1st Rev Road Ragging

8/2/2019 1st Rev Road Ragging

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TRAFFIC SCRUNITING SYSTEM

ON ROAD RAGGING


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ABSTRACT

our proposed project aims to control the traffic,

and save time and their by providing space for their

movement .( for emergency vehicle such as

ambulance,govt vehicles etc) .

####### copy from base paper #########


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INTRODUCTION

In cities, traffic control can become chaotic when anemergency vehicle must travel through a busy intersection.The device, will transmit signals to traffic lights in trafficjunctions. The signal will command all other junction lightsto turn red so that the emergency vehicle (an ambulance,fire engine or police car) can make a safe path through busyintersections. As a result, the vehicle will get to itsdestination in a way that is safe for those inside it and forothers on the road. The project will involve designing thewireless transceiver to be connected to the control circuit of

the junction and a corresponding transmitter for the vehicle.They will also keep constant surveillance on the junctionbecause it is so busy.


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Second Vehicle

ATMEL

Micro Controller

AT89S52

Power Supply

Max 232

ZigbeeIEEE 802.15.4

LCD

2 x 16


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Master Vehicle

ATMEL

Micro Controller

AT89S52

Power Supply

Max 232

ZigbeeIEEE 802.15.4

LCD

2 x 16


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Base Station

ATMEL

Micro controller

AT89S52

Power Supply

Signal 1

Signal 2


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#include

void delay(unsigned int);

void lcd_data(unsigned char);

void lcd_command(unsigned char);void lcd_str(unsigned char*);

sbit irin=P0^7;

sbit trans=P0^6;

sbit rled=P1^5;

sbit yled=P1^6;

sbit gled=P1^7;sbit rs=P3^2;

sbit rw=P3^3;

sbit en=P3^4;

sfr p0=0x80;

sfr p1=0x90;

sfr p2=0xA0;sfr p3=0xB0;

void main()

{

unsigned char T,G;

p0=0xff;


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rs=0;

rw=0;

en=0;

TMOD=0x21;

TH1=0xFD;

SCON=0x50;

TR1=1;

lcd_command(0x01);

lcd_command(0x0E);

lcd_command(0x38);

lcd_command(0x80);

delay(14);

lcd_data('p');

SBUF='p';

while(TI==0);TI=0;

lcd_data('a');

SBUF='a';

while(TI==0);

TI=0;


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lcd_data('r');

SBUF='r';

while(TI==0);

TI=0;

lcd_data('i');

SBUF='i';

while(TI==0);

TI=0;

lcd_data('n');SBUF='n';

while(TI==0);

TI=0;

lcd_data('g');

SBUF='g';while(TI==0);

TI=0;

delay(5);

lcd_command(0x80);

lcd_str("Traffic System");

while(1)


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{

lcd_command(0x01);

lcd_command(0x0E);

lcd_command(0x80);

yled=0;

lcd_command(0x80);lcd_str("yellow");

delay(42);

lcd_command(0x01);

yled=1;

gled=0;

lcd_command(0x80);lcd_str("green");

delay(180);

lcd_command(0x01);

gled=1;

INTERRUPT:

rled=0;lcd_command(0x80);

lcd_str("red");

for(T=0;T


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if(trans==0)

{

lcd_command(0xC0);

lcd_str("scanning");

lcd_command(0xC0);

lcd_str("signal sending");delay(14);

SBUF='A';

while(TI==0);

TI=0; delay(103);

SBUF='B';

while(TI==0);TI=0;

lcd_command(0xC0);

lcd_str(" ");

}

delay(G);

}lcd_command(0x01);

gled=1;

yled=0;

lcd_command(0x80);

lcd_str("yellow");

delay(42);lcd command 0x01


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gled=0;

lcd_command(0x01);

lcd_command(0x80);

lcd_str("green");for(G=0;G


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}

delay(G);

}

lcd_command(0x01);

gled=1;

yled=0;lcd_command(0x80);

lcd_str("yellow");

delay(42);

lcd_command(0x01);

yled=1;


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goto INTERRUPT;

}

delay(T);

}

lcd_command(0x01);rled=1;

}

}

void lcd_str(unsigned char *disp)

{

int x;

for(x=0;disp[x]!='\0';x++)

{

lcd_data(disp[x]);

}

}

id d l ( i d i )


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void delay(unsigned int n)

{

int i;

for(i=0;i


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void lcd_data(unsigned char k)

{

p2=k;

rs=1;

rw=0;

en=1;delay(1);

en=0;

