LinuxQuestions.org
Review your favorite Linux distribution.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 06-10-2014, 04:26 PM   #1
david_8274
Member
 
Registered: Jun 2013
Location: California
Distribution: Ubuntu, Fedora
Posts: 75

Rep: Reputation: Disabled
interrupt in userspace code


Hi,

Is it true that user space program is not able to receive hardware interrupt(such as GPIO input interrupt)? I know how to set up GPIO interrupt and ISR in kernel space, and i am trying to do the similar thing in user space.

Thanks,
Wei Xu
 
Old 06-10-2014, 05:54 PM   #2
smallpond
Senior Member
 
Registered: Feb 2011
Location: Massachusetts, USA
Distribution: CentOS 6 (pre-systemd)
Posts: 2,761

Rep: Reputation: 744Reputation: 744Reputation: 744Reputation: 744Reputation: 744Reputation: 744Reputation: 744
Basically true. Take an interrupt routine for example. Two different processes in user space may use the same addresses, since all user processes run in their own address space. So what address would it call?
 
Old 06-10-2014, 06:36 PM   #3
david_8274
Member
 
Registered: Jun 2013
Location: California
Distribution: Ubuntu, Fedora
Posts: 75

Original Poster
Rep: Reputation: Disabled
@smallpond
Thank you for your reply. However, could you provide more details about the point you made "Two different processes in user space may use the same addresses, since all user processes run in their own address space. So what address would it call?"?
I am a newbie and easy to get confused by something appear to be obvious.

Thanks,
Wei Xu
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
Parallel Port Interrupt problem with C code? James Scrymgeour Linux - Kernel 15 11-17-2010 03:26 PM
control is not going to interrupt handler when interrupt remyasj LinuxQuestions.org Member Intro 1 11-12-2009 12:56 AM
How to retrieve CPU, Disk and Memory utilization in linux userspace code NilesBor Linux - Kernel 2 06-17-2009 08:27 AM
control is not going to interrupt handler when interrupt comes in serial driver sateeshalla Linux - Kernel 1 05-04-2006 09:43 AM
code 0f 0b e2 03 0f d7 25 c0 ... In interrupt handler not syncing error bantay Red Hat 1 06-24-2004 04:14 PM


All times are GMT -5. The time now is 04:10 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration