ADIS16266 EVALUATION ON THE EVAL-ADIS

The ADIS16266 iSensor® is a high performance, digital gyroscope sensing system that operates autonomously and requires no user configuration to produce accurate rate sensing data. It provides performance advantages with high dynamic range, wide bandwidth, and solid linear-acceleration rejection, which are enabling for robotics and industrial instrumentation systems. The ADIS16266 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:

For those who are on a tight timeline, connecting the ADIS16266 to an embedded controller will provide the most flexibility in developing application firmware and will more closely reflect the final system design. The ADIS16266/PCBZ is the breakout board for the ADIS16266 and may provide assistance in the process of hooking it up to an existing embedded processor system. For more information on the ADIS16266/PCBZ breakout boards, check out the following datasheet link.

For those who would prefer to perform PC-based evaluation of the ADIS16266, 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.

EVAL-ADIS

ADIS16266/PCBZ

Windows XP, Vista, 7

.NET 3.5 Framework

Use the following materials to install the ADIS16266/PCBZ onto the EVAL-ADIS. Note that the ribbon cable does not currnently come with either part number. See the following FAQ on the Engineer Zone, for information on where to purchase one of these.

The ADIS16266/PCBZ mounting holes will line up with the four holes on the EVAL-ADIS, which have the “A” label on them.

Before starting to install, check out the following pictures, which show INCORRECT examples of connecting the ribbon cable to J1 on the ADIS16266/PCBZ

INCORRECT

INCORRECT

CORRECT

You may find that it is easier to install the ADIS16266/PCBZ on the EVAL-ADIS, before pressing the ribbon connector on to J1, for both PCBs.

PHYSICAL INSTALLATION COMPLETE AND CORRECT

Click here to download the IMU Evaluation software to a personal computer, which enables PC-based evaluation of all ADIS1648x products on an EVAL-ADIS evaluation system. The download file will contain three separate files: The USB driver (SDPDrivers.exe), the application file (IMUEvaluation.exe) and the revision table. Copy these files to a convenient folder for running the application from.

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.

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 its 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.

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 drop-down menus (Top Row)provide a number of useful features. The Devices option provides a list of products. For evaluation of the ADIS16266, click on Devices and then select the part number (ADIS16266, for example). The following figure shows the appearance of the main screen, after selecting the ADIS16266 as the current selection.

The Register Access option provides a listing of user-configurable registers available from the part number selected in the “Devices” drop down menu. It also provides read/write access to each one of these registers.

The Data Capture option provides the core data collection function.

The Demos option only supports a 3-D rendering tool on the ADIS16480.

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

The About option provides more detail software revision information.

Click on Run to start the waveform recorder response. While holding the EVAL-ADIS/ADIS16266 in hand, swing it back and forth, while observing the response.

Right click on the waveform recorder to change the range settings on the waveform recorder.

The purpose of the Register Access window is to provide both read and write access to the user registers in the ADIS16266. The following picture shows the appearance of this window.

Access a register's values by clicking on it. For write-enabled registers, such as SMPL_PRD, enter a new value (hexadecimal format) and then click on Write to write the value into the register. See the following figure for an example:

APPLICATION TIP: The Register Access screen writes to user control registers, inside of the ADIS16266, 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 ADIS16266, each command (16-bits) writes to one byte at a time.

Also take note of the Select a Category drop-down selector. This provides access to different functional groups of user-accessible registers.

The Data Capture function supports synchronous data acquisition, based on the data-ready signal from the ADIS16266. 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.

Select the registers, number of samples and the destination file to configure the software for a particular data capture process. Once the configuration is complete, click on START to start the capture process. An horizontal status bar will appear and provide progress in terms of “percentage complete.” Click on STOP to interrupt the data acquisition process. Note that the datalog file will contain all data, prior to interruption.