Question

Problem 3: Interrupt and Interrupts Handlers a) Can the phrases Interrupt Service Routine and Interrupt Handler be used interchangeably? b) Laboratory Assignment 2 has two Interrupt Handlers, one for a pin on PortF and one for the System Timer. Please state what each interrupt's function is and what event would cause the interrupt to occur. c) Review Lab 2 and provide pseudo code or a flow diagram for the program,

Answer 1

a)

An interrupt handler or interrupt service routine (ISR) is the function that the kernel runs in response to a specific interrupt:

• Each device that generates interrupts has an associated interrupt handler.
• The interrupt handler for a device is part of the device's driver (the kernel code that manages the device).

b)

portF interrupt will be raised when there is data on the portF, System Timer Interrupt will be raised when

certain number of clock pulses are completed.