Embedded System & Real Time Programming - Dec 2015

Electronics Engineering (Semester 8)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) What is H/w and S/w co-design.(5 marks) 1 (b) Explain functions of different registers available in ARM 7.(5 marks) 1 (c) Differentiate between Mutex, Lock() and Spinlock() interprocess communication techniques with suitable examples(5 marks) 1 (d) Draw and explain data frame format of CAN bus.(5 marks) 2 (a) Design an automatic tea and coffee vending machine on FSM (Finite State Machine) model for the following requirement: the tea/coffee vending is initiated by user entering a 5 rupee coin. After inserting the coin, the user can select coffee or tea or press cancel to cancel the order and take back the coin.(7 marks) 2 (b) Draw and explain Petrinet model.(3 marks) 2 (c) Name the different problems of using semaphore, also explain the priority inversion problem and its solution.(10 marks) 3 (a) Draw and explain status register structure of MSP 430.(5 marks) 3 (b) Explain different exceptions which occur in MSP430(5 marks) 3 (c) Explain clock circuit and registers used to control it for MSP430.(10 marks) 4 (a) Define process, threads and tasks also explain various states of task.(10 marks) 4 (b) What is shared data problem and mention various methods to resolve it? Give relevant examples.(10 marks) 5 (a) Explain processor modes of ARM7 , also specify different branch instruction used to exchange branch from ARM mode to THUMB mode.(10 marks) 5 (b) Explain addressing modes of ARM7TDMI.(10 marks) 6 (a) Three tasks with ids T1, T2, T3 with estimated time 10,5, 7 ms and priority 1,2,3 respectively enters to ready queue together. A new process with estimated time 2 ms and priority 0, enters the queue after 2 ms. Schedule the tasks using preemptive SJF (Shortest Job First) and priority based scheduling algorithm. Calculate execution time, waiting time, turnaround time, mention which is the best scheduling algorithm for a given problem. (0 is the highest priority)(10 marks) 6 (b) Explain data structures queue, circular queue, Linked list, Array.(10 marks)

Write short notes on any four:-

7 (a) Explain System on Chip (SoC).(5 marks) 7 (b) Spiral model used in EDLC.(5 marks) 7 (c) Periodic and Aperiodic rate monotonic scheduling.(5 marks) 7 (d) Black box and white box testing .(5 marks) 7 (e) SPI and SCI port.(5 marks)