}


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#include


void lcd_command(unsigned char);


void lcd_str(unsigned char *);

sbit rs=P3^2; sbit rw=P3^3;

sbit en=P3^4;

sbit buzzer=P3^7;

sfr p0=0x80;

sfr p1=0x90;

sfr p2=0xA0;

sfr p3=0xB0;

unsigned char temp,input,i;

id i ()


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void main()

{

TMOD=0x21;

TH1=0xFD;

SCON=0x50;

TR1=1;lcd_command(0x01);

lcd_command(0x0E);

lcd_command(0x38);

lcd_command(0x80);

buzzer=1;

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

hil (RI 0)


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while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);


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delay(3);

lcd_command(0x80);

lcd_str(" First Vehicle ");

while(1)

{

lcd_command(0xC0);

lcd_str(" ");

lcd_command(0xC0);

while(RI==0);

temp=SBUF; RI=0;

input=temp;

if(input=='A')

{

lcd_str("amb : way please");

buzzer=0;

lcd_command(0xC0);

lcd_str(" scanning ");

lcd_command(0xC0);

delay(5);


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lcd_str("signal sending");

delay(70);

buzzer=1;

}

}

}

void lcd_str(unsigned char *disp)

{

int x;

for(x=0;disp[x]!='\0';x++)

{

lcd_data(disp[x]);

} }

void lcd_command(unsigned char a)

{

p2=a;

rs=0;

rw=0;

en=1; delay(1);

en=0;

}

void lcd data(unsigned char b)


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void lcd_data(unsigned char b)

{

p2=b;

rs=1;

rw=0;

en=1;delay(1);

en=0;

}

void delay(unsigned int n){

int i;

for(i=0;i


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#include


void lcd_command(unsigned char);


void transmit(unsigned char);

void lcd_str(unsigned char *);sbit rs=P3^2;

sbit rw=P3^3;

sbit en=P3^4;

sbit buzzer=P3^7;

sbit led=P1^7;

sfr p0=0x80;sfr p1=0x90;

sfr p2=0xA0;

sfr p3=0xB0;

unsigned char temp,input,i;

void main()

{TMOD=0x21;

TH1=0xFD;

SCON=0x50;

TR1=1;


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TR1=1;

lcd_command(0x01);

lcd_command(0x0E);

lcd_command(0x38);

lcd_command(0x80);

buzzer=1;

while(RI==0);

temp=SBUF;

RI=0;

input=temp;lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;


while(RI==0);

temp=SBUF;

RI=0;


while(RI==0);


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while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

while(RI==0);

temp=SBUF;

RI=0;

input=temp;

lcd_data(input);

delay(3);

lcd_command(0x80);

lcd_str(" Second Vehicle ");

while(1)


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while(1)

{

lcd_command(0xC0);

lcd_str(" ");

lcd_command(0xC0);

while(RI==0);temp=SBUF;

RI=0;

input=temp;

if(input=='B')

{

lcd_str("amb : way please");delay(14);

for(i=0;i


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void lcd_str(unsigned char disp)

{

int x;

for(x=0;disp[x]!='\0';x++)

{

lcd_data(disp[x]);

}

}

void lcd_command(unsigned char a)

{

p2=a;

rs=0;

rw=0;

en=1;delay(1);

en=0;

}


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void lcd_data(unsigned char b)

{

p2=b;

rs=1;

rw=0;en=1;

delay(1);

en=0;

}

void delay(unsigned int n)

{

int i;

for(i=0;i


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Microcontroller -AT89S52

Microcontroller is a microprocessor designedspecifically for control applications, and isequipped with ROM, RAM and facilities I / O

on a single chip. AT89S52 is one of the family MCS-51/52

equipped with an internal 8 Kbyte FlashEPROM (Erasable and Programmable Read

Only Memory), which allows memory to bereprogrammed.


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AT89S52 Microcontroller Features :

A CPU (Central Processing Unit) 8 Bit. 256 bytes of RAM (Random Access Memory) internally. Four-port I / O, which each consist of eight bits the internal oscillator and timing circuits. Two timer / counters 16 bits Five interrupt lines (two fruits and three external interrupt

internal interruptions). A serial port with full duplex UART (Universal Asynchronous

Receiver Transmitter). Able to conduct the process of multiplication, division, and

Boolean. the size of 8 KByte EPROM for program memory. Maximum speed execution of instructions per cycle is 0.5 s at 24

MHz clock frequency.If the microcontroller clock frequency used is 12 MHz, the speed is1 s instruction execution


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Pin Configuration

Th f ti f h i AT89S52 i


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The function of each pin AT89S52 is:Pin 1 to 8 (Port 1) is an 8-bit parallel port of a two-way (bidirectional) that can be used for different

purposes (general purpose).

