[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] What is a ppio_ppdev?

From: Daniel O'Connor
Subject: Re: [Discuss-gnuradio] What is a ppio_ppdev?
Date: Sun, 20 Feb 2005 12:12:56 +1030
User-agent: KMail/1.7.92

On Sun, 20 Feb 2005 11:54, Berndt Josef Wulf wrote:
> According to the ppbus(4) documentation,there appears to be support for
> such device - ppi(4) - see below:
>            o  a user interface named ppi(4) that allows parallel port
> access from outside the kernel without conflicting with kernel-in drivers.
> However, I failed to source the man page for ppi(4). I've posted an email
> to the relevant NetBSD mailing list for more info about this interface.

It sounds like the one in FreeBSD..

It's a bus which allows you to connect different drivers to the parallel port 
without them conflicting - eg lpt and ppi (which is a "geek port").

The ppi interface is pretty simple - open /dev/ppiX and do ioctl's on it to 
frob bits - the Atmel AVR programming tool avrdude uses it if you want to see 
some example code.

Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C

Attachment: pgp0io9SXZ1Ee.pgp
Description: PGP signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]