[cpia] Help with parallel port driver in ECP mode

[Selma Kwong]

For the interface between the microcontroller to the webcam, do I need to
put some controller chip or buffer in between?  I read in Jan Axelson's
book (Parallel Port Complete) that I should put a 82C55 Programmable
Peripheral Interface between.  And I read somewhere people use a buffer
such as the Fairchild 74ACT1284 in between.  Does anyone know about these?

Selma

Peter Pregler wrote:

> On Sun, Sep 30, 2001 at 12:33:51AM +1000, Selma Kwong wrote:
> > * Vision PPC2 sample source - pp_test1.zip
>
> This is sample driver-code for dos/windows.
>
> > * Parallel port driver source code by STM - ppc2.zip
>
> IIRC this is the Windows driver source.
>
> > * In download: cpia-1.2.tgz,
>
> This is the latest release of the linux driver.
>
> > cpia-control-0.3.3.tgz, cpia-control_0.3.3-1_i386.deb
>
> This is a python-gtk application to write strings to the
> /proc-filesystem to control the camera.
>
> > Which one should I use to start off with? I am planning to save
> > program space by only implementing the ECP mode without buffering (no
> > FIFO - asynchronous?).
>
> Best start with the pp_test.zip and get the chip-description to
> implement a minimal driver. Especially the windows- and the
> linux-driver do much more and have additional levels of abstractions
> that you might not need for your microcontroller.
>
> -Peter
>
> --
> Feeling amorous, she looked under the sheets and cried, "Oh, no,
> it's Microsoft!"
> -------------------------------
> Email: Peter_Pregler@email.com