number of samples in the data record file, after the acquisition process completes. After each update to the Record Length box, the software calculates and displays the total Capture Time. The Numeric Data only..No File header option allows the user to add or remove the header in the data storage file. The No Scale LSB's Only causes the software to convert the decimal, twos complement number into its representative value. For example, when enabling No Scale LSB's Only, the gyroscope outputs will be in units of degrees/second.

EXAMPLE EXERCISES

This section currently has no ADIS16375-specific content, but the ADIS16448 Evaluation on the EVAL-ADIS Wiki Site has some good examples to start with.