Pin 9 is a pin reset, reset is active if a high ration.

P3.0 (10): RXD (serial port data receiver) P3.1 (11): TXD (serial port data sender)

P3.2 (12): INT0 (external interrupt 0 input, active low)

P3.3 (13): INT1 (ekstrernal an interrupt input, active low)

P3.4 (14): T0 (external input timer / counter 0)

P3.5 (15): T1 (external input timer / counter 1)

P3.6 (16): WR (Write, active low) control signal from port 0 write data to memory and input-output

data externally. P3.7 (17): RD (Read, active low) control signal of the reading of input-output data memory

external to the port 0. XTAL pin 18 as the second, the output is connected to the crystal oscillator.

XTAL pin 19 as the first, high berpenguatan input to the oscillator, connected to the crystal.

Pin 20 as Vss, is connected to 0 or ground on the circuit.

Pin 21 to 28 (Port 2) is 8 bits parallel ports in both directions. This port sends the address byte when

accessing external memory is carried on.

Pin 29 as the PSEN (Program Store Enable) is the signal used for reading, move the program theexternal memory (ROM / EPROM) to microcontroller (active low).

Pin 30 as the ALE (Address Latch Enable) to hold down the address for accessing external memory.

This pin also functions as a prog (active low) that is activated when the internal program flash

memory on the microcontroller (on chip).

Pin 31 as the EA (External Accesss) to select the memory to be used, the internal program memory

(EA = Fcc) or external program memory (EA = Vss)


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ZigBee Protocol

ZigBee is a

Networking Protocol

that Rides on top of

the IEEE 802.15.4Radio Protocol

802.15.4 Specifications

Supported Networks Point-Point

Point-Multipoint/Star

Types of Nodes

Coordinator End Node

Reliable Delivery

CSMA/CA

MAC-level (pt-pt)

Retries/Acknowledgments

64-bit IEEE and 16-bit short

Addressing

16 DSSS RF Channels


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802.15.4 Protocol


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ZIGBEE SPECIFICATIONS

Addressing

64-bit IEEE Address

Unique to every 802.15.4 device in the world

Permanent, assigned during mfg

16-bit Network Addressing

Unique to each module within a PAN

Used in Routing Tables

Used for data transmissions, etc.

Volatile Address - Can Change


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ZIGBEE PROTOCOL NEEDS/USES

802.15.4 Data Transmission modesBroadcast Mode

To send a broadcast packet to all radios regardless

of 16-bit or 64-bit addressing

Unicast ModeGuaranteed Delivery 64-bit IEEE Addressing

Destination 64-bit Address to match 64-bit source

address of intended receiver.

16-bit Network Addressing

Destination 16-bit Address to match 16-bit source

address of intended receiver


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PAN NETWORK FORMATION

Coordinator must select an unused operating

channel and PAN ID

Energy scan on all channels

Sends Beacon request (Broadcast PAN ID)

Listens to all responses and logs the results

After the Coordinator has started, it will allow

nodes to join to it for a time based on the

specified Node Join Time

C


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ROUTER STARTUP

A new Router must locate a Router that has

already joined a PAN or a Coordinator

Sends a Broadcast PAN ID on each channel Returns sent via Unicast

Router will then try to join to a Router or

Coordinator that is allowing joining

R


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END NODE: LOW-POWER SLEEP MODES

End Node Startup

A new End node must locate a Router that has

already joined a PAN or a Coordinator

Sends a Broadcast PAN ID on each channel

Returns sent via Unicast

End node will then try to join to a parent (Router

or Coordinator) that is allowing joining

E


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42

UART PIN CONNECTION

DB-9 9-Pin Connector


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43

RxD and TxD pins in the 8051

RxD and TxD pins in the 8051

8051 has two pins used for transferring and receiving data

serially

TxD and RxD are part of the port 3 group

pin 11 (P3.1) is assigned to TxD

pin 10 (P3.0) is designated as RxD

these pins are TTL compatible

require a line driver to make them RS232 compatible

driver is the MAX232 chip


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44

8051 CONNECTION TO RS232

MAX232:

converts from RS232 voltage levels to TTL voltage levels

uses a +5 V power source

MAX232 has two sets of line drivers for transferring andreceiving data

line drivers used for TxD are called T1 and T2

line drivers for RxD are designated as R1 and R2

T1 and R1 are used together for TxD and RxD of the 8051

second set is left unused


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8051 CONNECTION TO RS232

(a) Inside MAX232

1st Rev Road Ragging

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