8051 Microcontroller development board

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• Advance Technologies is a well-established organization & is a leading manufacturer of Electronics Educational Equipments for Engineering.

• It is a company which deals in both education and

agriculture business. In education it deals with all kinds of Embedded, wireless, microcontroller, VLSI and DSP instruments.

• In agriculture it deals in moisture meters, seed counters, Grain Examiners.

• Incepted in the year 2006, Advance Technologies was established with an objective to be recognized as one of India's Leading Manufacturers of Electronics Educational Equipment.

• The Goal of the company is to design and manufacture quality equipments that consistently meet their customer's requirements and needs. Advance Technologies delivers Best Quality at Best Prices.

They are into the business of Manufacturing, Supply & Maintenance of the Electronic Educational Products of the following fields:

•Embedded System.

• VLSI Technology.

• Wireless Technology.

Products of Embedded Technology • 8051 Microcontroller Development Board.

• AVR Microcontroller Development Board .

• PIC Microcontroller Development Board .

• Embedded Universal Development Board .

• ARM Development Board

•FPGA Development Board.

•CPLD Development Board.

•FPGA / CPLD Universal Development Board.

•Spartan 3E Development Board.

Products of VLSI Technology

Products of Wireless Technology•Bluetooth Trainer Kit.

•Color Sensor Development Board.

•Embedded Web Server.

•GPS Trainer Kit.

•GSM Trainer Kit.

•Radio Frequency Application Board.

•RFID Trainer Kit.

•Wi-Fi Development Board.

•Zig-Bee Development Board.

Products for Basic Electronics Lab•CRO

•Function Generator

•Various Transistor Configuration Experiment Kits

•Encoder / Decoder Kit

•MUX / DEMUX Kit

•Counter, Converter Kit

•Logic Gates Kits

•Various Modulation Kits

•Various Oscillator Kits

•Various Multi-Vibrator Kits

•Various Experimental Kits for Various Electronics Labs

• MMEC, Mullana, Ambala• GTBKIET, Malout• MIMIT, Malout• ACERC, Ambala• MIET, Jammu• Jammu University, Jammu• GCET, Jammu• GZSCET, Bhatinda & • Ritika Electronics, Delhi • Many More …

CLIENTS

What Is Microcontroller Development Board ??

Microcontroller Development Board in general sense is defined as a device which is capable to perform many kinds of microcontroller operations ranging from a simple LED glow to a quite complicated applications.

In More specified way, Microcontroller Development Board serves the purpose of explaining the students of technical institutes and colleges various microcontroller practical's.

. Features of Embedded Systems

There are certain key features of embedded systems that differentiate them from other systems in the world. They have been discussed below:

•Software: The software used by embedded systems is called firmware and is stored in Read Only Memory or ROM or a Flash memory chip •User interfaces: There are various types of user interfaces used in embedded systems. Some systems do not have any user interface at all. Devices such as PDAs provide interactive and complete user interfaces. CPU Platform: Embedded systems use various CPU platforms or architectures that include ARM, X86, PowerPC, and PIC etc. •Tools: Embedded system designers use software ranging from compilers and assemblers to debuggers and emulators to develop software for embedded systems. •Start-up: Embedded systems the world over begin with what is called the start-up process. At this point, a self-test is conducted by the system where the hardware, peripherals, power supply etc. are tested for being in good condition.

Applications of embedded systems•Consumer electronics- e.g., cameras, camcorders etc.•Consumer products, e.g., washers, microwave ovens.•Automobiles (anti-lock braking, engine control).•Industrial process controllers & avionics/defense applications•Computer/Communication products, e.g., printers, FAX machines.•Emerging multimedia applications & consumer electronics e.g., cellular phones, personal digital assistants, videoconferencing servers, interactive game boxes, TV set-top boxes.

