iTÜ COMPUTER ENGINEERING INTERCONNECTION PROTOCOLS

PROJECT PRESENTATION Ersan Öztürk-504041515

26/12/2005

JAVA RADIO

Java Radio

Ersan ÖztürkOUTLINE

•Idea

•Aim

•Radio Chip: TEA5764

•I2C

•Parallel Port

•Hardware Connection

•OSI layers: physical, logical link

•JNI

•To do list

•Problems encountered

•Conclusion

Java Radio

Ersan ÖztürkIDEA

•Cell phones that does not have radio on

•64% of cell phones support Java applications.*

•People request music everytime, everywhere

*Source:GFK

Java Radio

Ersan ÖztürkAIM

•IO control of the phones requires longer time,

•So aim is:

Radio control via a PC using JavaTM language

•A radio that can be controlled via PC:

TEA5764

•Can be controlled via I2C

Java Radio

Ersan ÖztürkRadio Chip:TEA5764

•Chip produced by Philips,

•One of the smallest radio chips

•It supports Radio Display System (RDS)

RDS: station, song, artist display

•Control can be done via I2C

•Consumes low power

Java Radio

Ersan ÖztürkI2C - definition

•Inter Integrated Circuit

•Syncronious Serial Communication

LOW COST

COMPLEXITY

SPEED

•Developed by Philips semiconductors in 1980’s

•Used to control signal processing devices such as:RF tuners, video decoders,audio processors, EEPROMS, real time clocks etc.

Java Radio

Ersan ÖztürkI2C - Basics

Two lines: bidirectional communitaction

Dev. 2

Slave

Dev. 1

Master

SDA:Serial Data

SCL:Serial Clock

•Intiates and finishes communication

•Establishes syncronization by clock

•Determines data direction

•Responds when addressed, at the time given by master

Java Radio

Ersan ÖztürkI2C – Communication1

SEND / WRITE

START address R/W A_S Byte1 A_S ..... A_S STOP

0010000 0 XXXXXXXX

....

START address R/W A_S Byte1 A_M ..... NAMSTOP

0010000 0 XXXXXXXX

RECEIVE / READ

A_S: Acknowledge by slave

A_M:Acknowledge by master

NAM:Non Acknowledge by master

Java Radio

Ersan ÖztürkI2C – Communication2

START

STOP

ACK_MASTER

ACK_SLAVE

NON_ACK_MASTER

SCL:HIGH

SDA:HIGH > LOW

SDA:LOW > HIGH

SCL:HIGH

SCL:PULSE

SDA:LOW BY MAS.

SDA:LOW BY SLA.

SCL:PULSE

SDA:HIGH BY MAS.

SCL:PULSE

Java Radio

Ersan ÖztürkParallel Port - 1

•8 pins are bidirecitional used for data accessed via DATA PORT

•5 pins are input accessed via STATUS PORT

(one is inverted)

•4 pins are output accesses via CONTROL PORT (three are inverted)

•Remaining pins are Grounded

Java Radio

Ersan ÖztürkParallel Port - 2

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

DATA7

DATA6

DATA5

DATA4

DATA3

DATA2

DATA1

DATA0

IRQ

~ERROR

SELECT

PE

~ACK

BUSY

RESERVED

RESERVED

RESERVED

RESERVED

IRQENABLE

~SELECTIN

INIT

~AUTOFEED

~STROBE

DIRECTION

DATA (378|278|3BC) STATUS (DATA+1) CONTROL (DATA+2)

Windows NT,2000 and XP does not let user programs to reach memory addesses. Windows 98,ME let it!

Java Radio

Ersan ÖztürkHardware Connection

TEA5764SCL

PIN2

PIN16 SDA

GNDPIN18-25

PIN2: DATA PORT 0

PIN16:CONTROL PORT 2

PARALLEL PORT

VCC VDD VREFDIG

SPEAKER

Java Radio

Ersan ÖztürkCoding – Physical Layer

void Zero()

{

SDA(LOW);

delay (DELAY_MILIS,DELAY_NANOS);

SCL(HIGH);

delay (DELAY_MILIS,DELAY_NANOS);

SCL(LOW);

delay (DELAY_MILIS,DELAY_NANOS);

}

void One()

{

SDA(HIGH);

delay (DELAY_MILIS,DELAY_NANOS);

SCL(HIGH);

delay (DELAY_MILIS,DELAY_NANOS);

SCL(LOW);

delay (DELAY_MILIS,DELAY_NANOS);

} void SDA(int state)

{

if(state==0) lpt1.write_data (0x0000);

else lpt1.write_data (0x0001);

}

Java Radio

Ersan ÖztürkCoding – Network & Procol Layer

void radio_power(int onoff){

FMWrite();

if(ack_slave()==0)

writebyte(0x00ff); // byte0W

if(ack_slave()==0)

writebyte(0x002f); // byte1W : 00101111

if(ack_slave()==0) // 100.0 mhz

writebyte(0x00ca); // byte2W : 11011010

if(ack_slave()==0)

if(onoff==1)

writebyte(0x0040); // byte3W : 01000000

else

writebyte(0x0000); // byte3W : 00000000

if(ack_slave()==0)

Stop();

}

Java Radio

Ersan ÖztürkJava Native Interface (JNI)

A framework that enables Java codes to call native applications and libraries of languages such as C, C++ and assembly

It is mostly used for operating system and hardware related functions

Java Radio

Ersan ÖztürkJNI - Parport

import parport.ParallelPort;

class SimpleIO {

public static void main ( String []args )

{

ParallelPort lpt1 = new ParallelPort(0x378);

int aByte;

aByte = lpt1.read(); // read a byte from the port's STATUS pins

aByte = aByte >> 2; // a simple and irrelevant operation

lpt1.write(aByte); // write a byte to the port's DATA pins

System.out.println("Output to port: " + aByte);

}

}

Java Radio

lpt1.read_data()

In C language

inportb(DATA)

Java Radio

lpt1.write_data(aByte)

In C language

outportb(DATA,aByte)

Java Radio

Ersan ÖztürkHuman Interface

Java Radio

Ersan ÖztürkOutput – via Logic Analyzer

Java Radio

Ersan ÖztürkProblems Encountered

P1)Unsigned bytes are not avaliable in Java

S1)Integers were used instead of bytes

P2)Win XP not allow to reach parallel port

S2)Userport and DirectIO used then Win98 is used

P3)Java Comm is not flexible enough

S3)JNI is used,

P4)Data port used as unidirectional

S4)Parallel Port is set to Enhanced Parallel Port (EPP) from BIOS and direction selection is used on Control Port

P5)Can not get output from radio

S5)Still working on it!!!

Java Radio

Ersan ÖztürkTo do list

•Finish the code and test functions in details

•Establish RDS

•Implement the code in mobile phone emulators

•Differenciate code according to different mobile phone IOs and Java supports

•Marketing the radio to manufacturers nationwide

•Marketing the radio worldwide

•Make money$

Java Radio

Ersan ÖztürkConclusion

Project taught:

•One of the basic interconnection protocols I2C

•One of the basic connection components of PC: The Parallel Port

•Control mechanisms of chips

•Use of Java in low level (JNI)

At the end it can be a success in business.