Design of Controller Area Network1

7/21/2019 Design of Controller Area Network1

1/22

DESIGN OF CAN FOR

SENSOR NETWORK APPLICATIONS

GUIDED BY,

SUNIL KUMAR K.H

ASSISTANT PROFESSOR

CMRIT

SUBMITTED BY

SHALINI D

1CR11EC101


2/22


3/22

Need of CAN

In the be!nn!n...

En!neC"nt#"$

T#%n&'!&&!"n

C"nt#"$

Ant!($")*

B#e%*C"nt#"$

A)t!+e

S&-en(

&!"n

D%&h(b"%#

L!ht!n

P"/e# Se%t&

A!#C"n!t!"n

A!#b%

!e#ent )"nt#"$ &&te'& 2%n the!# &en&"#&3 t" e4)h%ne !n"#'%t!"n.

% )%b$e net/"#* /!th % $enth " - t" &e+e#%$ '!$e&%n '%n )"nne)t"#& /%& #e5!#e.

#"/!n -#"b$e'& )"n)e#n!n '%te#!%$ )"&t, -#")t!"n t!'e %n #e$!%b!$!t.


4/22

S"$t!"n...

Need of CAN

EngineControl

Transmission

Control

Anti-lock

Break

Control

A)t!+e

S&-en(

&!"n

D%&h(b"%#

L!ht!n

Power Seats

Air

Condition

Airbag

High Speed low Speed

CAN

CAN

CAN

CAN

CAN

CAN

CAN

CAN

C

AN

C

AN

-"!nt(t"(-"!nt /!#!n !& #e-$%)e b "ne &e#!%$ b& )"nne)t!n %$$ )"nt#"$ &&te'&.

CAN


5/22


6/22

CAN NETWORK

A CAN net/"#* )"n&!&t& " % n'be# " CAN n"e& /h!)h %#e $!n*e +!% %

-h&!)%$ t#%n&'!&&!"n 'e!' 2CAN b&3.

At the ends of the CAN network, bs termination resistors contribte to

pre!enting transient phenomena "reflections#$

A '%4!'' net/"#* e4ten&!"n " %b"t 80 'ete#& !& %$$"/e.

ISO 11979 &-e)!!e& the '%4!'' n'be# " CAN n"e& %& ;


7/22

CAN NODE

A--$!)%t!"n

H"&t(C"nt#"$$e#

CAN(C"nt#"$$e#

CAN(T#%n&)e!+e#

CAN(B&

An ECU th%t -e#"#'& !t& t%&*& !n % CAN net/"#* !& #ee##e t" %& % CAN n"e.

E+e# n"e )"n&!&t& " % H"&t2M!)#")"nt#"$$e#3 , CAN )"nt#"$$e# %n % CAN

t#%n&)e!+e#.


8/22

There are two bus states, called "doi!a!t" a!d "recessive"

The bus lo#ic uses a "Wired-AND" echa!is, that is, "doi!a!t bits"

$e%uivale!t to the lo#ic level "&ero"' overwrite the "recessive" bits$e%uivale!t to the lo#ic level "O!e" '

O!l( if all !odes tra!sit recessive bits $o!es', the )us is i! the

recessive state

CAN )*S +OC


9/22

CAN .ORSENSOR NETWORKS


10/22

B&(%))e&& b 'e&&%e -#!"#!tCarrier Se!se /ulti0le Access 1 Collisio! Resolutio!

B& %))e&& )"n$!)t& #e&"$+e b %#b!t#%t!"n

)it-wiseNo!-destructive

Allows for #uara!teed late!c( tie

Me&&%e !ent!!e#CAN has !o !ode addresses

CAN .or Se!sor Networ2s


11/22

E4ten&!+e ERROR )he)*!n.ive differe!t chec2s

Ever( co!!ected !ode 0artici0ate

D%t% )"n&!&ten) &e)#e

A essa#e is acce0ted b( all !odes or !o!e

CAN .or Se!sor Networ2s

D!e#ent B& M%n%e'ent Meth"&

)it-wise arbitratio!

/aster1Slave

Dais( Chai!

TD/A


12/22

CAN .RA/N


13/22


14/22

"3ello ever(o!e, here4s soe data labeled 5, ho0e

(ou li2e it6"

CAN DATA .RA/E

Data fraes serve to tra!sit the user data


15/22

CAN RE/OTE .RA/E

>He$$" e+e#"ne, )%n &"'eb" -$e%&e

-#")e the %t% $%be$e ?@>

Similar to a Data Frame, but without Data Field

Remote Transmission Request (RTR) bit isrecessive

Same identifier as the Data Frame which is requested

Note: When Remote Frame is transmitted at the same time ascorresponding Data Frame, Data Frame wins arbitration because ofdominantRTR

bit

Used to request transmission of a specific Data Frame


16/22

H"/ !& &e Re5e&t F#%'e

N"e

A

N"e

B"!$ te'-.&en&"#

H"/ h"t !& "!$ @Re'"te F#%'e ID "!$!

97"CD%t% F#%'e ID "!$!

97"C

Reote .rae


17/22

DESN /ET3ODO+O7


18/22

DESN O. CAN CONTRO++ER

DESN /ET3ODO+O7


19/22

CAN !& &e !n % /!e %#e% " %--$!)%t!"n&

At"'"t!+e Me!)%$

F%)t"# %t"'%t!"n R%!$/%

M%#!t!'e M%)h!ne )"nt#"$

B!$!n %t"'%t!"n

CAN

Applications


20/22

Brakes

Dashboard

Power

windows

Central locking

Engine

Airbag

Mirrors

Gearbox

Lights

Air conditioning

C%# B" )"'-"nent&T(0icall( low-s0eed CAN )us

P"/e# T#%!n )"'-"nent&T(0icall( hi#h-s0eed CAN )us

Applications


21/22

Questions ?


22/22

Design of Controller Area Network1

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