Automotive electronics

Aircraft electronics

Trains

Telecommunication

CPU

General-Purpose Micro-processor

RAM ROM I/O Port

TimerSerial COM Port

Data Bus

Address Bus

General-Purpose Microprocessor System

CPU for Computers No RAM, ROM, I/O on CPU chip itself Example ： Intel’s x86, Motorola’s 680x0

Many chips on mother’s board

General-purpose microprocessor

RAM ROM

I/O Port

TimerSerial COM Port

Microcontroller

CPU

A smaller computerOn-chip RAM, ROM, I/O ports...Example ： Motorola’s 6811, Intel’s 8051, Zilog’s Z8 and PIC 16X

A single chip

Microcontroller :

Microprocessor vs. Microcontroller

Microprocessor •CPU is stand-alone, RAM, ROM, I/O, timer are separate•designer can decide on the amount of ROM, RAM and I/O ports.•expansive•versatility •general-purpose

Microcontroller• CPU, RAM, ROM, I/O and

timer are all on a single chip

• fix amount of on-chip ROM, RAM, I/O ports

• for applications in which cost, power and space are critical

• single-purpose

1. Meeting the computing needs of the task efficiently and cost effectively

• speed, the amount of ROM and RAM, the number of I/O ports and timers, size, packaging, power consumption

• easy to upgrade• cost per unit

2. availability of software development tools• assemblers, debuggers, C compilers, emulator, simulator,

technical support3. wide availability and reliable sources of the microcontrollers.

For my microcontroller development board , I have chosen P89v51RD2 microcontroller which is an 8-bit microcontroller from the family of 8051 controllers.

Three criteria in Choosing a Microcontroller

Pin Description of the 8051Pin Description of the 8051

1234567891011121314151617181920

4039383736353433323130292827262524232221

P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RST

(RXD)P3.0(TXD)P3.1

(T0)P3.4(T1)P3.5

XTAL2XTAL1

GND

(INT0)P3.2(INT1)P3.3

(RD)P3.7(WR)P3.6

VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)EA/VPPALE/PROGPSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)

8051

Block Diagram

8051

SENSOR

————► ————►

40PINDIP

ADC

LCDDISPLAY

D A C

————► ————►

————► ————►

————► ————►

LEDS

SWITCHES

REAL TIMECLOCK

4×4 MATRIX KEYBOARD

The microcontroller development board is a microcontroller based embedded system through which students can understand different types of interfacings such as LEDs, 7-segment,switches,relays,buzzers, keyboard, ADC, DAC, Sensors, EEPROM, RTC, LCD, 8255 etc. Using this board one can easily understands the hardware and software details of above mentioned devices.

DIFFERENT TYPES OF INTERFACINGS

•LED INTERFACING•SWITCHES INTERFACING•INTERFACING OF 7-SEGMENT DISPLAY

•INTERFACING OF EEPROM

•LCD INTERFACING

•BUZZER INTERFACING•RELAY INTERFACING•RTC INTERFACING

•STEPPER MOTOR INTERFACING

LED INTERFACING

For interfacing a single Led to 89c51 microcontroller, we connect the anode (+) end of LED to the designated port pin via a pull-up resistor. While the cathode end of LED is connected to GND. For glowing a LED, a high logic is required at the anode (+), so port pin is set to high for glowing LED.

● But how do we get the programs onto the devices?

WITH THE USE OF KEIL SOFTWARE

•Write a program in embedded C language.•Execute it.•View the output of program on peripheral devices as provided in Keil software.•Now burn the program on AT89C52 using burner(flash magic).•Now apply the chip with hardware.

29

P0.0

8051

sw

Switch Interfacing

4.7 k

4.7k

In Switch, One end is connected to port pin of 89c51, while other one is grounded.

Keyboard Interfacing

•Keyboards are the input devices and is generally organized in a matrix of rows and columns.•When a key is pressed row makes a contact with column, otherwise there is no connection.•Keyboard is a basic and essential element of an embedded or microcontroller system. For small and hobby projects a 4x4 (hex) matrix keyboard is sufficient. The keys in the matrix keyboard are arranged in a matrix arrangement in order to utilize the port pins of the microcontrollers efficiently. Here we can interface 16 keys by using just 8 pins of microcontroller.

Interfacing of seven segment display

 Seven segment display is a basic type of display which can display numbers from 0 to 9. Driving a 7 segment display is as simple as flashing LEDs, but here we are flashing 7+1 LEDs. The 7 segment display module has 8 LEDs (7 segments to display number and one segment for decimal point or dot) arranged in a particular manner .

