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Old 09-23-2003, 10:39 PM
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Default Re: USB 1.1/2.0 Implementation

"Antti Lukats" <[email protected]> wrote in message
news:[email protected] om...
> "SneakerNet" <[email protected]> wrote in message

news:<[email protected]>...
> > Hi All
> >
> > Has anyone successfully implemented USB 2.0 or USB 1.1 protocol in

> > Device. If yes, can you pls start me off. I'm not able to make any

> > in this. I have found couple of sites in ths area, but always end

towards a
> > brick wall.

> if you dont say what your problem is how could one help?
> the USB cores available are working out of box for Xilinx, for altera
> you need to change the technology dependant portions and it should
> again work.
> antti

Hi Antti
Thanks for the response. I actually contacted you regarding USB page that
you mentioned in this newsgroup a while back (Japanese language).
Ok firstly regarding USB implementation, the way I see it, there are 3 major
parts, which are:
1. USB Transceiver (to connect the FPGA and the PC)
2. FPGA Implementation
3. Windows App

1. USB Transceiver - I have found out that the Philips PDIUSBP11A is quite
suitable for this job. However if you look at this pdf (which shows the
circuit connection)
applicationnotes/AN10007-01.pdf , on page 5 of this pdf there are 2 circuit
diagrams. I'm not able to understand the difference between upstream and
downstream circuits. Pls help/advice.
2. FPGA Implementation - Antti, you replyed saying (for altera you need to
change the technology dependant portions and it should again work.). What do
you mean by this? Help Again. Where can I download the USB cores to begin
with? Once I can get hold of the USB core, I guess I'll have a starting
3. Windows Implementation - I have no clue with regards to windows drivers.
Any help in this matter would be very greatful.

Thanks guys

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