1. By
S.Ranjitha

2. To transmit the data from CAN transmitter to
CAN receiver and simultaneously from
Zigbee transmitter to receiver.

3. BLOCK DIAGRAM
A
TEMPERATURE T
M
LCD
SENSOR
E
G
CAN
FIRE A
CONTROLLER AND DRIVER
SENSOR 3
2
POWER ZIGBEE
PC RECEIVER
SUPPLY
MAX23 A
ZIGBEE
T CAN
TRANSMITTER 2 CONTROLLER AND DRIVER
M
E
G
DC MOTOR
LCD
A
L293D
3
2

4.  LM35 is a precision IC temperature
sensor with its output proportional to
the temperature (in oC).
 The operating temperature range is from
-55°C to 150°C.

5. This fire sensor circuit exploits the
temperature sensing property of an
ordinary signal diode IN 34 to detect
heat from fire.

6.  Mini-Computer
 Microprocessor
 The Brains
 Arithmetic Logic Unit (ALU)
 Control Unit
 Program/ Data Storage
 Peripherals (Input/Output)
 Low-Cost

8. High-performance, Low-power AVR 8 bit
microcontroller
RISC architecture
The ATmega32 has 32 GPIO
 32K Bytes of In-System Self-Programmable Flash
memory
2 KB RAM.
1024 Bytes EEPROM
Programmable Serial USART

10. Bit 1 – Z: Zero Flag
Bit 0 – C: Carry Flag
Bit 7 – I: Global Interrupt Enable
Bit 5 – H: Half Carry Flag
Bit 6 – T: Bit Copy Storage
Bit 4 – S: Sign Bit, S = N ⊕V
Bit 2 – N: Negative Flag
Bit 3 – V: Two’s Complemenr
Overflow Flag
Bit 1 – Z: Zero Flag
Bit 0 – C: Carry Flag

13. Conventional multi-wire looms CAN bus network
vs.

14. NODE
MCU I/O
CAN CONTROLLER
NODE CAN NODE
TRANSCEIVER
120 ohms
120 ohms

15. 15

16. APPLICATION
LAYER
PRESENTATION
LAYER
SESSION LAYER
TRANSPORT
LAYER
NETWORK
LAYER
DATA LINK LOGICAL LINK CONTROL
LAYER MEDIUM ACCESS CONTROL
PHYSI
PHYSICAL SIGNALING
CAL PHYSICAL MEDIUM ATTACHMENT
LAYER MEDIUM DEPENDENT INTERFACE

17. • The CAN protocol controller outputs a
serial data stream to the logic TXD input
of the MCP2551. The corresponding
TRANSMIT recessive or dominant state is output on
the CANH and CANL pins.
• The MCP2551 receives dominant or
recessive states on the same CANH and
CANL pins as the transmit occurs. These
states are output as logic levels on the
RECEIVE RXD pin for the CAN protocol controller to
receive CAN frames.
• A logic „1‟ on the TXD input turns off the
drivers to the CANH and CANL pins and the
RECESSIVE pins “float” to a nominal 2.5V via biasing
resistors.
STATE
• A logic „0‟ on the TXD input turns on the
CANH and CANL pin drivers.
DOMINANT

18. CONFIGURATION MODE
NORMAL MODE
SLEEP MODE
LISTEN –ONLY MODE
LOOP BACK MODE

19. CAN 2.0A (“standard CAN” 11-bit ID) Data Frame.
 CAN 2.0B (“extended CAN” 29-bit ID) Data Frame.
19

20. CSMA/CD NDA – Carrier Sense Multiple Access/Collision avoidance by Non
Destructive arbitration
20

21. Transmission Characteristics

21

22. What is ZigBee?
Technological Standard Created for Control and
Sensor Networks
Based on the IEEE 802.15.4 Standard
Created by the ZigBee Alliance
Wireless personal area networks (WPANs)
High level communication
Frequency band up to 2.5 GHz

23.  Data rates of 20 kbps and up to 250 kbps
 Support for Low Latency Devices
 CSMA-CA Channel Access
 Handshaking
 Low Power Usage consumption
 3 Frequencies bands with 27 channels
 Extremely low duty-cycle (<0.1%)
 Supports large number of nodes
 Easy to deploy
 Very long battery life
 Secure
 Low cost
 Can be used globally

25. IEEE 802.15.4
Physical layer
•Activation and deactivation of the radio
transceiver
•Energy detection
•Link quality indicator
•Channel frequency selection
•Data transmission and reception
•CSMA-CA
MAC layer
•Generating network beacons
•Synchronizing
•PAN association and disassociation
•Device security
•GTS mechanism
•Reliability

26. IEEE Zigbee
802.15.4 device roles
device roles
FFD RFD
Coordinator Router End device
PAN
Coordinator device
coordinator

27. Data transfer models
Peer to peer
Star
mesh

28. Functional Overview
• Superframe structure
• Data transfer model
• Frame structure
• Improving probability of successful delivery
• Power consumption considerations
• Security

31. ZigBee Profiles:
Device Profile
Application Profile

32. Discard route
request
B
req. C
route
a
req.
route route reply T
S
req.
rou
te r route
eq. D
rou
te r
eq.
Unicast
Broadcast
Without routing capacity

33. MAX232 Schematic Diagram

34. CONCLUSION AND FUTURE SCOPE
In this application CAN uses multiple transmitter nodes to
acquire data from sensors and transmit the data in packets over a
CAN bus. Each transmitter consists of an AT Mega32 micro
controller. The CAN packets are received by a single receiver node
and stored to a secure digital card (SD Card) by using SPI protocol.