progress seminar 2

7/31/2019 Progress Seminar 2

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BLOCK DIAGRAM

SENSORS MICROCONTROLLER

MOTORCONTROLLER

LEFTMOTOR

RIGHTMOTOR


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BLOCK DIAGRAM OF 89C51


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89C51

The ATmel 89C51 is a low-power,high-performance CMOS 8-bitmicrocomputer with 4K bytes of

Flash programmable and erasableread only memory (PEROM). TheATmel 89C51 device is manufactured

using Atmels high-densitynonvolatile memory technology andis compatible with the industry-standard MCS-51 instruction set andpinout. The on-chip Flash allows the


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FEATURES OF 89C51

Compatible with MCS-51 Products

4 Kbytes of In-System

Reprogrammable Flash Memory.Endurance 1,000 Write/EraseCycles

Fully Static Operation: 0 Hz to 24MHz

Three-Level Program Memory Lock

128 x 8-Bit Internal RAM


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PIN DIAGRAM


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PIN CONFIGURATIONS

Vcc pin 40

Vcc provides supply voltage to the

chip.The voltage source is +5V.

GND pin 20 ground

XTAL1 and XTAL2 pins 19,18

XTAL 1: input to the invertingoscillator amplifier and input to the

internal clock operating circuit.


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RST pin 9 reset

It is an input pin and is active high

normally low

.The high pulse must be high at least

2 machine cycles.

It is a power-on reset. Upon applying a high pulse to RST,

the microcontroller will reset and all

values in registers will be lost.


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EA/Vpp pin 31 external access

There is no on-chip ROM in 8031 and

8032 .The /EA pin is connected to GND to

indicate the code is stored externally.

/PSEN ALE are used for externalROM.

For 8051, /EA pin is connected to

Vcc.


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Pins of I/O Port

The 8051 has four I/O ports

Port 0 pins 32-39 P0 P0.0

P0.7

Port 1 pins 1-8 P1 P1.0 P1.7

Port 2 pins 21-28 P2 P2.0 P2.7

Port 3 pins 10-17 P3 P3.0

P3.7


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Other Pins

P1, P2, and P3 have internal pull-upresisters.

P1, P2, and P3 are not open drain. P0 has no internal pull-up resistors

and does not connects to Vcc inside

the 8051. P0 is open drain.

Compare the figures of P1.X and

P0.X.


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SENSORS

The sensor measures some attribute of theworld.

The term transducer is often used

interchangeably with sensor. A transduceris the mechanism, or element, of thesensor that transforms the energyassociated with what is being measuredinto another form of energy.

A sensor receives energy and transmits asignal to a display or computer. Sensorsuse transducers to change the input signal

(sound, light, pressure, temperature, etc.)into an analo or di ital form ca able of


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Type of Sensors


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Type of Sensors


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I R Sensor

In IR sensor there is emitter and detector. Emitteremits the IR rays and detector detects it.

Sensor behavior if there is an object of Blue andBlack color


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L293D

The principle of the robot is based onsensing the background surfacemaking use of IR sensor. Basically IRsensor takes input by detecting thereflection of the IR rays from the

surface and accordingly gives itsoutput to the motors. The output ofthe sensors are not directly fed to the

motors instead a L293D IC is used in


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L293D IC is a dual H-bridge motordriver IC. One H-bridge is capable todrive a dc motor in bidirectional.

L293D IC is a current enhancing IC asthe output from the sensor is notable to drive motors itself so L293D

is used for this purpose. L293D is a16 pin IC having two enables pinswhich should always be remain highto enable both the H-bridges.


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PIN DIAGRAM OF L293D


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WORKING MODEL


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ABOUT THE ROBOT

The robot will be a edge avoiderrobot. Apart from that we will try toincorporate some extra features like

finding out the survivor.


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BURNER USED

The burner used is sunrom. It is a fullfeatured low cost programmer. Theprogrammer works on usb ports and

can be used with laptops. It comeswith a full featured sotware whichallows batch programming and saves

time. It is compatible most versionsof window-98/2000/XP/vista/7.

M lti b ti


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Click to edit Master subtitle style

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Multipurpose roboticsystem

more functions will be added during the development phase

Functions

Movement Edgeavoiding


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Progress till now.Date: 1/2/12 -----Topic selection

Multipurpose robotic system

Date:4/2/12 ----- Selection & procurement of Microcontroller

AT89C51 & AT89S51

Date:8/2/12 ----- Test of 8051 programmer

Programmer used:--USB LOW COST 8051Programmer for

Atmel 89XXX series

----- Tested on 64bit windows 7 system

----- IC detection failed

Date:22/2/12 -----Programmer tested on 32bit windows XP/7

----- Detection failed


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Date: 10/3/12 ----12MHz Quartz Crystal was procured.

---- Its used for frequency stabilizationof the clock

signal of the microcontroller.

Date:13/3/12 -----The DEMO program that was burnt

successfully on

6th March12 was implemented onbread board.

Result : LEDs did glow !!

Note: The days that are not mentioned here,were utilized in the study of the instructions of


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Video showing LED glow

progress seminar 2

Documents