Bosch SMB365 User Manual

ying

Installation and use of the BOSCH Sensortec

ABSTRACT

Application Note

BlueBox Demo-Board for the digital sensors

SMB365 (acceleration) and SMD500 (pressure)

multi sensor, wireless Demo-Board

BlueBox V1.0

Bosch Sensortec

AN18002

Based on the experience of 500 million MEMS sensors and testing to highest quality

standards, BOSCH Sensortec has developed a sensor family, consisting out of

pressure- and acceleration sensors with best-of-the-market performance and out-

standing reliability. Both the SMB365 acceleration sensor and the SMD500 pressure

sensor are specifically designed for digital low-power applications to enhance

functionality in consumer electronic devices as well as in health, logistics and security

systems. These sensors are available in small and thin standard packages

(QFN 4x4 mm² for acceleration and LCC8 5x5 mm² for pressure) to fit even into the

smallest, state-of-the-art devices.

This application note shows how to set up and how to install the SensorDesktop

software and the BlueBox hardware for functionality demonstration and some minor

evaluation purposes or application examples of the SMB365 and the SMD500 sensor.

The proper use and some general functions, e.g. wireless operation of the BlueBox

Demo-Board, are also described. For specific product evaluation refer to the BOSCH

Sensortec Evaluation Board which is especially designed for application engineering or

extensive testing purposes.

Discover more innovative perspectives for Life Sience and consumer applications:

www.bosch-sensortec.com

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 1

ying

BlueBox Demo-Board for the digital sensors

Application Note

SMB365 (acceleration) and SMD500 (pressure)

REQUIREMENTS

• IBM-compatible PC (min. 1.5 GHz and 128 MB RAM)

• Operating system: Windows2000

or WindowsXP®

• Bluetooth capability including software and drivers for optional wireless operation

• CD-ROM Drive

• Temporary administrator rights to install software

• Free USB 1.1 Port or higher for wire bounded operation

OPERATING CONDITIONS:

• Temperature: 0 – 55°C

Bosch Sensortec

AN18002

1) The Bosch Sensortec BlueBox with its Sensor Desktop software package supports full wireless operation via Bluetooth. The Bluetooth capability is

specific to the operating system. All additional necessary hard- and software (e.g. Bluetooth stick with its corresponding software and drivers) is not

included in the BlueBox multi sensor wireless demo board scope of delivery.

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 2

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

Content

INTRODUCTION 4

1.1 BOARD OVERVIEW 5

1.1.1 Acceleration Part (SMB365) 6

1.1.2 Pressure Part (SMD500) 6

1.2 BOARD CONSTITUENTS 7

HARD- & SOFTWARE INSTALLATION 8

QUICK-START 17

3.1 USB WIRE BOUND 17

3.2 BLUETOOTH WIRELESS 19

3.3 CUSTOM CALIBRATION OF THE PRESSURE SENSOR SMD500 21

3.3.1 Calibrate at sea level (via internet) 22

3.3.2 Calibrate at sea level (manual) 23

3.3.3 Calibrate altitude (manual) 24

OPERATION 25

4.1 THE BLUEBOX COCKPIT WINDOW 25

4.2 THE BLUEBOX ALTIMETER WINDOW 27

4.2.1 Additional Plots and Altimeter Settings 29

4.3 THE BLUEBOX ACCELEROMETER WINDOW 33

4.3.1 SMB365 Normal-Power Mode 35

4.3.2 SMB365 Low-Power Mode in global interrupt conditions 36

4.3.3 SMB365 Low-Power Mode in independent interrupt conditions 37

4.3.4 SMB365 Selftest 40

4.4 SENSOR EVALUATION AND DIRECT DATA EXPORT 42

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 3

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

1 Introduction

Sensors from Bosch Sensortec provide many capabilities for consumer products, offering a

wide range of new functions. By measuring acceleration, pressure and angular rate, they make

operating devices simpler and more intuitive. BOSCH Sensortec MEMS sensors also contribute

to more efficient medical care. Devided into acceleration and pressure sensing, the applications

are typically realized in the fields of

Acceleration Sensing

• Mobile phones and PDAs

• Portable music players

• Toys and gaming

• Portable city- and outdoor navigation

• Leisure and sports

• Camera and video equipment

• Mobile computing

• Security systems

• Health

• Home appliances

• Logistics

Pressure Sensing:

• Portable city- and outdoor navigation

• Dead reckoning

• Leisure and sports

• Weather forecast

• Vertical velocity indication (rise / sink speed)

• Security systems

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 4

ying

BlueBox Demo-Board for the digital sensors

SMB365 (acceleration) and SMD500 (pressure)

1.1 Board overview

Application Note

Bosch Sensortec

AN18002

SMD500

SMB365

[1.1] BlueBox overview including axes alignment for SMB365 acceleration sensor

The Bosch Sensortec BlueBox Demo-Board in combination with its SensorDesktop software

was built for the simultaneous demonstration of the general functionality of the digital

accelerometer sensor SMB365 and the digital pressure sensor SMD500. This includes the

possibility of demonstrating output signal behaviors of each sensor as graphical functions,

interrupt features different power modes, threshold and hysteresis limits, different acceleration

or pressure ranges, the self test function, as well as a user defined direct data export. All either

wire bound via USB or wireless via Bluetooth. Note that the Bosch BlueBox Demo-Board should

not be considered as an evaluation tool. For specific product evaluation refer to the

corresponding BOSCH Evaluation Kits.

