Fina Synopsis

TABLE OF CONTENTS
ITEMS PAGE NO.
CHAPTER- 1 INTRODUCTION...................................................2
CHAPTER- 2 LITERATURE REVIEW......................................3
CHAPTER- 3 PROJECT WORK...............................................4-7
CHAPTER- 4 RESULT...................................................................8
CHAPTER- 5 CONCLUSION AND FUTURE SCOPE...............9
CHAPTER- 6 REFRENCES ........................................................10
1
CHAPTER 1
INTRODUCTION:-
Embedded systems are not always standalone devices. Many embedded systems consist of
small, computerized parts within a larger device that serves a more general
purpose features an embedded system for tuning the strings, but the overall purpose of the
Centrally controlled is, of course, to play music. Similarly, an embedded system in an
automobile provides a specific function as a subsystem of the car itself. Many methods
evolved for centrally controlled. Either by software or directly by hardware. Software
controlling needs computers which are bulky and common man cannot afford for it, so
hardware controls are in use. Even in hardware if it is programmable device then it is
preferred because it can be modeled according to the requirements of the user.
Embedded systems are designed to do some specific task, rather than be a general-purpose
computer for multiple tasks. Some also have real time performance constraints that must
be met, for reasons such as safety and usability; others may have low or no performance
requirements, allowing the system hardware to be simplified to reduce costs.
Physically, embedded systems range from portable devices such as digital watches and
MP3 players, to large stationary installations like traffic lights, factory controllers, or the
systems controlling nuclear power plants. Complexity varies from low, with a single
microcontroller chip, to very high with multiple units, peripherals and networks mounted
inside a large chassis or enclosure.
2
CHAPTER 2
LITERATURE REVIEW
Embedded systems control many devices in common use today. Embedded systems are
controlled by one or more main processing cores that are typically either microcontrollers
or digital signal processors. Many methods evolved for centrally controlled. Either by
software or directly by hardware. Software controlling needs computers which are bulky
and common man cannot afford for it, so hardware controls are in use. Even in hardware if
it is programmable device then it is preferred because it can be modeled according to the
requirements of the user.
3
CHAPTER 3
PROJECT WORK:
BLOCK ILLUSTRATION :-
FIG3.1(BLOCK DIAGRAM)
4
DEPICTION :-
If we press any key of the key board then , then the coded sequence passes through the
serial port port interphase via the hyper terminal as the link between the two devices to be
interphased , so the coded sequence is decoded by the controller , and is displayed on the
lcd via the portd of pic controller.
The circuit consists three Blocks:
1. INPUT ( key board )
2. SERIAL PORT INTERPHASE
3. INPUT SECTION
4. CONTROLLER SECTION
5. LCD DISPLAY
5
TABLE 3.1
USART DESCRIPTION : -
The Universal Synchronous Asynchronous Receiver Transmitter (USART) module is one
of the two serial I/O modules. (USART is also known as a Serial
Communications Interface or SCI.) The USART can be configured as a full-duplex

asynchronous system that can communicate with peripheral devices, such as CRT
terminals and personal computers, or it can be configured as a half-duplex synchronous
system thatcan communicate with peripheral devices, such as A/Dor D/A integrated
circuits, serial EEPROMs, etc.
The USART can be configured in the following modes:
• Asynchronous (full-duplex)
• Synchronous – Master (half-duplex)
• Synchronous – Slave (half-duplex)
Bit SPEN (RCSTA<7>) and bits TRISC<7:6> have to be set in order to configure pins
RC6/TX/CK and RC7/RX/DT as the Universal Synchronous Asynchronous Receiver
Transmitter.
FIG3.2(CIRCUIT DIAGRAM)
6
Advantages of using PIC over other controlling devices for
controlling the DC motor are given below:
1. SPEED: The execution of an instruction in PIC IC is very fast (in micro seconds)
and can be changed by changing the oscillator frequency. One instruction generally takes
0.2 microseconds.
2. COMPACT: The PIC IC will make the hardware circuitry compact.
3. RISC PROCESSOR: The instruction set consists only 35 instructions.
4. EPROM PROGRAM MEMORY: Program can be modified and rewritten

very easily.
5. INBUILT HARDWARE SUPPORT: Since PIC IC has inbuilt
programmable timers, ports and interrupts, no extra hardware is needed.
6. POWERFUL OUTPUT PIN CONTROL: Output pins can be driven to

high state, using a single instruction. The output pin can drive a load up to 25mA.
7. INBUILT I/O PORTS EXPANSIONS: This reduces the extra IC’s which
are needed for port expansion and port can be expanded very easily.
8. INTEGRATION OF OPERATIONAL FEATURES: Power on reset

and brown/out protection ensures that the chip operates only when the supply voltage is
within specification. A watchdog timer resets PIC if the chip ever malfunctions and
deviates from its normal operation
PWM Mode (PWM):

In Pulse Width Modulation mode, the CCPx pin produces up to a 10-bit resolution PWM
output. Since the CCP1 pin is multiplexed with the PORTC data latch, the TRISC<2> bit
must be cleared to make the CCP1 pin an output.
7
CHAPTER 4
RESULT
This project develops a scheme to centrally control the appliances in the industry.
If we press any key of the key board then , then the coded sequence passes through the
serial port port interphase via the hyper terminal as the link between the two devices to be
interphased , so the coded sequence is decoded by the controller , and is displayed on the
lcd via the portd of pic controller.There are many advantages including saving of time and
money.
8
CHAPTER 5
CONCLUSION AND FUTURE SCOPE
Many methods evolved for centrally controlled. Either by software or directly by

hardware. Software controlling needs computers which are bulky and common man
cannot afford for it, so hardware controls are in use. Even in hardware if it is
programmable device then it is preferred because it can be modeled according to the
requirements of the user.
9
CHAPTER 6
REFRENCES
• Mazidi And Mazidi”microcontrollers”
• Ayala “Microcontrolles& its Interfacing”
• www.wikipedia.com
• www.123eng.com
10

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TABLE OF CONTENTS

ITEMS PAGE NO.

CHAPTER- 2 LITERATURE REVIEW......................................3

CHAPTER- 3 PROJECT WORK...............................................4-7

CHAPTER- 5 CONCLUSION AND FUTURE SCOPE...............9

CHAPTER- 6 REFRENCES ........................................................10

lcd via the portd of pic controller.

The circuit consists three Blocks:

1. INPUT ( key board )

2. SERIAL PORT INTERPHASE

Communications Interface or SCI.) The USART can be configured as a full-duplex

The USART can be configured in the following modes:

• Synchronous – Master (half-duplex)

• Synchronous – Slave (half-duplex)

2. COMPACT: The PIC IC will make the hardware circuitry compact.

3. RISC PROCESSOR: The instruction set consists only 35 instructions.

4. EPROM PROGRAM MEMORY: Program can be modified and rewritten

5. INBUILT HARDWARE SUPPORT: Since PIC IC has inbuilt

programmable timers, ports and interrupts, no extra hardware is needed.

6. POWERFUL OUTPUT PIN CONTROL: Output pins can be driven to

8. INTEGRATION OF OPERATIONAL FEATURES: Power on reset

PWM Mode (PWM):

CONCLUSION AND FUTURE SCOPE

Many methods evolved for centrally controlled. Either by software or directly by

requirements of the user.

• Mazidi And Mazidi”microcontrollers”

• Ayala “Microcontrolles& its Interfacing”

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