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[avrdude-dev] [bug #44218] linuxgpio not working with raspberryPi 2. "Ca
From: |
anonymous |
Subject: |
[avrdude-dev] [bug #44218] linuxgpio not working with raspberryPi 2. "Can't open gpioX/direction" : Permission denied. Fixed by little delay |
Date: |
Mon, 09 Feb 2015 23:31:26 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.4.0 |
URL:
<http://savannah.nongnu.org/bugs/?44218>
Summary: linuxgpio not working with raspberryPi 2. "Can't
open gpioX/direction" : Permission denied. Fixed by little delay
Project: AVR Downloader/UploaDEr
Submitted by: None
Submitted on: Mon 09 Feb 2015 11:31:25 PM UTC
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name: Rizlik
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
_______________________________________________________
Details:
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
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Mon 09 Feb 2015 11:31:25 PM UTC Name: gpio_fix.patch Size: 568B By:
None
<http://savannah.nongnu.org/bugs/download.php?file_id=33041>
_______________________________________________________
Reply to this item at:
<http://savannah.nongnu.org/bugs/?44218>
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- [avrdude-dev] [bug #44218] linuxgpio not working with raspberryPi 2. "Can't open gpioX/direction" : Permission denied. Fixed by little delay,
anonymous <=