Hall Ticket No Question Paper Code: BES001
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
M.Tech I Semester End Examinations (Regular) February, 2018
Regulation: IARE-R16
EMBEDDED C
(Common to Computer Science and Engineering|Embedded Systems)
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define an embedded system? Why C language is preferred for embedded systems?
Elaborate the process of a central heating controller and develop an embedded C program for it?

2. List out the features of 8051 microcontroller? Draw the pin diagram of 8051 microcontroller and
explain each pin in detail.
Design possible reset circuits for 8051 microcontroller? Discuss about clock frequency in 8051
microcontroller.
UNIT II
3. Discuss in detail the basic techniques for reading from port pins? Develop an embedded C
program for reading and writing bits (generic version).
What is debounce technique? Explain the concept of switch bounce with example and develop
an embedded C program for reading switch inputs?
4. List out bitwise operators of Develop an embedded C program in order to perform bitwise
operations on specified data?
Discuss in detail the difference between the schematic representation of a switch connected to a
port with and without internal pull-up resistors?
UNIT III
5. How to use an object-oriented programming with C programs? Explain it with example.
Discuss various components available in project header file and mention their applications? Develop
an embedded C program for the project header (main.h)?
6. Elaborate the process of goat-counting using switching concept? Develop an embedded C program
for restructuring the gate counting?
Describe port header with a schematic representation? Develop an embedded C program for the
port header (port.h)?
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UNIT IV
7. Construct the block diagram of simple autopilot system? Discuss each block in detail? Write a
program for identifying problems with simple switch interface?
Draw the special function registers TMOD and TCON? Explain each bit in detail? Identify the
potential problem using switch interface code?
8. Elaborate the process of creating a portable hardware delay and Mention its applications? Generate
a 50ms hardware delay for 12MHz using 8051 microcontroller.
Illustrate the process of creating loop timeouts with example? Develop an embedded C program
for creating loop timeouts?
UNIT V
9. Discuss the working principle of main control panel for an alarm system with a block diagram?
Mention different operating states of control panel for alarm system?
Discuss about keypad block in an intruder alarm system? Develop an embedded C program for
an intruder alarm system using 8051 microcontroller?
10. Discuss the key features of embedded C while designing an intruder alarm system using a small
art gallery?
List out the key software components used in intruder alarm system? Mention its applications
in an intruder alarm system?
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