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Memory card to pen drive

date transfer made easy

without PC

by

K.Vijayaprabakaran

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INTRODUCTION:

The project aim is developing an intelligent datatransfer system which doesnt require any support

from PC for data transferring.

Transferring of large amount of data to back up

devices became a huge problem. Also, PC is

compulsory for doing it. So, this system is

proposed to eliminate the usage of PC for

transferring the data from memory card to pendrive.

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The main objectives of this project are:

Elimination of PC in data transferring

operation

Formatting option

The main aspects of this project are:

Serial protocol implementation

USB communication

Embedded C Programming

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Block diagram:

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The major building blocks of thisproject are:

Regulated Power Supply Microcontroller(ARM Cortex-M3)

MMC/SD card

Crystal oscillator

Reset

LED Indicators

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The microcontroller used is ARM Cortex-M3.Why Cortex-M3?

Delivers higher performance

Energy Efficiency Full featured

Rich connectivity

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Specifications of ARM LPC-1768:

Use 16/32 Bit ARM7TDMI-S MCU

Has 512KB Flash Memory and 40KB Static RAM internalMCU

Use 12.00MHz Crystal, so MCU can process data with themaximum high speed at 60MHz when using it with Phase-Locked Loop (PLL) internal MCU.

Has RTC Circuit (Real Time Clock) with 32.768 KHzXTAL and Battery Backup.

Has circuit to connect with standard 20 Pin JTAG ARM forReal Time Debugging

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Has standard 2.0 USB as Full Speed inside (USBFunction has 32 End Point).

Has RS232 Communication Circuit by using 2

Channel.

Has SD/MMC card connector circuit by using SSP.

Has EEPROM interface using I2C.

Has PS2 keyboard interface.

All port pins are extracted externally for furtherinterfaces.

7-12V AC/DC Power Supply.

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The controlling device of the whole project is a

Microcontroller. The Microcontroller reads the

data from memory card and makes it into the

suitable format to write it into pen drive. When user presses copy button all the data from

memory card is copied to pen drive as back up

storage.

Also, the system has a provision of formatting

the memory card.

Operation:

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MMC/SD card The Multimedia Card (MMC) is a flash memory card

standard. A memory card or flash memory card issolid-state electronic flash memory data storage

device capable of storing digital contents.

SD cards popularly known as Secure Digital. SDcards is a non-volatile memory card format. SD cardsare based on the older Multimedia card (MMC)

format. Controller writes data into it using SPIprotocol.

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Features of MMC:

Universal low cost data storage and communication media

The MMC communication is based on 7 pin serial bus.

Operate in a low voltage range of 2.0 to 3.6v.

Targeted for portable and stationary applications.

Noted for high data rate of 52Mbps.

Secure versions of card is available.

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RESET BUTTON: Reset is used for putting the Microcontroller into a

known condition. That practically means themicrocontroller can behave rather inaccurately undercertain undesirable conditions. In order to continue itsproper functioning it has to be reset.

A switch placed between the digital input and groundwill short the digital input to ground when it ispressed. This means the voltage seen at the input willbe high when the switch is open and low when switchis closed.

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OSCILLATOR An electronicoscillator is an electronic circuit that

produces a repetitive Electronic signal, often a sine

wave or a square wave. PIC micro controller internally having 4mhz clock

frequency.

We are giving the 20Mhz clock frequency as an

external source for increasing the systemperformance

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Softwares used:Keil vision far in embedded c languageFlash magic programmer softwareExpress SCH for circuit designProteus for hardware implementation

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Applications:This system is portable it finds

very useful for transferring data from

Digital cameras, mobile phones, laptops,MP3players and video game consoles intopen drive.

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Conclusion: The proposed project is capable of transferring data

from a memory card to pen drive without using pc.

Here we can transfer a maximum data of 2 to 10 KBand in order to send more data another RS232

interfacing circuit need to be connected.

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