Jawaharlal Nehru Technological University Hyderabad 2010-5th Sem M.C.A Iester Regular s EMBEDDED SYSTEMS - Question Paper

code No: 44
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
M.C.A IV Semester Regular exams July 2010
EMBEDDED SYSTEMS
Time: 3hours Max.Marks:60
ans any 5 ques.
All ques. carry equal marks
- - -
1.a) elaborate the steps involved in the design of embedded system? discuss them
briefly.
b) provide the steps involved in an embedded system design for a design example.
2. discuss the various modes of Serial data communication available with 8051.
3.a) Briefly discuss the conditional and unconditional branch instructions in 8051
instruction set with an example for every.
b) Write and assemble language program for 8051 to rotate the contents of Register
R1R0 in register bank three towards right for four times treating them together as 16 bit
register.
4.a) Write an assembly language program for 8051 to call a subroutine using ACALL
instruction to perform "Square" operation to calculate f = x2 + y2 + z2.
b) discuss how the interrupt handling is done in 8051.
5. Interface a matrix keyboard to 8051 through port2 and seven segment display to port1.
Write an assembly language program to learn the key clousure and display the key
number on display unit.
6.a) What is Semaphore and what is Mutex? Where are they used? discuss with an
example.
b) elaborate Shared memories and how are they used by tasks to ensure that there is
no coherency problem?
7.a) Which Inter task communication objects help in synchronization and data
transfer?
b) discuss the functions in uCOS.
8.a) elaborate the bus characteristics of ARM and SHARC processors?
b) define the CAN protocol as a layered protocol.
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R06

Earning:   Approval pending.