Walkie-Talkie via Bluetooth

Walkie-Talkie via Bluetooth

By : Kopitman Reem

Stolberg DmitriInstructor:

Chen Koren

The final presentation

Project GoalsProject Goals

Implementation of wireless communication via Bluetooth

Voice wireless transmission

GeneralGeneral

Walkie A Walkie B

AbstractAbstract

System contains two identical and independent units

Each unit : provides duplex wireless connection can function as both master and slave creates and manages digital data implements USB and BT protocols

Unit structureUnit structure

AsgardTeledim

Project milestonesProject milestonesHardware: Asgard (BT stack) architecture Voice using codec (TD) External memory (TD)

Software: Bluetooth features and protocol (Asgard) Operating System (Asgard assembly) USB protocol (Asgard) System assurance and validation

Hardware aspects - logicalHardware aspects - logical

Data propagation

– Audio

– A/D and PCM

– Shift register

– BT controller

– USB host

– Bluetooth Application Kit

Hardware aspects - logicalHardware aspects - logical

Timing control

– Clock generator

– Divider

– Synchronizer

Hardware aspects - teledimHardware aspects - teledim

Handset

Analog_inout[3..0]

Vcc_3_3v

J1

CON50

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

Code_Memory

EEPROM

EEPROM_Cont[3..0]

Address[14..0]

Data[7..0]

GND_3_3v

Clock

2048kHz

8kHz_Pulse

8kHz

GND_5v

Vcc_5v

Codec

PCM_in

PCM_out

8kHz_Pulse

2048kHz

Analog_inout[3..0]

Teledim - CodecTeledim - Codec

R3

10k

R2

10k

R4 10k

Mic_plus

C1

0.1u

PCM_out

C40.01u

Speaker_minus

C31u

R6

10k

2048MHz

PCM_in

8kHz_pulse

RV120k

5v

U1

MC145483

45

20

12

8

18

19

716

91211

3

10

13

14

17

PO-PO+

VAG

RO+RO-

DR

TI-

TI+

FSRMU/A

BCLKRBCLKTMCLK

PI

PDI

DT

FST

TG

R1

10k

R5

10k

Speaker_plus

C2

0.1u

Mic_minus

Teledim - ClockTeledim - Clock

Teledim - MemoryTeledim - Memory

Address9

Data[7..0]

Address12

Address4

OE

Address8Address7

Address[14..0]

Address11

Address3

Address1Address0

CE

Address2

Address5Address6

Address14

Address10

WEAddress13

U5

AT28HC256_J

1314151819202122

1110

987654

29282427

330

2 23

25

31

I/O0I/O1I/O2I/O3I/O4I/O5I/O6I/O7

A0A1A2A3A4A5A6A7A8A9A10A11A12A13A14 CE

OE

WE

Asgard - SynchronizerAsgard - Synchronizer

Asgard – Shift registerAsgard – Shift register

Asgard – BT controller interfaceAsgard – BT controller interface

AsgardUser Interface

40 pin Bufdata[39..0]

Asgard – BT controller interfaceAsgard – BT controller interface

16 pin- Address Address[15..0]

16 pin- I/O Bufdata[15..0]

8 pin- Data Data[7..0]

Data from internal c_mem

Data to external eeprom

Address from Registers

Data from external eeprom

Address from CPU

Software – GeneralSoftware – General

BT features

USB Interface

Asgard OS

Debugging software

Software – BluetoothSoftware – Bluetooth

Various topologies of connection

Software control

Software – Bluetooth Software – Bluetooth

Bluetooth layers OS organization

Software – OS algorithm Software – OS algorithm

Start

USB Initialization

Bluetooth Initialization

Master/ Slave?

Create ACL Connection

MasterSlave

Send and Receive Data Packets

Disconnect comm./request

Disconnect

Yes

No

Is there connection request?

No Yes

Software – DebuggingSoftware – Debugging

USB analyzer

VBT receive ( RS232 )

Bluepearl (BT Stack simulation)

PC_BT ( BT Stack )

Software – DebuggingSoftware – Debugging

Asgard

Usb

cable

Usb cable

דגימות מפורט

ASGARDטורי של

Alternative system configurationAlternative system configuration

ACLSCO

AsgardTelerem

No Real time ACL based connection

The endThe end

Asgard

Teledim

FPGA

Codec

Driver

PAR2SERPAR2SERPCM ConverterPCM Converter

AudioAudio

AmplifierAmplifier

A/DA/D

Sync. System Shift RegisterShift Register

DividerCLK

USB HostUSB Host

Code Memory

BlueTooth Application Kit

BlueTooth Application Kit

ProcessorProcessor

Inte

rfac

eIn

terf

ace