CSR BlueLab User Manual

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_äìÉi~Ä»

BlueLab™ v3.2 Combined AV Headset

User Guide

May 2005

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Registered in England 3665875

This material is subject to CSR’s non-disclosure agreement.

CSR

Churchill House

Cambridge Business Park

Cowley Road

Cambridge CB4 0WZ

United Kingdom

Tel: +44 (0)1223 692000

Fax: +44 (0)1223 692001

www.csr.com

Contents

1 Introduction....................................................................................................................................................3

2 Target Audience.............................................................................................................................................4

3 Target Hardware.............................................................................................................................................5

4 BlueLab Installation.......................................................................................................................................6

4.1 Prerequisites............................................................................................................................................6

4.2 Installation procedure ..............................................................................................................................6

4.2.1 MP3 Support................................................................................................................................7

5 Combined AV Headset Application..............................................................................................................8

5.1 Building the Combined Headset Application............................................................................................8

5.2 Building the Combined Headset Application with MP3 Support.............................................................12

5.3 CVC echo cancellation and noise reduction software............................................................................13

5.4 Restoring Factory Chip Settings............................................................................................................13

6 Pairing...........................................................................................................................................................16

6.1 Pairing ...................................................................................................................................................16

6.1.1 Handset......................................................................................................................................16

6.1.2 CSR USB Multimedia Dongle ....................................................................................................16

7 Operation......................................................................................................................................................17

7.1 Modes of Operation...............................................................................................................................17

7.1.1 HFP/HSP Modes........................................................................................................................17

7.1.2 AV Mode....................................................................................................................................17

7.2 Powering the Combined AV Headset On or Off.....................................................................................17

7.3 Button Functionality...............................................................................................................................17

7.3.1 AV Mode....................................................................................................................................18

7.3.2 HFP + AV...................................................................................................................................19

7.3.3 HSP + AV...................................................................................................................................20

8 Decoder behaviour settings ........................................................................................................................ 21

Document References ........................................................................................................................................ 22

Terms and Definitions ........................................................................................................................................23

Document History...............................................................................................................................................24

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List of Figures

Figure 5.1: BlueCore3-Multimedia Development Board..........................................................................................8

Figure 5.2: Start xIDE..............................................................................................................................................9

Figure 5.3: Open sbc_decode Workspace............................................................................................................10

Figure 5.4: Build av_headset_hfp Application.......................................................................................................12

List of Tables

Table 7.1: Button Functionality in AV Mode ..........................................................................................................18

Table 7.2: Button Functionality in HFP Mode........................................................................................................19

Table 7.3: Button Functionality in HSP Mode........................................................................................................20

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Introduction

1 Introduction

This document provides information on the Combined AV Headset application that accompanies BlueLab™ v3.2. This document describes how to compile, download and run the application.

The application demonstrates to product developers the features of _дмЙ`зкЙ»PJjмднбгЙЗб~. The application is a starting point for product development programs. It is envisaged that product developers may define their own Man Machine Interface (MMI) and add such features as battery monitoring to create a finished end-product.

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Target Audience

2 Target Audience

The target audience for this document is hardware and software developers using the Combined AV Headset application that accompanies BlueLab v3.2 as a basis for their own product developments.

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3 Target Hardware

Target Hardware

The target hardware is CSR’s BlueCore3-Multimedia Development Board (DEV-PC-1307 Rev C). The user will also need a suitable AV source capable of providing a Bluetooth audio stream.

Note: CSR’s BlueCore3-Multimedia Development Board (DEV-PC-1307 Rev A) is not suitable to run this

application. The microphone input circuit does not work on this revision of the board.

wireless technology-compliant SBC encoded

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4 BlueLab Installation

This chapter provides guidance on the installation of xIDE as supplied on the BlueLab CD-ROM.

4.1 Prerequisites

BlueLab Installation

BlueLab xIDE should be installed on a PC running Windows 2000 or Windows XP.

CSR recommend that 150Mbytes of free disk space is available.

