bugAVR Downloader/UploaDEr - Bugs: bug #44218, linuxgpio not working with...

 
 

You are not allowed to post comments on this tracker with your current authentication level.

bug #44218: linuxgpio not working with raspberryPi 2. "Can't open gpioX/direction" : Permission denied. Fixed by little delay

Submitted by:  None
Submitted on:  Mon 09 Feb 2015 11:31:25 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Priority: 5 - NormalItem Group: None
Status: NonePrivacy: Public
Assigned to: NoneOriginator Name: Rizlik
Originator Email: -unavailable-Open/Closed: Open
Release: NoneProgrammer hardware: 
Device type: 

Mon 09 Feb 2015 11:31:25 PM UTC, original submission:

Hi,

When trying to use avrdude with my raspberryPi2 using linuxgpio programmer I got:

"Can't open gpioX/direction" : Permission denied

When stepping the code in gdb the problem is not reproduced, so I thought that the problem is that avrdude try to change direction too fast after he exported the gpio pin.

Indeed adding a little delay before trying to switch direction fixes the problem. I attach a little patch that solve the problem for me.

Same problem is shown by

$ echo 2 > /sys/class/gpio/export; echo in > /sys/class/gpio2/direction

So isn't a problem of avrdude.

Hope it helps,
rizlik

Anonymous

 

Attached Files
file #33041:  gpio_fix.patch added by None (568B - text/x-patch)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by None (Submitted the item)
  •  

    Do you think this task is very important?
    If so, you can click here to add your encouragement to it.
    This task has 0 encouragements so far.

    Only logged-in users can vote.

     

    Please enter the title of George Orwell's famous dystopian book (it's a date):

     

     

    Follows 1 latest change.

    Date Changed By Updated Field Previous Value => Replaced By
    Mon 09 Feb 2015 11:31:25 PM UTCNoneAttached File-=>Added gpio_fix.patch, #33041

    Back to the top


    Powered by Savane 3.1-cleanup1