After a simple installation of the SensorDesktop software and the connection of the demo board

to a free USB port acceleration specific signals corresponding e.g. to tilt, movement, free-fall,

vibration, shock as well as pressure specific signals corresponding e.g. to height, atmospheric

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 5

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

or differential pressure, change in weather and many more can all be measured and visualized

in real-time.

1.1.1 Acceleration Part (SMB365)

In order to measure the above mentioned acceleration specific signals, the BlueBox demo

board is equipped with the Bosch Sensortec SMB365 acceleration sensor. This digital, triaxial

accelerometer, on the basis of the differential capacitive principle, is able to measure low gravity

accelerations in two ranges (±2g and ±10g full scale) in all 3 directions in space, the X, Y and Z

direction with a resolution of 0.004g in the low g range. The alignment of the positive X, Y and Z

direction according to the acceleration sensor is described in the illustration [1.1] above. The

SMB365 is based on automotive proven Robert Bosch technology for silicon surface micro-

machining processes. This has been proven in more than 200 million Bosch accelerometers so

far.

1.1.2 Pressure Part (SMD500)

Additionally to the accelerometer, the BlueBox board is equipped with another Bosch Sensortec

product, the SMD500 pressure sensor, which marks a new generation of high precision digital

pressure sensors for consumer applications. The SMD500 is based on piezoresistive

technology for EMC robustness, high accuracy and linearity as well as long term stability. Its

ultra low-power, low voltage electronics are optimized for use in mobile phones, PDAs, GPS

devices and outdoor equipment. With an altitude noise down to 0.03 hPa (0.25 m) it offers

superior performance in a measurement range from 300 to 1100 hPa (+9000 to -500 m).

For detailed information please refer to the SMB365 and SMD500 related data sheets.

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 6

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

1.2 Board constituents

The following illustration describes the main elements of the BlueBox multi sensor demo board.

Main components are:

Number Component

1. Bluetooth unit

2. Bosch Sensortec SMB365 acceleration sensor

3. V

Voltage Regulator and V

reg

Logic Level Shifter

Shift

4. Microcontroller Programming Interface

5. 8bit Microcontroller

6. Converter ASIC; Bit Parallel to USB

7. Bosch Sensortec SMD500 pressure sensor

8. Data Transmission and Control LED‘s

9. USB I/O Port

10. On/Off switch

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 7

ying

BlueBox Demo-Board for the digital sensors

Application Note

SMB365 (acceleration) and SMD500 (pressure)

2 Hard- & Software Installation

1. Insert SensorDesktop-CD

2. Run “setup.exe” from the directory …:\ SensorDesktop _DemoSoftware

3. The following message box appears

Bosch Sensortec

AN18002

4. Click “Next”

5. The following message box appears

6. Select the primary installation directories “BST_SensorDesktop” and “National

Instruments” in the user specific directory “Program Files” (drive may vary from C:\)

7. The following message box appears

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 8

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

8. Accept the License Agreement(s) as described above.

9. Click “Next”

10. The following message box appears

11. Confirm installation by clicking on “Next”

12. While the installation is in progress, the following message box appears

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 9

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

13. Wait until the installation is finished

14. When the installation of SensorDesktop is finished, the following message box appears

15. Click finish and restart computer if necessary

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 10

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

16. After restarting the computer, connect the BlueBox demo board to a free USB port

17. Turn on the BlueBox (main switch on the board into the direction to the USB connector)

18. The following message boxes appears

19. Click “Next”

20. The following message box appears

21. Install Hardware Device Drivers by recommended selection as described above

22. Click “Next”

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 11

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

AN18002

SMB365 (acceleration) and SMD500 (pressure)

23. The following message box appears

24. Locate Files by selecting “CD-ROM drives” and “Specify a location” as described above

25. Click “Next”

26. The following message box appears

27. Make sure that the correct CD-ROM is inserted and confirm by clicking “OK”

28. Select “FTDIBUS.INF” as Hardware Device Driver

29. Click “Open”

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 12

ying

BlueBox Demo-Board for the digital sensors

Application Note

SMB365 (acceleration) and SMD500 (pressure)

30. If driver file has been successfully found, the following message box appears

31. Confirm the selection by clicking “Next”

Bosch Sensortec

AN18002

32. If the driver file has been successfully installed, the following message box appears

33. Click “Finish” to complete the FTDIBUS.INF Device Driver installation

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 13

ying

BlueBox Demo-Board for the digital sensors

Application Note

Bosch Sensortec

SMB365 (acceleration) and SMD500 (pressure)

34. After finishing of the FTDIBUS.INF Device Driver installation the following message

boxes appears

AN18002

35. Click “Next”

36. The following message box appears

37. Install Hardware Device Drivers by recommended selection as described above

38. Click “Next”

Rev. 1.0

and passing onto third parties.

7211RB11.

Page 14

+ 32 hidden pages