Note: A typical BlueLab installation requires 125Mbytes and each application built will need approximately

10Mbytes of additional space.

A minimum of Windows Power User privileges is required to install the software correctly.

Note: If you are unsure of your current level of privileges, please contact your system administrator.

New BlueLab installations can coexist with previous releases provided they are installed in different directories. The use of a convention such as C:\BlueLabversion (eg avoid conflict between versions.

Note: Spaces in folder names of the directory path are not supported ie you should not try to install the software in a

directory which itself has spaces in its name or is contained within a folder that has spaces in its name eg xIDE cannot be successfully installed in the Program Files directory.

C:\Bluelab3_2) to create the program folder will

4.2 Installation procedure

CSR recommend that any applications running on the PC are closed before instal ling the BlueLab software.

1. Insert the Bluelab CD-ROM into the computer’s CD drive.

2. Right-click on the Windows Start menu and explore the CD-ROM. The CD-ROM contains PDFs of the Bluelab documentation and the BlueLab executables.

3. Double-click on rest of the installation process.

4. Follow the on-screen instructions, clicking For a first time installation, CSR recommend that the default settings are accepted.

5. When the VM and DSP libraries have been built, the PC the Setup Wizard will display the final setup screen.

6. Click

Finish to complete the installation.

If the default option to install the Serial Peripheral Interface (SPI) device driver was accepted, the PC must be restarted to complete the installation.

BlueLab-3.2.exe file to launch the Setup wizard, which will guide you through the

Next to continue.

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BlueLab Installation

4.2.1 MP3 Support

The Digital Signal Processor (DSP) libraries required to build the MP3 decoder must be obtained and installed separately (please contact the support channel for details).

They contain MP3 technology which incorporates intellectual property owned by Thomson and/or Fraunhofer Gesellschaft.

Supply of this product does not convey a license under the relevant intellectual property of Thomson and/or Fraunhofer Gesellschaft nor imply any right to use this product in any finished end user or ready-to-use final product. An independent license for such use is required. For details, please visit

http://www.mp3licensing.com.

4.2.2 Wolfson external CODEC support

The Combined AV application shipped with BlueLab v3.2 inc ludes support for the Wolfson (WM8731) CODEC.

To enable support for the Wolfson CODEC simply add WOLFSON_CODEC to the list of Define symbols in the

Project Properties (as shown below) before building the application.

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Combined AV Headset Application

5 Combined AV Headset Application

When BlueLab v3.2 has been successfully installed, the Combined AV Headset application can be built and executed using the application source code, shipped with BlueLab v3.2.

This section guides you step-by-step through the process of building and executing this application.

The application implements the following profiles:

! Headset Profile ! Handsfree Profile ! Advanced Audio Distribution Profile ! Audio/Video Remote Control Profile

This enables stereo music to be streamed to the headset with the ability to accept and make telephone calls via a Bluetooth-enabled mobile phone.

5.1 Building the Combined Headset Application

Step 1: Connect BlueCore3-Multimedia Development Board

1. Connect your BlueCore3-Multimedia Development Board to your PC per the instructions supplied with the development kit.

2. Ensure that you have connected the mini-USB connection and the SPI connection.

3. Turn on the board and ensure that the jumpers are configured as shown in Figure 5.1.

Figure 5.1: BlueCore3-Multimedia Development Board

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OFF

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Step 2: Start xIDE

Combined AV Headset Application

Double-click on the

xIDE icon on your desktop or from the Start / Programs menu.

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Figure 5.2: Start xIDE

If previous application development work has been carried out on the BlueCore3-Multim edia Development Board, CSR recommends that you restore the factory setting of the BlueCore chip.

A .psr file has been added to BlueLab v3.2 to simplify this process, for further information see section

5.3.

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Step 3: Open sbc_decode Workspace

Select Project / Open Workspace, navigate to \BlueLab\apps\av_headset_hfp and select

Combined AV Headset Application

sbc_decoder.xiw.

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Figure 5.3: Open sbc_decode Workspace

Step 4: Optional – set streaming options

Three options are defined in the code to control the latency/robustness of the DSP buffer operation. By default this is set to maximum robustness (

If this option is acceptable proceed to step 5.

Note: Only one option can be defined when building the project.

However, if a reduction in latency is required, two other options are available as defined by

STREAMING_MAX_RANGE_AND_ROBUSTNESS).

STREAMING_STANDARD_LATENCY and STREAMING_LOW_LATENCY.

Note: The values controlled by these definitions can be changed in the code, if required

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To implement one of these options add the required definition to the Define symbols field in the Project Properties dialogue:

4.1. Select Project \ Properties

The Properties dialogue appears:

Combined AV Headset Application

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4.2. Delete the existing definition.

4.3. Enter the required definition to the Define symbols field

Step 5: Build sbc_decoder DSP Application

Select

Build / Build or press F7 to build the sbc_decoder DSP application.

Note: If the MP3 add-on has been installed xIDE will not download the av_headset_hfp application if the

mp3_decoder.xiw has not been built, see section If the MP3 add-on has not been installed proceed as described in step 5.

Step 5: Open av_headset_hfp Workspace

Select Project / Open Workspace, navigate to \BlueLab\apps\av_headset_hfp and select

4.2.1.

av_headset_hfp.xiw.

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Step 6: Build av_headset_hfp Application

Select Build / Build menu or press F7 to build the av_headset_hfp VM application.

Combined AV Headset Application

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Figure 5.4: Build av_headset_hfp Application

Step 7: Download and Execute Combined AV Headset Application

Run from the Debug menu or press F5 to download and execute the application. The application image

Select (including the DSP code built in Step 3) will be downloaded to the BlueCore3-Multimedia development board connected to your PC.

5.2 Building the Combined Headset Application with MP3 Support

The DSP libraries required to build the MP3 decoder must be obtained and installed sep arately (please contact the support channel for details).They contain MP3 technology which incorporates intellectual property owned by Thomson and/or Fraunhofer Gesellschaft.

Note: The Combined Headset application does not need to include the MP3 support code and can be built using

just the sbc_decoder.xiw as long as the MP3 add on executable has not been run.

Supply of this product does not convey a license under the relevant intellectual property of Thomson and/or Fraunhofer Gesellschaft nor imply any right to use this product in any finished end user or ready-to-us e final product. An independent license for such use is required. For details, please visit http://www.mp3licensing.com.

Note: Once the MP3 add-on has been installed the av_headset_hfp.xiw will not download without the

mp3_decoder.xiw having been built.

Step 1: Installing the MP3 add-on

Having installed BlueLab v3.2, install channel).

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BlueLab_3.2-release-mp3.exe (available via your usual support

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Step 2: Building the MP3 decoder

Build the MP3 decoder application by opening the mp3_decode workspace and selecting build in xIDE. The

Combined AV Headset Application

mp3_decode workspace can be built in exactly the same way as the sbc_decode workspace in section 5.1

Step 4.

Once the

mp3_decode application has been built go back to section 5.1 step 3 and continue with building the

av_headset_hfp application.

5.3 CVC echo cancellation and noise reduction software

To include CVC (Clear Voice Capture) echo cancellation and noise reduction simply add the define symbol

INCLUDE_CVC to the Project Properties / Define symbols field before building the av_headset_hfp.xiw

project.

Note: The CVC software is supplied for demonstration purposes only, is time limited and will become inactive after

processing data for five minutes.

The ParamMgr Utility can be used to fine tune the CVC code to optimise the performance based on the acoustic characteristics of your product. Please see the ParamMgr User guide (CSR reference blab-ug-007Pa).

5.4 Restoring Factory Chip Settings

The factory settings can be restored using the PSTool application supplied with BlueLab v3.2.

To restore the factory default settings using PSTool:

1. Open the PSTool application. Note: The The Choose transport dialog appears:

PSTool.exe can be found in the BlueLab install directory \tools\bin\PSTool.exe

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2. Select SPI BCCMD and LPT1 as the transport settings and click OK.

