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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