Solved

What is fixed interrupt vector table ?

Posted on 2014-11-10
2
248 Views
Last Modified: 2014-11-10
Processor manual says the following:

"The fixed interrupt vector table is allocated to the addresses from 0xFFFDC to 0xFFFFF.  Therefore, store the start address of each interrupt routine here."
The above address range is portion of internal ROM inside the microcontroller.


Why do they say "fixed".  Can the vector table float ?
0
Comment
Question by:naseeam
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 86

Assisted Solution

by:jkr
jkr earned 150 total points
ID: 40433221
For some architechtures, the interrupt vector table is indeed relocatable (see e.g. http://www.keil.com/forum/10151/stm32-cortex-m3/ about 'NVIC_SetVectorTable()' and apologies for not finding a better example), so I assume that in your case this does not apply.
0
 
LVL 34

Accepted Solution

by:
sarabande earned 350 total points
ID: 40433243
an interrupt vector table is a table of interrupt vectors. an interrupt vector associates an interrupt handler with an interrupt request.

Why do they say "fixed"
they say 'fixed' because the table has a fixed size and is located at a fixed memory address.

Can the vector table float ?
not sure that I understand the question. if we assume the size of an interrupt vector is 32 bit or 4 byte, the space from 0xFFFDC to 0xFFFFF (== 36 bytes) would allow to handle 9 interrupts.

Sara
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An Outlet in Cocoa is a persistent reference to a GUI control; it connects a property (a variable) to a control.  For example, it is common to create an Outlet for the text field GUI control and change the text that appears in this field via that Ou…
This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. A brief on problem: Lets take example problem for simplicity: - I have a G…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use while-loops in the C programming language.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question