INTERFACING OF EEPROM

WR i.e the seven pin is not connected in some parts. The Ic used is at24c02 is

SERIAL CLOCK (SCL):The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device.SERIAL DATA (SDA):The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wire-ORed with any number of other open-drain or open-collector devices.

LCD INTERFACING

•It is an Intelligent Alphanumeric display which can be used to display numbers, characters, and graphics.

•It has 14 pins as shown in pin diagram.

•Display contains 2 internal byte wide registers, one for command (RS=0) and one for display (RS=1).

•There are certain commands to be send to the LCD for making some setting such as clear screen, force the cursor to home position and blink the cursor.

•R/W pin is set to 1 for reading and to 0 for writing.

•EN pin is set to 1 for enabling display.

•DB0-DB7 are pins for 8-bit data bus.

8051

^^^^^^

4×16 Character LCD Display

E RS R/W VeeGnd Vcc

+5v

10k

D0

D7

P1.0

P1.7

P2.0P2.1P2.2

RTC INTERFACINGRTC is widely used device that provides accurate time and date for many applications. Figure shows interfacing of RTC chip DS12887 to 8051.It has a total of 128 bytes of non volatile RAM.It uses 14 bytes of RAM for clock calendar and control registers and other 114 bytes of RAM for general purpose data storage

RST

VCC

SQW\OUT

8051

SDASCL

GND

DS1307

crystal

STEPPER MOTOR INTERFACING

This stepper motor is very simplified. The rotor of a real stepper motor usually has many poles. The animation has only ten poles, however a real stepper motor might have a hundred. These are formed using a single magnet mounted inline with the rotor axis and two pole pieces with many teeth. The teeth are staggered to produce many poles. The stator poles of a real stepper motor also has many teeth. The teeth are arranged so that the two phases are still 90° out of phase. This stepper motor uses permanent magnets. Some stepper motors do not have magnets and instead use the basic principles of a switched reluctance motor. The stator is similar but the rotor is composed of a iron laminates

How To Proceed ?

Initially we interfaced LED, 7-segment and Keyboard and check programme which is the purpose of trainer Kit.In these way we go step by step for each module interface and accomplish the goal of making a well-functioning Trainer Kit.Finally we add some features by interfacing RTC for a Digital clock.

1

Locks & Keys

By this we can’t say that we are

going to provide good security

to our lockers.

2

Security is less

Others can steal the user’s entry key

3

4

Finger Print Module 8

9

S

5

2

Reset

16 X 2 LCD

Driver Circuit

Buzzer

Stepper Motor

Power supply

POWER SUPPLY TO ALL SECTIONS

ULN DRIVER

5

Enter ur fingerprint

verifieing fingerprint

Enter into the locker room

Enter password

Checking

Password

Locker is opened by stepper motor

Press Switch to close the locker

You are unauthorized person

yes

no

no

yes

6

Transformer

Bridge Rectifier

Regulator

7

89S52 microcontroller.

RAM 256Bytes.

8Kb of flash memory.

The functionality of 89S52

is same as 8051

microcontroller.

8

In this we choose “verification” process.

It can operate in 2 modes they are Master

mode and User mode.

9

In this mode,we can register our finger image in present

of manager.

10

Compare of input finger print and identified finger print

11

We are using 16x2 lcd display

LCD has14 pin

12

13

Unique id (password) which is given to user to

open his locker with the help of a keypad

Any port was used to handle our alpha-numeric

keypad.

14

15

Automatically, locker will open by stepper

motor(step angle).

After the work by using reset pin user will

secure their locker.

16

17

It is a signaling device.

It beeps when user mismatch.

18

19

Most secure

No manual errors

Need not carry any

card

Others cannot steel

the user’s entry key

20

Voter Identification and electoral enrollment

Industries

Banks and ATM

Personal Computer

21

GSM modem can be connected to this unit to

communicate to security department, in case of

unauthorized entry trials.

22

This project is used for 100 members, we can also

extend the capability for further requirements.