On Sun, 2007-07-29 at 10:39 +0100, Howard Winter wrote:
> Does anyone know of a "reverse" USB to serial adaptor?  That is, one into which a USB peripheral is plugged, and which produces a serial output - in 
> this case it's a GPS receiver with a USB interface and I want to use it with something that isn't a PC and which expects RS232.
> 
> I suppose it's a tricky thing to do, since the USB interface is intelligent, and the peripheral won't just send data until it's done the enumeration thing - 
> but I thought I'd ask just in case it's been done!  :-)

Haven't heard of one, certainly not trivial to build, although FTDI has
those new Vinculum controllers which might be able to do it easily.

That said, every USB GPS device I've seen has actually been a serial GPS
device with a USB-serial bridge chip, usually somewhere in the cable. If
it's not in the cable then it's usually a small chip on the board inside
the case. Another option is to just get a GPS with serial interface,
they're still around.

TTYL

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist