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• Introduction • Company Profile• Embedded System

o Definitiono Advantageso Applications

• Programmable Data Terminal (PDT)o Definitiono Applications of PDT

• Point of Sale (PoS)• Technical Requirements for PoS

o Handheld Devices o PC with Serial Interfaceo Keil Softwares

• Working of PoS


REIL: Rajasthan Electronics and Instrumentation Ltd.Chairman: B.S SahneyTechnical Executive: Abhilasha Maheshwari

Products are:• Agro Dairy Products ( Milk tester)• SPV Products ( Street lighting & water pumping

system)• IT Products ( Internet tech. applications)• Industrial Electronics Products ( Single & three phase

energy motors)


“An embedded system is a computer system designed to perform one or a few dedicated often with real-time computing constraints.”

“It is embedded as part of a complete device often including hardware and software parts.”

SoftwareHardware Interface


• Designed to do a specific task. • Simplified system hardware. • Less costly.• In the form of small computerized parts in larger

devices. • Required limited computer hardware resources.• Little memory and small keyboard or screen.


• MP3 players • Mobile phones • GPS receivers • Printers• Programmable data terminal


“The Programmable Data Terminal (PDT) is a Hand Held Computer”. It consists of components like Program flash memory, Data flash memory, customized Keypad, Display unit with Backlight, Impact or Thermal printer, Rechargeable battery, High speed RS232 / IR port for programming and data transfer etc.


• Electronic Ticketing Machine

• Spot Billing Machine• Electronic Parking Machine• Micro Banking • House tax terminal. • Traffic Offence recording

system• Point of Sale terminal etc.


• Point of sale or point of service (POS or PoS) is used the location - where a sale transaction takes place.

• More specifically, point of sale often refers to -- the equivalent of an electronic cash register.


• Handheld Device• PC With Serial Interface• Keil Complier


“Handheld device is a pocket-sized computing device, typically comprising a small visual display screen for user output with a thermal printer and a miniature keyboard or touch screen for user input”.


The POS Terminal consists of wide range of optional Hardware components like: • Customised Key Pad (30 keys Elestomeric)• Display (5 lines x 20 characters) unit with Backlight• 256KB program flash memory• 4MB Data flash Memory• Built in 2.2 AHr NiMH battery• Intelligent Battery Charger• High speed serial port• Programming port• High speed Thermal printer • Data Modem (optional)• Smart Card Reader (optional)


“The interfacing between computer and hand held device is done by a data cable.”


A different type of compiler is used for compiling in programmable data terminal.This software follow the steps below:1. Create a project to select the 8051 Device and the

tool settings.2. Create source files in C or Assembly.3. Build your application with the Project manager.4. Correct errors in source files.5. Test linked application



Data Flow Diagram

POS Terminal

PAYMENT MODE

DELETION OF ITEMS ADDITION OF ITEMS

Billing

Cash delivered

submit

Add itemRemoved item

Removing item


• INSTANT GENERATION OF SALES BILL • THE STOCK IS REDUCED FOR THE ITEMS SOLD.• THE STOCK CAN BE UPDATED ON RECEIPT OF ITEMS.• CHECKS AND BALANCES LIKE SALE FOR ITEMS NOT IN STOCK

CAN NOT BE MADE.• FACILITY OF INSTANTLY KNOWING STOCK OF ALL OR

INDIVIDUAL ITEMS• DATA TRANSFER FACILITY BETWEEN PDT AND PARENT PC.• THE SALE TRENDS AND SALE HISTORY REMAINS AVAILABLE

AT HOST PC WITH A VARIETY OF REPORTS


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