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The PSTool application dialog appears:

Combined AV Headset Application

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3. Select

Merge / File menu:

An ‘Open Persistent Store File’ dialog appears:

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4. Browse to the location of the factory_restore.psr file. The file is located in the BlueLab install directory ……\tools\bin\factory_restore.psr.

Combined AV Headset Application

5. Select the file and click The PSkeys that may result in unexpected chip behaviour, will be restored to their factory defaults.

Note: This may take a few minutes.

Open.

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Pairing

6 Pairing

The Combined AV Headset Application is now running on the BlueCore3-Multimedia Demonstration Board. To stream audio and connect a mobile telephone to the headset, it needs to be paired.

Stop the application by pressing

Shift-F5. This stops the application debugger and halts operation.

6.1 Pairing

To make the headset discoverable for 60 seconds, hold down VOL- and VOL+ and press the Reset button. The blue LED will begin flashing more rapidly indicating the device is discoverable. In this state the headset can be discovered by AV sources or a Bluetooth-enabled handset that supports the Headset or Handsfree profile.

6.1.1 Handset

With the Combined AV Headset in discoverable mode, pair the handset with the headset. The Pin Code is 8888. Refer to the Instruction Manual supplied by the Handset manufacturer for further information on pairing.

6.1.2 CSR USB Multimedia Dongle

The USB Multimedia dongle is supplied as part of the BlueLab3-Multimedia Development Kit. Plug this dongle into the USB port of your PC and start the

\BlueLab\tools\bin\

With the Combined AV Headset in discoverable mode, click on the Discover New Headphones button. The Multimedia dongle will locate the headset, pair and connect to the headset.

Note: By default a device running the av_headset_hfp application has a PIN of 8888. However, Multimedia

dongles shipping with previous versions of BlueLab have a PIN of 4444. If the devices fail to connect it is probable because the PINs are not matched. The way to resolve this conflict is to change the entry in the

PSKEY_FIXED_PIN. Change &035b = 0038 0038 0038 0038 to &035b = 0034 0034 0034 0034. When the

application is run in xIDE the PIN will then be set to 4444.

avcontrol.exe application located in the following folder:

av_headset_hfp.psr file that sets the

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7 Operation

7.1 Modes of Operation

The actions performed by the buttons change dynamically, depending on the current mode of operation.

Operation

7.1.1 HFP/HSP Modes

These modes of operation are active when there is no media stream active or whenever an HSP/HFP operation is performed while a media stream is active. These operations suspend the audio stream until the operation is complete. At this point, the media stream continues to play.

When initiating a Service Level Connection (SLC), the application will tries to connect using the HFP profile. If the handset does not support HFP, it tries HSP and, if that fails, the attempt to connect is aborted.

When the handset is connecting to the headset it accepts the connection for whatever profile the handset chooses.

It should be noted the CVC (Acoustic Echo Canceller and Noise Reduction) DSP algorith m can be compiled for inclusion into the is CVC disabled).

av_headset_hfp reference application. Refer to section 5.3 for compile instructions (default

7.1.2 AV Mode

This mode of operation is active whenever a media stream is active.

7.2 Powering the Combined AV Headset On or Off

To power the headset on, hold down the Play/Pause (F1) button for at least two seconds.

To power the headset off, hold down the Stop (F2) button for at least four seconds. The headset will only completely power down from that point when all current connections are closed, or a further timeout of five seconds occurs.

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7.3 Button Functionality

Table 7.1, Table 7.2 and Table 7.3 define the button functionalit y while the headset is in the different operation modes.

Note:

! Long press - Button held for more than two seconds ! Short press - Button held for less than two seconds

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Operation

7.3.1 AV Mode

Table 7.1 shows how the buttons operate while the headset is in AV Mode. Long presses have no effect, exce pt

Volume buttons.

for the

Button AV Mode

VOL+ Pressed Vol Up VOL+ Held (Acted on every 1s) Vol Up VOL- Pressed Vol Down VOL- Held (Acted on every 1s) Vol Down PLAY/PAUSE Pressed Play/Pause music STOP Pressed Stop music FORWARD Pressed Skip track forwards BACKWARD Pressed Skip track backwards

Table 7.1: Button Functionality in AV Mode

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Operation

7.3.2 HFP + AV

Table 7.2 shows how the buttons operate while the headset is in HFP Mode. It shows how the buttons operate depending on the state of the headset.

