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Old 07-09-2012, 02:40 AM   #1
arundhyoti
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Registered: Jan 2011
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failed to open parellel port


Hi all

I am really new to Linux. I am trying to run a code on Atmega8 via parallel port.
everytime i execute make flash, gives an error

avrdude: can't open device "/dev/parport0": Permission denied
avrdude: failed to open parallel port "/dev/parport0"

So seems like need to install few files. how? and what? Please help!!!
 
Old 07-09-2012, 03:03 AM   #2
zhjim
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You get an 'Permisson denied' error. So it seems that the user you are running avrdude as does not have the permission to access /dev/parport0.
Please provide the output of ls -lh /dev/par* or try running the command as the root user.

To be more of help it would be good if you provide the name of the distribution you have in use.
 
Old 07-09-2012, 03:45 AM   #3
arundhyoti
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Smile

Well I am using Ubuntu 12.04

I was doing my search meanwhile. Have resolved the problem for now.

mknod /dev/parport0 c 99 0

and had to change permission from root using

chmod a+rw /dev/parport0

which i could not since i dont have access to root.

So went to the directory containing my .c file typed following commands.

make
sudo make flash

This worked!
So I am thinking when i made the device node, access permission was granted by default since i am the only user.

thanks for you reply

Cheers
 
Old 07-09-2012, 03:55 AM   #4
zhjim
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Great you go it sorted.
 
  


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