Hi!
There is a chip from nxp, cortex-m0 based, lpc11u12 to be announced
soon, which should be in the price range of 1-2E. It implements only
full speed usb, but that would be more than enough most of the time.
If high speed is needed, it will not be an alternative to FT2232H. but
for jtag programmers for ex. it will be more than enough, I guess.
The VID/PID could be customizable, just as in FT chips, so it is up to
the user's discretion if he or she uses his own VID/PID, or not.
I don't think the FIFO would be a problematic thing, although its size
won't be 64k for sure.
Regards,
Ákos
On 26 September 2011 12:04, Uwe Bonnes
<bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>>>>> "Xiaofan" == Xiaofan Chen <xiaofanc@xxxxxxxxx> writes:
>
> Xiaofan> On Mon, Sep 26, 2011 at 5:02 PM, Akos Vandra <axos88@xxxxxxxxx>
> Xiaofan> wrote:
> >> Hi!
> >>
> >> Thank you for the warning - I know this might have some legal issues
> >> attached, which I will look into before starting the implementation.
> >> However I find it very unlikely that it would be illegal to implement
> >> a protocol which is compatible with another. If that would be the
> >> case, libftdi itself would be troubled too.
> >>
> >> I don't intend to use the FTDI chips' VID/PID, and I don't intend to
> >> sell these units for a profit either. I am sorry if I offended
> >> anyone, I thought that a cheaper alternative would be welcomed by
> >> all.
>
> Xiaofan> I do not think you offended anyone. I am just give a warning.
>
> I don't think that implementing an USB command compatible clone is a
> problem. The API is documented in the linux kernel ftdi_sio driver and
> libftdi. The reuse of FTDI VID/PID would be.
>
> But I doublt the usefullness. No low price cortex I know of has a build in
> high speed YSB phy, and implementing something like synchronous FIFO will be
> hard.
>
> Bye
> --
> uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
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> --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
>
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