Which class to use?

Hi to all,

i am planning to start developing a usb device which has to send continious
numbers to the application. I don't want to write a driver. Can i use the
drivers already existing. If so which device class can i use for that.
Pls shre ur knowledge with so that i can finish my mini project by capturing
continious data from usb.

Robert
Mon May 15 08:31:14 CDT 2006

Ramesh wrote:

> Hi to all,
>
> i am planning to start developing a usb device which has to send continious
> numbers to the application. I don't want to write a driver. Can i use the
> drivers already existing. If so which device class can i use for that.
> Pls shre ur knowledge with so that i can finish my mini project by capturing
> continious data from usb.

What is the data rate and how precise should "continuous" be?
"Without driver" almost requires the use of the HID class, but depending
on the answer to the question it may be impossible to use.

Maxim
Mon May 15 08:50:23 CDT 2006

Depends on your timing requirements. Do you need to know the exact moment
of time when your next data was sent?

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"Ramesh" <Ramesh@discussions.microsoft.com> wrote in message
news:C47D71FC-B68C-4C03-8E33-1AC359855535@microsoft.com...
> Hi to all,
>
> i am planning to start developing a usb device which has to send continious
> numbers to the application. I don't want to write a driver. Can i use the
> drivers already existing. If so which device class can i use for that.
> Pls shre ur knowledge with so that i can finish my mini project by capturing
> continious data from usb.

Ramesh
Mon May 15 08:56:01 CDT 2006

thanks for ur response
my h/w will send 40 bits per second. So can i use the HID class. if not hw
can i proceed. upto wat rate the hid wil support

"Robert Marquardt" wrote:

> Ramesh wrote:
>
> > Hi to all,
> >
> > i am planning to start developing a usb device which has to send continious
> > numbers to the application. I don't want to write a driver. Can i use the
> > drivers already existing. If so which device class can i use for that.
> > Pls shre ur knowledge with so that i can finish my mini project by capturing
> > continious data from usb.
>
> What is the data rate and how precise should "continuous" be?
> "Without driver" almost requires the use of the HID class, but depending
> on the answer to the question it may be impossible to use.
>

Ramesh
Mon May 15 09:00:02 CDT 2006

Thanks for ur response,
Im new for this so can u explain detaily, so that i can get some idea about
it.

"Maxim S. Shatskih" wrote:

> Depends on your timing requirements. Do you need to know the exact moment
> of time when your next data was sent?
>
> --
> Maxim Shatskih, Windows DDK MVP
> StorageCraft Corporation
> maxim@storagecraft.com
> http://www.storagecraft.com
>
> "Ramesh" <Ramesh@discussions.microsoft.com> wrote in message
> news:C47D71FC-B68C-4C03-8E33-1AC359855535@microsoft.com...
> > Hi to all,
> >
> > i am planning to start developing a usb device which has to send continious
> > numbers to the application. I don't want to write a driver. Can i use the
> > drivers already existing. If so which device class can i use for that.
> > Pls shre ur knowledge with so that i can finish my mini project by capturing
> > continious data from usb.
>
>

Robert
Mon May 15 09:31:35 CDT 2006

Ramesh wrote:

> thanks for ur response
> my h/w will send 40 bits per second. So can i use the HID class. if not hw
> can i proceed. upto wat rate the hid wil support

Even a low-speed HID device can do 1.5 KByte per sec.
A full-speed HID can do 64 KByte per sec.

Do you really want to develop your own HID device for that?
Something like our IO-Warrior http://www.codemercs.com should be more
than sufficient.

For learning more about USB go to http://www.lvr.com
Best buy Jans book. It is considered the best.