Searching \ for '[OT]ish Specs for USB' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=ish+specs+usb
Search entire site for: 'ish Specs for USB'.

Exact match. Not showing close matches.
PICList Thread
'[OT]ish Specs for USB'
1998\12\12@030915 by Quentin

flavicon
face
Hi
Where can I find the specs for USB?
Maybe I can  start using it instead of normal serial to comunicate with
PIC's.
Anybody tried it yet?

Thanks
Quentin

1998\12\12@071402 by marbel

picon face
HI i am busy with the cypress controller the have a free cd avaleble
with theyr products
and the full spec's of USB

Marcel
spam_OUTmarbelTakeThisOuTspamxs4all.nl
Amsterdam

Quentin wrote:
>
> Hi
> Where can I find the specs for USB?
> Maybe I can  start using it instead of normal serial to comunicate with
> PIC's.
> Anybody tried it yet?
>
> Thanks
> Quentin

1998\12\12@083614 by paulb

flavicon
face
Quentin wrote:

> Where can I find the specs for USB?
> Maybe I can  start using it instead of normal serial to communicate
> with PIC's.  Anybody tried it yet?

 Consider.  You need a USB interface chip which will cost at least
double the price of the PIC for starters, then you have to interface
*it* to the PIC.  Serial?  Parallel?

 I don't think it's a "goer".
--
 Cheers,
       Paul B.

1998\12\12@104504 by Quentin

flavicon
face
You talking interface like the 232 stuff (MAX232 etc.), which condition
the signal?
Or is is for encoding, which I suppose the PIC can do?
OTHA, I am sure USB prices will drop as it gets more popular.

Quentin

Paul B. Webster VK2BZC wrote:

>   Consider.  You need a USB interface chip which will cost at least
> double the price of the PIC for starters, then you have to interface
> *it* to the PIC.  Serial?  Parallel?
>
>   I don't think it's a "goer".
> --
>   Cheers,
>         Paul B.

1998\12\12@112735 by Dave Johnson

flavicon
face
>Consider.  You need a USB interface chip which will cost at least
> double the price of the PIC for starters
There are USB controllers available for about a dollar, US. So not bad at
all.

Dave Johnson

1998\12\12@114235 by Harold M Hallikainen

picon face
On Sun, 13 Dec 1998 00:30:35 +1000 "Paul B. Webster VK2BZC"
<.....paulbKILLspamspam@spam@midcoast.com.au> writes:
>
>  Consider.  You need a USB interface chip which will cost at least
>double the price of the PIC for starters, then you have to interface
>*it* to the PIC.  Serial?  Parallel?
>
>  I don't think it's a "goer".
>--
>

       However, Microsoft wants to get rid of all ports but USB, so are we
gonna be forced to go there?  How about Microchip adding USB to the PIC?


Harold

___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]

1998\12\12@131708 by Richard A. Smith

flavicon
face
On Sat, 12 Dec 1998 10:09:19 +0200, Quentin wrote:

>Hi
>Where can I find the specs for USB?

http://www.usb.org


--
Richard A. Smith                         Bitworks, Inc.
rsmithspamKILLspambitworks.com               501.521.3908
Sr. Design Engineer        http://www.bitworks.com

1998\12\14@045200 by Steve Lawther

flavicon
face
    Quentin,

    See my page :-

    http://ourworld.compuserve.com/homepages/steve_lawther/usbdev.htm

    for USB interface / microcontroller chips etc.

    As the iMac is USB only, and Intel's latest concept PCs also are, I
    think USB is going to become the interface of choice (but it'll
    probably be a year or two still!).

    However, it is a more difficult port to write drivers for, and for the
    full speed interfaces, you have to be more tidy building prototypes,
    as it is 12Mbps.

    Steve Lawther


______________________________ Reply Separator
_________________________________
Subject: [OT]ish Specs for USB
Author:  "Quentin" [SMTP:.....qscKILLspamspam.....ICON.CO.ZA] at Exchange-UK
Date:    12/12/98 08:09


Hi
Where can I find the specs for USB?
Maybe I can  start using it instead of normal serial to comunicate with
PIC's.
Anybody tried it yet?

Thanks
Quentin

1998\12\14@063439 by paulb

flavicon
face
Quentin wrote:

> You talking interface like the 232 stuff (MAX232 etc.), which
> condition the signal?  Or is is for encoding, which I suppose the PIC
> can do?

 The latter of course.

 The point I was making with some subtlety(;-) is that the USB is far
*too fast* for a PIC to follow, and the protocol a little complex.  If
either of these things were not the case, and a PIC could do it, then
*why* would they be developing it in the first place praytell?  What
possible use would a *slightly different* version of a slow serial
interface be?

  In combination, there is obviously no way you can possibly do it with
a raw PIC.  Either wait for a PIC with USB hardware inbuilt, or you add
an interface chip.  If you are going to do the latter, you have just
snookered yourself because 1} you *now* have to decide whether to use
asynchronous serial, IÓC or a parallel interface to the PIC and
2} you've jacked up the cost by something like the price of a PIC.

 If your aim was to improve the interface out of the PIC, you've got
absolutely nowhere, and that was I believe, the question as asked.  If
the question was "I have a PIC and I *must* interface it with USB", then
you have no choice anyway.

> OTHA, I am sure USB prices will drop as it gets more popular.

 OTHA?

 Of course they will.  Already are doing; Dave Johnson wrote:

> There are USB controllers available for about a dollar, US.  So not
> bad at all.

 .. and someone mentioned a mouse with a single chip which is either an
ASIC or an embedded processor with USB hardware interface.

Harold M Hallikainen wrote:

> However, Microsoft wants to get rid of all ports but USB, so are we
> gonna be forced to go there?

 Well, yes, and in the same way and to the same extent that 386s and
486s are obsolete and not used anymore.  The fact is, that PCs have an
unworkable interrupt architecture, severely limiting the number of
devices connected.  USB is primarily a way of avoiding this by
effectively sharing one interrupt, supposedly possible with PCI but
historically a deficiency of DOS.

> How about Microchip adding USB to the PIC?

 Of course.  In their own good time.

Steve Lawther wrote:

> As the iMac is USB only, and Intel's latest concept PCs also are, I
> think USB is going to become the interface of choice (but it'll
> probably be a year or two still!).

 It's funny you mention the Mac which was after all, built on the USB,
or at least its slower predecessors (ADB and AppleTalk)!

> However, it is a more difficult port to write drivers for,

 Oh dear, M$ must be involved!
--
 Cheers,
       Paul B.

More... (looser matching)
- Last day of these posts
- In 1998 , 1999 only
- Today
- New search...