I have several designs for a client where I use the FTDI Chips FT245 USB
chip to handle the communication between the system and the PC.  In some
the FT245 talks to a PIC (usually 18F6250) but in one case it connects
to a CPLD which is running a state-machine and ADC to get more sampling
speed throughput than the PIC could manage.  One system can sustain
about 6Mbit/second transfers.  I'm being a bit vague about the guts of
the design since there is an NDA in place.  But once the PC initiates
the sampling process, it runs (controlled by the PIC or CPLD) until the
PC sends a "stop" command some undetermined time later.  Meanwhile data
streams to the PC.

My question is (and I'm just starting to look around) what devices are
available to provide a wireless connection, 8-bit wide FIFO like FT245,
at rates near 10MBit/sec over a distance (clear-line-of-sight) of at
least 50ft, 100ft preferred.  Power is not an issue, while it is to be
portable, portable in this case means something smaller than a notebook
that can rest on a small cart.  Cost is an issue, I'm hoping for less
than $250 in singles for any kind of OEM module.

Of all the "replace your serial cable with wireless" products, most just
aren't fast enough at maximum speeds of 115kbps to 192kbps.

Redesigning to use wireless Ethernet is possible but would probably
require removing the PIC18F and substituting something a bit bigger, ARM
perhaps, to have a decent throughput.

Last thing, I'd rather have a pre-certified solution (US and EU sales).

Rob
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