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ADIS1636x EVALUATION ON THE ADISUSB

OVERVIEW

The ADIS16362 is a high-performance IMU that uses a serial peripheral interface for data communications. This interface enables direct connection with a large variety of embedded processor products. This electrical connection typically only requires 5 I/O lines for synchronous data collection, as shown in the following figure:

This Wiki will cover all members of the ADIS1636x family: ADIS16360 ADIS16362, ADIS16364, ADIS16365, ADIS16367.

ADIS16362/PCB BREAKOUT BOARD

For those who are on a tight timeline, connecting the ADIS16362 to an embedded controller will provide the most flexibility in developing application firmware and will more closely reflect the final system design. The ADIS16362/PCBZ is the breakout board for the ADIS16362 and may provide assistance in the process of hooking it up to an existing embedded processor system. Also see the following breakout board pages:

EVAL-ADIS: PC EVALUATION

For those who would prefer to perform PC-based evaluation of the ADIS16362, before developing their own embedded system, the EVAL-ADIS is the appropriate system to use. The remainder of this Wiki site will focus on PC-based evaluation with the EVAL-ADIS system.

EQUIPMENT LIST

EVAL-ADIS

ADIS16362BMLZ

SYSTEM REQUIREMENTS

Windows XP, Vista, 7

.NET Framework 3.5

NOTE: Newer versions of the .NET framework do not currently support the IMU Evaluation software package.

PHYSICAL SETUP

The ADIS1636x/PCBZ includes one interface PCB, which requires two M2 or 2-56 machine screws to secure the baseplate to the system printed circuit board. The ADIS1636x product family is approximately 22 mm × 32 mm × 24 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 ADIS1636x to the EVAL-ADIS.

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

Step #1

The ADIS1636x installs directly into the J4 connector of the EVAL-ADIS The following pictures provide a visual reference for correct connection. Mounting to the system frame is accomplished by using 2 M2 pre-drilled holes in the EVAL-ADIS, marked 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 ADIS1636x/PCBZ includes one ADIS1636x; one interface printed circuit board PCB. The interface PCB simplifies the process of designing the ADIS1636x into an existing processor system. J1 and J2 are dual-row, 2 mm (pitch) connectors that work with a number of ribbon cable systems, including 3M Part Number 152212-0100-GB (ribbon crimp connector) and 3M Part Number 3625/12 (ribbon cable). The picture (below left) provides a location mounting pattern design for installing the ADIS16364BMLZ and the interface PCB onto the same surface. This is for the older 12 pin legacy ADISUSB board. The 16 pin EVAL-ADIS system and the interface PCB provides a 16 pin connection to an ADIS1636x product family sensor seen below.

Step #3

The following picture shows JP1 in the +5V position required for the ADIS1636x product family sensors. Note the JP1 jumper (factory-default) setting on the EVAL-ADIS is +3.3v. The power management system provides jumper selection for three device under test (DUT) power options: 5 V (USB), 3.3 V, and an external power option. The 5 V option provides access to the USB’s 5 V supply voltage for the DUT, and the 3.3 V option uses a linear regulator, 400 μF of bulk capacitance, and a soft start circuit to manage transient currents on the USB port.

NOTE: If JP1 is left on +3.3V, all outputs may not respond and will appear to be saturated in one direction or the other. See the following picture for an example of this behavior.

IMU EVALUATION SOFTWARE INSTALLATION

Click here to download the IMU Evaluation software to a personal computer, which enables PC-based evaluation of the ADIS16362 on an EVAL-ADIS evaluation system. The download file will contain three separate files: The USB drivers (SDPDrivers.exe), the application file (IMUEvaluation.exe) and the revision table. Copy these files to a convenient folder for running the application from.

USB Driver Installation

The SDPDrivers.exe file contains USB drivers that are compatible with both 32-bit and 64-bit Windows systems. Double-click on the SDPDrivers.exe file and follow the prompts to install the USB driver files onto the PC. When the following window appears, click on Next and then click on Install to continue with the installation.

The following pictures show the progress bar and the final confirmation window. Click on Finish to complete the installation.

IMU EVALUATION SOFTWARE GUIDE

After the USB driver installation is complete, connect the EVAL-ADIS USB connector to the PC, using the USB Mini cable, from the EVAL-ADIS kit. LED2 will illuminate as soon as this connection is made. This indicates that the EVAL-ADIS has power and is going through its start-up/initialization process. After the EVAL-ADIS completes this process, LED1 will illuminate, indicating that it is time to launch the IMU Evaluation application. During the initialization process, several messages may appear on the screen. They are related to updating the EVAL-ADIS firmware and establishing communication between the PC and the EVAL-ADIS. Once LED1 lights up, double click on the IMU_Evaluation.exe file to launch the application.

Main Window

Once the IMU 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 Devices option provides a list of products. For ADIS16362 Evaluation, click on Devices and then select ADIS16362. The green box shows the current device selection, which in this case, identifies the ADIS16362 as the current selection.

The Register Access option provides a listing of user-configurable registers in the ADIS16362 and also provides read/write access to each one of these registers.

The Data Capture option provides the core data collection function.

The Demos option does not support the ADIS16362.

The Tools option provides some diagnostic tools for the USB interface.

The About option provides more detail software revision information.

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 three waveform recorder windows. The top window contains the three gyroscope outputs. The middle window contains the three accelerometer responses. The bottom window contains the three magnetometer 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 ADIS16362. 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 Update Registers in Category button (orange box) triggers a read and display update of all registers in the current category (red box).

The yellow box identifies the area that provides single-bit command buttons, such as the ones provided by the GLOB_CMD register.

The Save Reg Settings to File command saves all of the registers in the current category into a *.csv (common-delimited) file. The Load Reg Settings from File button reads the settings back into the software package and triggers a routine that updates all registers with the values from this file.

APPLICATION TIP: The Register Access screen writes to user control registers, inside of the ADIS16362, 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 ADIS16362, 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 ADIS16362. 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 box identifies a number of configuration options for the data acquisition process. The Record Length 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. The Sample Rate represents the rate that the ADIS16362 updates its output register. This depends on the configuration in the SMPL_PRD {12:8] bits. For example, if SMPL_PRD = 0x0801, bits 12:8 represent a decimation setting of 8, which would result in an update rate of 102.5 SPS. After each update to the Record Length box, the software calculates the displays the total Capture Time. The Add Header option allows the user to add or remove the header in the data storage file. The Use Scaled Data causes the software to convert the decimal, twos complement number into its representative value. For example, when enabling Use Scaled Data, the gyroscope outputs will be in units of degrees/second.

EXAMPLE EXERCISES

This section currently has no ADIS16362-specific content, but the ADIS16448 Evaluation on the EVAL-ADIS Wiki Site has some good examples to start with.

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