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Assignment No. 02 (GRADED) Semester: Fall 2013 CS609: System Programming-Due Date: 9/12/2013

Assignment No. 02
Semester: Fall 2013
System Programming-CS609

 

Total Marks: 20

 

Due Date: 09/Dec/2013

Graded Assignment

Instructions:                          

Please read the following instructions carefully before submitting assignment:

 

  • You will submit your assignment before or on due date on VU-LMS.
  • Assignment should be completed by your own efforts it should not be copied from internet, handouts or books.
  • You should submit your .doc File via assignment interface at VU-LMS.
  • Assignment sent via Email will not be replied and accepted in any case.
  • If the submitted assignment does not open or file is corrupt, it will not be marked.
  • You will submit solution only in document (.doc or .docx) File.

 

Objectives:

 

To understand the use of ISR and its services.

 

 

For any query about the assignment, contact at cs609@vu.edu.pk

Assignment Questions

 

Question 1:                                                                                                                               Marks 10     

Question 1:

Serial port contains a special chip for input/output which can communicate in two different modes. Explore and describe these modes and which one is better in the serial communication.

Note: Solutions containing the image of any text will reward zero marks.

Question 2:                                                                                                                               Marks 04     

Data is written at UART internal Transmitter Holding Register. What do you think is the role of Transmit Shift Register and TxD line during this write operation?

 

Question 3:                                                                                                                               Marks 06     

DTE wants to communicate with the DCE using RS232C Protocol. How does this communication start and end?  Identify the steps involved from the starting signal to ending signal between DTE and DCE device.

 

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Question no.2: (page112)


Transmit Shift Register is used for parallel to serial communication.
Data that comes from transmitter holding register parallel transmitted in Transmit Shift register and that register output it serially through TxD line. TxD is used to take transmitted data from Transmit Shift Register and use it in communication.

Question no.1:

UARTs (Universal Asynchronous Receiver Transmitter) are serial chips on your PC motherboard (or on an internal modem card)
There are two basic types of UARTs: dumb UARTS and FIFO UARTS

DTE and DCE 
DTE stands for Data Terminal Equipment. A computer is a DTE. DCE stands for Data Communication Equipment. A modem is a DCE.
DTE normally comes with a Male Connector, while DCE comes with a Female Connector. However, that is not always true. Use the simple way below to confirm: Measure Pin 3 and Pin 5 of a DB-9 Connector with a Volt Meter, if you get a voltage of -3V to -15V, then it is a DTE device. If the voltage is on Pin 2, then it is a DCE device.
Connection:
A straight-through cable is used to connect a DTE (e.g. computer) to a DCE (e.g. modem), all signals in one side connected to the corresponding signals in the other side in a one-to-one basis. A crossover (null-modem) cable is used to connect two DTE directly, without a modem in between. They cross transmit and receive data signals between the two sides and there are many variations on how the other control signals are wired, below is one of them:

plz complete soilution upload kar dan

sir,
Serial port contains a special chip for input/output which can communicate in two different modes. Explore and describe these modes and which one is better in the serial communication.
my question is about the question#1 of assignment #2 ..kindly guide me about the given statement are we write about the serial communication modes which are asynchronous and synchronous ???or we have write about special chip which is  UART chip and it modes
 
regards!
Post Your Comments
Other Students' Comments: 0

Instructor's Reply:
Read the question carefully. You have been asked about the modes of special chip not the modes of serial communication. Think on it, and find the answer. (very easy if you know about that chip)

its mean Dumb UARTs  and FIFO UARTs are the right answers...

these are the types i think, not modes! 

what are the two modes of that special chip i.e. if UART?? what's about the other mode if one is say asynchronous mode?

If that particular chip is UART (not confirmed yet) then FIFO & DUMP are its types i think whereas sir asked for the modes of that chip. 

I came to know through google that there is a mode of UART called "DMA Mode". i.e. Direct Memory Access mode. Don't know about the other mode.

There are two other modes as well which i found in this regard i.e. "Mode 0" & "Mode 1"

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