Table entries in italic describe the button functionality assuming an active AV stream.

Button/State Init Ready Connecting Connected

If there is no AV source connected replace avrcp calls with the non-italic calls

PLAY/PAUSE Short Press

PLAY/PAUSE Long Press

STOP Short Press

STOP Long Press

Vol+ Short Press

Vol+ Held (Acted on every 1s)

Vol- Short Press

Vol- Held (Acted on every 1s)

Forward (Long/Short) Press

Backward (Long/Short) Press

Play/Pause X Play/Pause X Play/Pause X Play/Pause

Voice

X X X

Stop

Volume up X Volume up X Volume up X Volume up

Volume

down

Volume

down

Volume

down

Volume

down

Forward

Backward X Backward X Backward X Backward

Stop

Last

number

redial

Volume

down

Volume

down

Volume

down

Volume

down

Forward

Stop

Volume

down

Volume

down

Volume

down

Volume

down

Forward

Recog. Enable

Stop

Last

number

redial

Volume up

Volume

down

Volume

down

Volume

down

Volume

down

Forward

Incoming

Reject Call

Volume up Volume up Volume up

Active

Call

Answer

Call

Answer

Call

Volume

down

Volume

down

X X X

Call

Transfer

Audio

Transfer

Audio

Hang up

Call

Hang up

Call

Volume

down

Volume

down

CVC

Mode*

Outgoing

Call

Hang up

Call

Hang up

Call

Volume

down

Volume

down

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Table 7.2: Button Functionality in HFP Mode

CVC Mode* If CVC is compiled in the application, with each short button press the software toggles between

HF, NR and PSTHRGH modes. This button is only operational if a connection exists and the device is not muted. When operational and the Backward button is pressed, the next mode will be selected and a tone will be played to the loudspeaker. The tone will identify the currently operating mode. The following indicates the tone mapping.

1 Beep, HF mode: Hands-Free is the combination of an AEC (Acoustic Echo Canceller with

microphone Noise Reduction). Default mode for CVC.

2 Beeps, NR mode: Noise Reduction to the microphone send-out signal.

3 Beeps, PSTHRGH mode: Pass through mode where the audio is routed through the Kalimba, disabling

Hands-free, effectively bypassing any audio processing.

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Operation

7.3.3 HSP + AV

Table 7.3 shows how the buttons operate while the headset is in HSP Mode. It shows how the buttons operate depending upon the state of the headset.

Table entries in italic describe the button functionality assuming an active AV stream.

Button/state Init Ready Connecting Connected

If there is no AV source connected replace avrcp calls with the non-italic calls

PLAY/PAUSE Short Press

PLAY/PAUSE Long Press

STOP Short Press

STOP Long Press

Vol+ Short Press

Vol+ Held (Acted on every 1s)

Vol- Short Press

Vol- Held (Acted on every 1s)

Forward (Long/Short) Press

Backward (Long/Short) Press

Play/Pause X Play/Pause X Play/Pause X Play/Pause

Stop

X X X X X X X X

Volume up X Volume up X Volume up X Volume up

Volume

down

Volume

down

Forward

Backward X Backward X Backward X Backward

Button

press

Stop

Volume

down

Volume

down

Forward

Table 7.3: Button Functionality in HSP Mode

Stop

Volume

down

Volume

down

Forward

Button

press

Stop

Volume

down

Volume

down

Forward

Incoming

Call

Button

press

Button

press

X End Call X

X X X

Active

Call

Button

press

Button

press

Volume

down

Volume

down

CVC

Mode*

Outgoing

Call

Button

press

Button

press

Volume up

Volume

down

Volume

down

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CVC Mode* If CVC is compiled in the application, with each short button press the software toggles between

1 Beep, HF mode: Hands-Free is the combination of an AEC (Acoustic Echo Canceller with

microphone Noise Reduction). Default mode for CVC.

