1. CAN PROTOCOL Characterization Presentation
supervisor : Oren Kerem
performer :
Ohad Gidon , Ilan Degani

2. Block Diagram Led New CAN element Tran ALTERA PS Old vhdl PCI
Computer
ALTERA
Led PS
New
element
CAN
Tran
Old vhdl
PCI
connection

3. CAN protocol major characterization
System flexibility - Nodes may be added to the CAN without requiring any change .
Multicast – any number of nodes may receive and act simultaneously upon the same message .
Multi master – the node with the highest priority to be transmitted gains bus access .
Data integrity – signaling and self checking in every CAN node .
Fault confinement – defective node are switched off .

4. CAN Protocol- frames There are four Frame type : Data frame :
Remote frame : S O F
Arbitration
Field
Data
CRC
ACK
EOF
12 Bit
6 Bit
0 to 8 Byte
16 Bit
2 Bit
7 Bit
1Bit
Control S O F
Arbitration
Field
CRC
ACK
EOF
12 Bit
6 Bit
16 Bit
2 Bit
7 Bit
1Bit
Control

5. CAN Protocol - frames Error frame : Flags type: Type of error :
Passive
Active
Type of error :
Bit error
Stuff error
CRC error
Form error
Acknowledgement error
Error flag
Superposition of
error flags
Error
Delimiter
6 Bit
8 Bit
Max 12 Bit

6. CAN Protocol - frames Overload frame : Interframe space :
overload flag
Superposition of
overload flags
overload
Delimiter
6 Bit
8 Bit
Max 12 Bit
3 Bit
intermission
Bus idle
Suspend
transmission
8 Bit
intermission
Bus idle
3 Bit

7. Block diagram
Top :

8. Block diagram
Nodes configuration

9. Block diagram
Slave_master

10. Block diagram
Receive

11. Block diagram
Transmit

12. Schedule DATE DESCRIPTION 15.12.02-21.12.02 BUILD CONTROL BLOCK–
TESTING THE EVALUATION BOARD –
SIMULATION –
SYNTHESYS + TEST THE PROGRAM ON THE EVALUATION BOARD