Integration of CAN Protocol in Automotives

7/31/2019 Integration of CAN Protocol in Automotives

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Integration of CAN Protocol in

Automotives

A Project Report

Submitted by

SENTHIL NATHAN.P 52206106075

SHANKARA NARAYANA SHARMA.P 52206106076

SUNDAR.L 52206106082

Under the guidance ofMr.M.Nagarajan, M.E.,M.S.S.I., M.I.S.T.E.,Asst. Prof. / ECE,P.T.Lee Chengalvaraya Naicker College of Engineering and Technology,

Department of Electronics & Communication,

Oovery, veliyur (post) -631 502,

Kancheepuram.


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Origin from: 978-1-4244-2800-7/09

2009 IEEE

RESEARCH ON EMBEDDED DATA DISPLAY UNIT BASED ON CAN

PROTOCOL

Peng Yang, Le Yang, Xin Guo,

College of Electrical Engineering andAutomation,

Hebei University of Technology

Tianjin, China.

e-mail: [email protected]


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ABSTRACT

During the journeys at night times it may

fail to know about the outer environment such

as vehicle data , place of journey and so on,

since the interaction between inner and outer

environment is closed.

Cont


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In automobiles, the dash boards has

many measuring units, such as Pressure

gauge, Temperature gauge with

numerous cables for inter-connection,

which leads to cable complexity, the

physical length of cables and otherdefects in communication.

Cont


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To overcome those problems, the

CAN Protocol based multiplexed

system is proven for the reliability andreal-time performance of the data

transmitted on CAN bus is appropriate

to all Vehicular Automotive applications.


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Vehicle Buses..?

Why buses in vehicles?

Number of electronic equipment is increasing heavily in

vehicles (expensive wiring)

Modern vehicles control system needs a lot of information

from sensors

Easier fault diagnostic (tester can be connected to a single

plug)


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Wire Length


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Conventional Networking


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Proposed System will Overcome.

Existing protocols didnt support multi-

mastersText based communication

Low baud-rates even at higher distances

Poor error detection & management


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CAN Networking


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KEY CHARACTERISTICS OF CAN

CAN means Controller Area Network

CAN is an asynchronous serial communication

protocol

Multi-master concept

o CSMA/CA (Carrier Sense Multiple Access /

Collision Avoidance)

o Message priority

Object-oriented communication


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No node addressing, but content

identification

Real-time capability

Low message transfer latencySystem wide message consistency

Error detection & management

mechanism


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Features of ARM Controller

Philips ARM7TDMI LPC2129 microcontroller

with 256 Kbyte program Flash, 16 Kbyte

SRAM, and 2 CAN communication channels

Two interconnected CAN interfaces with

advanced acceptance filters & Four channel

10-bit A/D converter with conversion time as

low as 2.44 us.

Vectored Interrupt Controller with

configurable priorities and vector addresses.


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Features of A/D converter

The LPC2129 contain single 10-bit successive

approximation analog to digital converter with four

multiplexed channels.

Measurement range of 0 V to 3 V. Capable of performing more than 400,000 10-bit

samples per second.

Burst conversion mode for single or multiple inputs. Optional conversion on transition on input pin or

Timer Match signal.


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Features of LM35

Calibrated directly in Celsius (Centigrade)

Linear + 10.0 mV/C scale factor

0.5C accuracy guarantee able (at +25C)

Rated for full 55 to +150C range

Operates from 4 to 30 volts

Less than 60 A current drain

Low self-heating, 0.08C in still air

Nonlinearity only 14C typical

Low impedance output, 0.1 W for 1 mA load


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The Temperature Sensor


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SCHEMATIC OF THE PROJECT


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The engine, airbag and displacement nodes

are continuously monitored on priority

basis.

Engine temperature will be continuously

monitored and when maximum heat

reaches, the coolant fan will be controlled.

Front end pressure is monitored to activate

the airbag control.

Displacement is measured to display the

place of travelling for the passenger

attention.


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FLOW CHART OF PROJECT

IMPLEMENTATION


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A Full-CAN protocol is implemented in aconvenient embedded Microcontroller to

automate the dash-board display.

Every node of the CAN bus is controlled by theCAN transceiver MCP2551 chip.

Each analog inputs are converted to bytes of

message like CAN headers and broadcasted to

the CAN bus.


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CAN TRANSCEIVER


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The CAN peripheral automatically

scans every incoming CAN

message and when an identifier

match is detected, the message iscopied into the associated

received buffer.


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Scope of the Project

Implementation of advanced

communication protocols in the

automotive and industrial longdistance areas will much sophisticated

and provides data monitoring with

improved efficiency as much as othercommunication protocols.


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THANK YOU


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LCD DISPLAY MODULE

I CO IGU A IO O CO OLL


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PIN CONFIGURATION OF CONTROLLER

Integration of CAN Protocol in Automotives

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