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This version (11 Apr 2012 11:10) was approved by Andrei Cozma.The Previously approved version (11 Apr 2012 11:09) is available.
This version (11 Apr 2012 11:10) was approved by Andrei Cozma.The Previously approved version (11 Apr 2012 11:09) is available.This is an old revision of the document!
Table of Contents
ADXRS453 Pmod Xilinx FPGA Reference Design
Introduction
The ADXRS453 is an angular rate sensor (gyroscope) intended for industrial, instrumentation, and stabilization applications in high vibration environments. An advanced, differential, quad sensor design rejects the influence of linear acceleration, enabling the ADXRS453 to offer high accuracy rate sensing in harsh envi-ronments where shock and vibration are present. This reference design allows full programming of the device, and also includes monitoring rotation angles on Z-Axis and printing them on the UART.
Two reference designs are available for this part:
- A design which shows how to acquire data from the ADXRS453 Gyroscope.
- System: Microblaze, AXI, UART
- A design which demonstrates how to acquire data and display it using Digilent PmodGYRO2 and PmodACL. Data acquired from PmodGYRO2 is displayed in Degrees per Second, and data acquired from PmodACL is displayed in g. Data is formatted in 4 columns.
- System: Microblaze, AXI, UART
ADXRS453 Pmod Reference Design
Quick Start Guide
The bit file provided in the project *.zip file combines the FPGA bit file and the SDK elf files. It may be used for a quick check on the system. All you need is the hardware and a PC running a UART terminal and the programmer (IMPACT).
Required Hardware
Required Software
- Xilinx ISE 13.2 (Programmer (IMPACT) is sufficient for the demo and is available on Webpack).
- A UART terminal (Tera Term/Hyperterminal), Baud rate 9600.
Running Demo (SDK) Program
If you are not familiar with LX9 and/or Xilix tools, please visit
http://www.xilinx.com/products/boards-and-kits/AES-S6MB-LX9.htm for details.
http://www.xilinx.com/products/boards-and-kits/AES-S6MB-LX9.htm for details.
Extract the project from the archive file (ADXRS453.zip) to the location you desire.
To begin, connect the PmodGYRO2 to J5 connector of LX9 board, pins 7 to 12 (see image below). You can use an extension cable for ease of use. Connect the USB cables from the PC to the board.
Start IMPACT, and double click “Boundary Scan”. Right click and select Initialize Chain. The program should recognize the Spartan 6 device (see screenshot below). Start a UART terminal (set to 9600 baud rate) and then program the device using the bit file provided in the project *.zip archive, located in the “sw” folder (../adxrs453/sw/ADXRS453.bit).
If programming was successful, you should be seeing messages appear on the terminal window as shown in the figure below. After programming the ADXRS453 device, the program will automatically send the recommended initialization sequence. Once complete, it will start to print current angles/second rotation on Z-Axis on the UART.
Information displayed in the Terminal Screen is in Degrees/Second, representing the rotation described by the Pmod around the marked Axis in the past second. If you rotate the Pmod slowly, you will see a smaller value (e.g. 30 Degrees/Second), while rotating the Pmod at a higher speed will result in a higher value (e.g. 300 Degrees/Second). Afterwards the device will auto calibrate according to its new position, thus displaying a value close to 0 Degrees/Second.
Using the reference design
Functional Description
The reference design is a simple SPI interface for the ADXRS453. The software programs the device and monitors vibrations or rotations. The information is displayed on UART.
The hardware SPI access allows reading or writing of any ADXRS453 registers via the address, write and read data registers.
Connecting the PmodGYRO2 to the LX-9 Board using an extension cable provides ease of use.
UART must be set to 9600 baudrate.
UART must be set to 9600 baudrate.
Downloads
ADXRS453 Pmod and ADXL345 Pmod Reference Design
Quick Start Guide
The bit file provided in the project *.zip file combines the FPGA bit file and the SDK elf files. It may be used for a quick check on the system.
Required Hardware
Required Software
- Xilinx 13.2 Design Suite (contains ISE, XPS, SDK and ChipScope Pro).
- A UART terminal (Tera Term/Hyperterminal), Baud rate 57600.
Running Demo (SDK) Program
If you are not familiar with LX9 and/or Xilix tools, please visit
products/boards-and-kits/AES-S6MB-LX9.htm for details.
To begin, connect the PmodGYRO2 to J5 connector of LX9 board, pins 7 to 12. You must use an extension cable or the Pmod-TPH (Digilent). Afterwards connect PmodACL to connector J4 of the LX9 Board (see image below).
Start IMPACT, and double click “Boundary Scan”. Right click and select Initialize Chain. The program should recognize the Spartan 6 device (see screenshot below). Program the FPGA using the download.bit file provided in the project *.zip archive, located in the “sw” folder (../adxrs453_adxl345/sw/download.bit).
Start a Hyperterminal program (Tera Term, puTTy, etc.), select the proper COM Port (look for the COM Port named Silicon Labs CP210x USB to UART Bridge in Windows Device Manager). Select 57600 Baud Rate and Odd Parity. You should start seeing messeges in the Terminal Window, displayed on 4 columns, representing the rotation of the board in Degrees per Second, and the acceleration in g on each axis.
On the LX-9 MicroBoard D10 and D9 display the Tap/Double Tap status. If you tap the device once, D10 will turn on for a short period of time. If you double tap the device, D10 and D9 will both turn on at the same time.
- Connecting the PmodGYRO2 must be done with an extension cable or a PmodTPH.
- Connecting the PmodACL to the board with an extension cable provides ease of use.
- UART must be set to 57600 baudrate.
Downloads
More information
resources/fpga/xilinx/pmod/adxrs453.1334135448.txt.gz · Last modified: 11 Apr 2012 11:10 by Andrei Cozma