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Message
From: christian@m...
Date: Wed, 27 Aug 2003 14:42:02 +0200
Subject: Re: [usb] IP Core vs. USB chip...
Hello,
The PDIUSBP11 has an I2C interface. So, I have to install in my FPGA a
I2C interface IP, USB PHY and a USB 1.1 function core IP. Do I have to
write a firmware in order to receive the requests from the host and
prepares the data to send through the I2C interface.
Best regards
----- Original Message -----
From: Rudolf Usselmann <rudi@a... >
To: usb@o...
Date: 27 Aug 2003 12:11:26 +0700
Subject: Re: [usb] IP Core vs. USB chip...
>
>
> On Wed, 2003-08-27 at 02:26, christian@m... wrote:
> > I dont really understand. Anyone can correct me if i make a
> mistake.
> >
> > We can implement in the Cyclone FPGA a USB 1.1 IP. I can plug
> the
> > device on the Avalon Bus and assign address range with the
> SOPC
> > Builder. And the IP is free and easy to install, Right?
>
> Christian,
>
> yes, that is correct. However, you DO need an external
> transceiver that goes between the FPGA and the USB bus.
> (Unless the Cyclone FPGA has usb transceiver build in).
> Thats a $0.50 part, requires 6 pins on the FPGA side
> and two to the USB bus. The issue Ken raised was if I
> need an external part anyway, why not get an entire
> SoC with USB build in. Like many are available from
> Cypress for example.
>
> And, yes, it is free !
>
> An example transceiver is the PDIUSBP11P or ISP1501
> from philips. It is required because the USB bus uses
> a special differential driver that can generate single
> ended '0' or '1' on demand.
>
> > Second, about the USB drivers, i want to know if a ucLinux
> driver is
> > available for this USB 1.1 IP?
>
> Don't know if a free driver is available, our software
> guy used the generic USB driver example in Linux to
> create a driver for our project, took him like an hour
> of hacking ...
>
> > Regards
> >
> > Christian
>
>
> Cheers,
> rudi
> --------------------------------------------------------
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