Interrupt

Interrupt routine

Interrupt routine
  1. What is meant by interrupt service routine?
  2. What is interrupt service routine with example?
  3. What are the types of interrupt service routine?
  4. How do I write an ISR routine?

What is meant by interrupt service routine?

An interrupt service routine (ISR) is a software routine that hardware invokes in response to an interrupt. ISR examines an interrupt and determines how to handle it executes the handling, and then returns a logical interrupt value. If no further handling is required the ISR notifies the kernel with a return value.

What is interrupt service routine with example?

A basic example of an ISR is a routine that handles keyboard events, such as pressing or releasing a key. Each time a key is pressed, the the ISR processes the input. ... Examples include keyboards, mice, sound cards, and hard drives. A device driver enables communication between each of these devices and the CPU.

What are the types of interrupt service routine?

Types of Interrupt

How do I write an ISR routine?

Let's see how to properly write ISR handlers!

  1. 1 Hold The Interrupt Logic Diagram.
  2. 2 Enable The Interrupts You Need.
  3. 3 Write The ISR Handler Definition.
  4. 4 Check The Flags.
  5. 5 Write The Handler Itself.
  6. 6 Keep It Elegant, Simple & Quick!
  7. 7 Leave A Couple Of IO-Pins Free.
  8. 8 Share this:

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