Hello,
This
depends on your final goal. You did not said if you need full or low speed or if
you intend to have this function included as a module, a PCI card or on the
mother board.
If i
was in such a position, I would buy a small µcontroler (ST ones for example) and
build a RS232 to USB function bridge.
The
USB part can receive the frames from the host and this can be transmitted to the
peripheral PC on RS232 cable.
This
would be an easy project where you would just have to define the RS232 packets
protocol.
You
can also access a small µcontroller via a PCI bridge on a card plugged on the
bus.
Hardware would be more difficult but the whole work would be the same
(Defining a kind of protocol).
Regards,
Thierry
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