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[ Winter 2014 ] ASSIGNMENT
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PROGRAM
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Master of Science in Information
Technology(MSc IT)Revised Fall 2011
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SEMESTER
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3
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SUBJECT CODE & NAME
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MIT3042– Embedded Systems
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CREDIT
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4
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BK ID
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B1551
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MARKS
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60
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Answer all Questions
b) What are the characteristics of Embedded
Systems?
Answer: a) Embedded System:An embedded system is a computer system with
a dedicated function within a larger mechanical or electrical system, often
with real-time computing constraints. It is embedded as part of a complete
device often including hardware and mechanical parts. Embedded systems control
many devices
b)Characteristics of Embedded Systems:
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. Embedded systems are not always
standalone devices. Many
Q. 2. What is a microcontroller? List the
salient features of 8051 microcontroller.
Answer:A microcontroller (sometimes abbreviated µC, uC or MCU) is a small
computer on a single integrated circuit containing a processor core, memory,
and programmable input/output peripherals. Program memory in the form of
Ferroelectric RAM, NOR flash or OTP ROM is also often included on chip, as well
as a typically small amount of RAM. Microcontrollers are designed for embedded
applications, in contrast to the microprocessors used in personal computers or
other general purpose applications.
Q. 3. Explain the following directives in
8051.
(i) DB directive:The DB directive is the most widely used data
directive in the assembler. It is used to define the 8-bit data. When DB is
used to define data, the numbers can be in decimal, binary, hex, or ASCII
formats. For decimal, the “D” after the decimal number is optional, but using
“B” (binary) and “H” (hexadecimal) for the others is required. Regardless of
which is used, the assembler will convert the numbers into hex. To indicate
ASCII, simply place the characters in quotation marks (‘like this’). The
assembler will assign the ASCII
Q. 4. List and explain RTOS kernel
components.
Answer:A real-time operating system (RTOS) is an operating system (OS) intended
to serve real-time application process data as it comes in, typically without
buffering delays. Processing time requirements (including any OS delay) are
measured in tenths of seconds or shorter.A key characteristic of an RTOS is the
level of its consistency concerning the amount of time it takes to accept and
complete an application's task; the variability is jitter. A hard real-time
operating system has less jitter than a soft real-time operating system.
Q. 5. What are the functions that interrupt
and event handling mechanism of an RTOS provide?
Answer:Since an interrupt handler blocks the highest priority task from running,
and since real time operating systems are designed to keep thread latency to a
minimum, interrupt handlers are typically kept as short as possible. The
interrupt handler defers all interaction with the hardware if possible;
typically all that is necessary is to acknowledge or disable the interrupt (so
that it won't occur again when the interrupt handler returns) and notify a task
that work needs to be done. This can be done by unblocking a driver task
through releasing a semaphore, setting a flag or sending a message. A scheduler
often provides the ability
Q. 6. Write note on I²C Bus.
Answer:The I2C bus was designed by Philips in the early '80s to allow easy
communication between components which reside on the same circuit board.
Philips Semiconductors migrated to NXP in 2006.
The name I2C translates into "Inter
IC". Sometimes the bus is called IIC or I²C bus.
The original communication
Dear
students get fully solved assignments
Send
your semester & Specialization name to our mail id :
help.mbaassignments@gmail.com
or
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us at : 08263069601
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