1. Presentation on
Embedded System & Robotics
Submitted To:- Submitted By:-
Mr Tajender Malik Neeraj Khatri
926/ECE/10
H.O.D. (ECE)

2. Introduction
Embedded System:-
◦ Type of Computer System
◦ Combination of microprocessor based
hardware & suitable software

3. Different Embedded Based Devices

4. Microprocessor
 Is a device which performs Arithmetic & Logic Operations.
◦ No inbuilt RAM
◦ No inbuilt ROM
◦ No inbuilt I/O ports
◦ Bulkier & Expensive

5. Microcontroller
 isdefined as combination of Microprocessor & its external
units.
◦ Inbuilt RAM
◦ Inbuilt ROM
◦ Inbuilt I/O ports

6. 8051 Microcontroller
8-bit processor
128-byte of RAM
4-Kilobyte of onchip ROM
Two Timers
4 I/O ports
1 Serial port
6 interupts

7. Internal Architecture
CPU
◦ ALU
◦ CU
◦ MU
3 Buses
◦ Data bus
◦ Address bus
◦ Control bus

8. Pin Diagram
AT89C51 IC is a 40 pin IC.
DIP (Dual In-line package)
4 ports
2 supply pins
2 crystal pins
1 reset pin
3 control signal

9. Interrupts
Any kind of emergency is called Interrupts.
◦ 6 interrupts
 RST 0000H
 INT0 0003H
 TF0 000BH
 INT1 0013H
 TF1 001BH
 Serial (TI & RI) 0023H

10. Project
DTMF based ROBO Car
◦ On pressing 2, the robot will move forward
◦ On pressing 4, the robot will turn left
◦ On pressing 6, the robot will turn right
◦ On pressing 8, the robot will move
backwards
◦ On pressing 5, the robot will stop

11. Electronics Part
1H bridge
DTMF decoder
8051 Microcontroller

12. Mechanical Part
Plywood Board 9cm x 7cm
2 DC motor 12V, 100rpm
2 Simple Wheels
1 Caster Wheel
Nut & Bolts
2 Clamper

14. Assembly of all parts

15. Program
M1CW EQU P0.0
M1CCW EQU P0.1
M2CW EQU P0.2
M2CCW EQU P0.3
ORG 0000H
MAIN: MOV A,P2
CJNE A,#0F2H,NXT1
AJMP FWD
NXT1: CJNE A,#0F4H,NXT2
AJMP LFT
NXT2: CJNE A,#0F8H,NXT3
AJMP REW
NXT3: CJNE A,#0F6H,NXT4
AJMP RGT

16. NXT4: CJNE A,#0F5H,MAIN
AJMP STP
FWD: SETB M1CCW
SETB M2CCW
CLR M1CW
CLR M2CW
AJMP MAIN
REW: SETB M1CW
SETB M2CW
CLR M1CCW
CLR M2CCW
AJMP MAIN
RGT: SETB M1CCW
SETB M2CW
CLR M1CW
CLR M2CCW
AJMP MAIN

17. LFT: SETB M1CW
SETB M2CCW
CLR M1CCW
CLR M2CW
AJMP MAIN
STP: MOV P0,#11111111B
AJMP MAIN