What Is Edge Triggered Interrupt and Level Triggered Interrupt?

Triggered This mean making a circuit active,making a circuit active means allowing the circuit to take input and give output,Like for example supposed we have a flip-flop when the circuit is not triggered ,even if you give some input data, it will not change the data stored inside the flip-flop nor will it change the output .They are basically two types of Triggering interrupt . The triggering is given in form of a clock pulse or gating signal depending upon the type of triggering mechanism used the circuit will become active at specific states...

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What Is Interrupt Sevice Routine or Interrupt Handler Interrupt?

An interrupt service routine (ISR) or interrupt handle is a piece of code that code that should be executed when an interrupt is triggered. usually each enabled interrupt has it own ISR. in AVR assemble language each ISR must end with the RETI instruction which indicates the end of the ISR.Interrupt can be categorized into Mask-able interrupt,non-mask-able interrupt,inter-processor interrupt(IPI),software interrupt, and superiors interrupt.1.Maskable interrupt is a hardware interrupt that may be ignored by setting a bit in an interrupt mask register's...

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what Is Interrupt?

Interrupts are basically event that require immediate attention by the micro-controller.When an interrupt event occurs the CPU pause its current task and attend the interrupt by executing an interrupt serve routine(ISR) at the end of the ISR. the CPU return to the task it had pause and continue its normal operation.In order for the micro-controller to respond to an interrupt event the interrupt feature of the micron-controller must be enabled along with the specific event. This is done by setting the global interrupt enable bit & interrupt...

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what Is Meaning of the Declaration Const Volatile Int a=6

value of variable cannot be changed by programmer (due to const) but it value can be changed by external device or hardware interrupt (due to volatile).Example:#include<stdio.h>const volatile int a=6;// HERE variable int a is constant so that it can't change by the programmer but it                                                     ...

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What Is Verification and Validation?

In software project management ,software testing ,and software engines verification and validation is the process of checking that a software systems meets specification and that it fulfill its intended purpo...

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What Is Unit and White Box Testing

What is unit testing?In unit testing is a method by which individuals units of source codes are tested to determine if they are for  use or not.What is white-box-testing?white-box testing is a method of testing software that tests internal structures or working of an application as opposed to its functionality.In white box testing an internal perspective of the system as well as programming skills are used to design test ca...

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What Is integration Testing?

Integration testing (sometimes called integration and testing) is the phase in software testing in which individual software modules are combined and tested as a group. It Occurs after a unit testing and before validation testing.The purpose of integration testing is to verify functional performance and reliability required placed on major design item(groups of unit...

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What is Reset Vector ?

Reset vector is a computing term used to describe the default location a center processing unit will go to find the first instruction it will execute after a reset . That is to say  the reset vector is a pointer or address where the CPU should always begin as soon as it is able to execute instructi...

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What Is #Progma Directive?

Progma is implementation specific directive that is each progma directive has different implementation rule and use. There are the many type of progma directive and varies from one compiler to another compiler. If compiler doesn't recognize particular progma. Than it ignore the progma statement without showing any error or warning message and execute. /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in...

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Far Pointer in C Programming

The Pointer which can point or access whole the residence memory of RAM i.e. which can access all 16 segments is known as far Pointer.Far Pointer:-(If you don’t know what is segment the click here)Size of far Pointer is 4 byte or 32 bit.Examples:(1) What will be output of following c program? /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt;...

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What Is Huge Pointer

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} table.MsoTableGrid3 {mso-style-name:"Table...

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What Is Pointer?

A Pointer is a derive data type in C, which is built from the fundamental data type in c a Pointer is a variable which stores always an address of another variable. Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan;...

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What Is Wild Pointer

  Wild pointer:           A pointer in C which has not been initialized is known as wild pointer.    Example:   What will be output of following c program? /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt;...

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What Is Null Pointer in C Language?

It is always a good practice to assign a NULL value to a Pointer variable in case you do not have an exact address to be assigned. This is done at the time of variable declaration. A Pointer that is assigned NULL is called a null Pointer. The NULL Pointer is a constant at a value of zero defined in several standard libraries.Consider the following program: Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0;...

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