Re: [avr-chat] AVRDUDE : fails to open // pport ?!

[Rolf Magnus]

On Wednesday 31 August 2005 09:42, Vincent Trouilliez wrote:

> But avrdude won't start, it's having problem using hte parallel port it
> seems, this is error I get :
>
> "avrdude: can't claim device "/dev/parport0": Invalid argument"
>
> On my system the parport device is /dev/lp0, so I made a symlink
>  ("sudo ln -s /dev/lp0 /dev/parport0"), but still no joy.

/dev/lp0 is _not_ the parport device. It's the printer device. (lp = line 
printer). You need to have the ppdev kernel module loaded. Look with lsmod of 
it is loaded. If not, try loading it (as root) with 'modprobe ppdev'.

> I ran avrdude as root, but again no joy.
> I looked in the manual where it says that on Linux platforms, avrdude
> uses the "ppdev interface" to access the parport.
> So I guess my linux distro doesn't have this installed by default, so I
> need to add it.
> But how to do that ? What is this "interface",

It's the parport device in /dev.