2 Beeps, NR mode: Noise Reduction to the microphone send-out signal.

3 Beeps, PSTHRGH mode: Pass through mode where the audio is routed through the Kalimba, disabling

Hands-free, effectively bypassing any audio processing.

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Decoder behaviour settings

8 Decoder behaviour settings

The codec library contains a range of settings that control the decoding behaviour of the DSP.

The values defined for the variable especially when the device is at the extreme limits of Bluetooth range.

The parameters themselves are defined in the

$decoder_codec_stream_struc control the user experience,

$decoder_codec_stream_struc source code found in

C:\BlueLab\apps\av_headset_hfp\codec_decoder.asm. The numerical values can be simply

manipulated in the source code to optimise the required.

Note: The decoder project must be rebuilt in xIDE when any of these parameter values is changed in the source code.

See the xIDE on-line help (DSP Reference guide/File List/codec/stream_d ecode) for further explanation.

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Document References

Document Reference

BlueLab v3.2 Combined AV Headset Release Note blab-srn-002Pa BlueLab v3.2 Release Note blab-srn-001Pa BlueLab v3.2 ParamMgr User Guide (for CVC only) Blab-ug-007Pa

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Document References

Terms and Definitions

BlueCore™ Group term for CSR’s range of Bluetooth wireless technology chips BlueLab™ CSR’s development toolset for building applications to run in the firmware’s VM Bluetooth® Set of technologies providing audio and data transfer over short-range radio connections CSR Cambridge Silicon Radio CVC™ Clear Voice Capture DSP audio processing performing AEC and NR DSP Digital Signal Processor HFP Handsfree Profile HSP Headset Profile MMI Man Machine Interface SBC Sub-band Coding SLC SPI Serial Peripheral Interface USB Universal Serial Bus

Service Level Connection

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Document History

Revision Date Reason for Change

a 28 MAY 05 Original publication of this document (CSR reference blab-ug-005P a)

Document References

_äìÉi~Ä»=îPKO=Combined AV Headset User Guide=

BlueLab v3.2™

Combined AV Headset User Guide

blab-ug-005Pa

May 2005

Unless otherwise stated, words and logos marked with ™ or Silicon Radio Limited or its affiliates. Bluetooth Inc. and licensed to CSR. Other products, services and names used in this document may have been trademarked by their respective owners.

The publication of this information does not imply that any license is granted under any patent or other rights owned by Cambridge Silicon Radio Limited.

CSR reserves the right to make technical changes to its products as part of its development programme.

While every care has been taken to ensure the accuracy of the contents of this document, CSR cannot accept responsibility for any errors.

and the Bluetooth logos are trademarks owned by Bluetooth SIG,

are trademarks registered or owned by Cambridge

CSR’s products are not authorised for use in life-support or safety-critical applications.

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CSR BlueLab User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Introduction

2 Target Audience

3 Target Hardware

4 BlueLab Installation

4.1 Prerequisites

4.2 Installation procedure

4.2.1 MP3 Support

4.2.2 Wolfson external CODEC support

5 Combined AV Headset Application

5.1 Building the Combined Headset Application

5.2 Building the Combined Headset Application with MP3 Support

5.3 CVC echo cancellation and noise reduction software

5.4 Restoring Factory Chip Settings

6 Pairing

6.1 Pairing

6.1.1 Handset

6.1.2 CSR USB Multimedia Dongle

7 Operation

7.1 Modes of Operation

7.1.1 HFP/HSP Modes

7.1.2 AV Mode

7.2 Powering the Combined AV Headset On or Off

7.3 Button Functionality

7.3.1 AV Mode

7.3.2 HFP + AV

7.3.3 HSP + AV

8 Decoder behaviour settings

Document References

Terms and Definitions

Document History