RE: [linux-audio-dev] open-source like hardware

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Subject: RE: [linux-audio-dev] open-source like hardware
From: Pieter (pieter.palmers_AT_student.kuleuven.ac.be)
Date: Mon Jan 14 2002 - 11:37:56 EET

>
> For the bandwith of SPI I would have to take one of my Mororola books
> out of the shelf (but I have to learn for exams, currently :-(), but
> I=B2C would be far too slow. (Or did you really mean I=B2S (which I have
> not heared, yet ...).
>

i did really mean I²S, it's the inter-ic-sound bus (like I²C but faster)
from
phillips. the phillips counterpart of SPI.

> But with firewire we only need one box. An Firewire Interface
> (stand-alone, or intergraded into an DSP [is there one?]) and then
> connecting the AD and DA onverters somwhere on its busses. When we use
> some of the high-quality Crystal ones, there is not much
> anlog-component work to do to get really perfect sound - they do this
> alone ;-) (ok - they cost a bit ;-)
>

I don't think there are firewire interfaces integrated on a DSP. But I know
TI makes interfacing chips that are pretty easy to use. It's even possible
to generate a structure like this:

-------------------------------- --------------------
| (PC) PCI -> FireWire adaptor +>---- Firewire ------->+ Interface -> PCI |
-------------------------------- --------------------

i.e. using a firewire link to extend the PCI bus. I also read somewhere that
it's possible to make the link completely transparent, i.e. the periphial is
inserted into the PC's memory space... if such thing is possible,
programming
would be a lot easier: design the HW the right way & you can forget about
the
firewire.
I have to research that further, and I have exams too (in exactly one week)
so
time is limited.

CU
Pieter

----------------------------------------------------------------------
pieter.palmers_AT_esat.kuleuven.ac.be
Currently getting my
Masters in Science and Engineering, (micro-electronics)
@ ESAT laboratory, KULeuven, Belgium.
----------------------------------------------------------------------

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