Interfacing hardware with PC through USB connection

On Tue, 13 Jul 2010 08:59:06 -0700 (PDT)
linnix <me@linnix.info-for.us> wrote:

> On Jul 13, 8:15=C2=A0am, Oscar Almer <o.al...@gmail.com> wrote:
> > On Tue, 13 Jul 2010 10:56:56 -0400
> >
> >
> >
> > Neil <NeilKu...@worldnet.att.net> wrote:
> > > On 7/11/2010 3:24 PM, anex wrote:
> > > > Hi
> >
> > > > I am working on a project that requires me to interface a
> > > > particular hardware with my PC through a USB port and stream
> > > > some audio data through this connection. However i have never
> > > > worked on USB interfacing before and am looking for some good
> > > > resources or tutorials to start work in this field. I might
> > > > also need to use a microcontroller in the interfacing
> > > > circuitry. I cant buy expensive ready made interfacing tools
> > > > available in the market and would want build them on my own. It
> > > > would be great if you guys could suggest something related to
> > > > such a project that might be of help..
> >
> > > > Thanks in advance.! =C2=A0
> >
> > > > --------------------------------------- =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0
> > > > Posted throughhttp://www.EmbeddedRelated.com
> >
> > > Jan Axelsons Book USB Complete is Popular.
> >
> > I went looking for books on this very topic last week, found the
> > same, and bought it. I feel like I'm missing something, however; it
> > seems to discuss the high-level protocols well enough, but so far
> > I've found it somewhat repetitive and =C2=A0importantly lacking in
> > low-level details. (Low-level details is what makes the high-level
> > picture, after all).
>=20
> How does your application interface look like?  Do you have custom
> driver/apps on the target?  If so, you can just overlay your protocols
> on top of the existing standards.  I always start with the CDC driver
> because it provides a quick and easy debugging environment (just
> printf).  Even if I need another driver class, I would end up with
> composite device with at least the CDC debug port.
>=20

I'm not the OP, which may be who you want to ask. Topic drift setting
in again.=20
My main complaint about the book is that, as someone else pointed out
in a different branch, it covers the basics but not the details. I
would not be able to implement a USB device from just reading the book.


//Oscar