gnupic: USB
Subject:
RE: USB
From:
"James Newton. Admin 3" ####@####.####
Date:
21 Mar 2002 19:37:19 -0000
Message-Id: <000101c1d10e$ad666200$0600a8c0@efplus.com>
Guilty as charged re: PC=Windows... sorry. Do your professional developers
work for hire? Just for future reference.
How does ftdi NOT get one past the driver issue? They supply the drivers,
ready to go, plug and play or as simple DLLs. Done. No development
necessary.
http://www.ftdichip.com/FTDriver.htm
And the web address is
http://www.ftdichip.com They sell USB chips, not flowers <OOPS> My bad.
I have no doubt that Cypress chips are great... but they seem to only target
big name developers. I'd love to be wrong about that.
Your CUMP joke is being ignored... <SNIF>
---
James Newton, Host of sxlist.com
1-619-652-0593 VM 1-208-279-8767 FAX
####@####.####
SX FAQ: http://www.sxlist.com
-----Original Message-----
From: Scott Dattalo ####@####.####
Sent: Thursday, March 21, 2002 10:27
Cc: Gnupic@Linuxhacker. Org
Subject: RE: USB
Importance: Low
On Thu, 21 Mar 2002, James Newton. Admin 3 wrote:
> Scott, have you been able to find / write / out source the writing of the
PC
> driver part of the USB support for the Cypress parts?
Not being a Linux person I assume you've equated PC=Windows. On the
windows side, I work with a group of professionals that, well, do this for
a living. If I were to write a driver myself, then I'd dive into Linux
sources (but that'd be a Linux driver now, wouldn't it?:). Still, between
MSDN and the Linux sources, there is tons of info on writing USB drivers.
Cypress does have appnotes on how to write a HID driver and how you can
pass information via the HID infrastructure. This is sub-optimal
unfortunately.
<SNIP>
>
> http://www.ftdi.com has a very nice little full speed USB 1.1 chip set
(very
> low cost also) and super simple drivers free for download as DLL, etc...
> even sample code in VB, C, etc.. I picked up an entire development kit for
> $27 and some download time (that is $27.00 US dollars) from
> http://www.gigatechnology.com Super simple, works great, easy to
interface,
> easy to use. 12Mbps or 1MBps.
Doesn't get you by the driver problem though...
The FTDI chips are still hacks, albeit quite nice. If you're going to do a
high volume commercial USB device, like a TouchPad for example (I work for
Synaptics and that's our primary product), I can almost guarantee that
you'll end up with a Cypress chip. It's just too cost effective when you
start adding everything up.
> ftdi tells me they are coming out with a USB 2.0 full speed version in
June.
> No plans for a high speed version from what I gather.
Cool! (Doesn't full speed by definition also mean High Speed is
supported too?). I think this may be a good chip for the CUMP project.
Scott
