Dave Lippincott wrote:
USB is host-client configuration in hardware. The Palm hardware is a
client. It will only work when connected to a host. Most USB devices, such
as a USB to serial dongle, are client only. I seriously doubt a USB to
serial converter would talk to the Palm (also the dongle would need to get
power from the Palm which doesn't provide it). I won't say what you want is
impossible, I just know what doesn't work.
I know there are client devices like a mouse, that you can connect via USB
or PS2 by changing the connector. I'm not sure what hardware considerations
are made for it to work. If there is a way to open the Palm USB port in a
'raw' communications mode much like you can with the IR port on non OMAP
unit, I think you could have a chance. Some hardware to convert logic
levels and signal timings may be needed. I have no idea if this is possible
but I've often thought about it.
That's the point. Serial communication is ridiculously simple. All you
need is a few I/O pins and a timer. I don't know if it exists, but I
don't think it would be too hard to build an adapter. If not through the
USB port, maybe an IR receiver that redirects data to a serial
interface. Wouldn't that be an interesting product? Probably there are
more users trying to integrate their serial toys with a Palm...
Luciano Stertz
----- Original Message -----
From: "Luciano A. Stertz" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Thursday, October 07, 2004 1:37 PM
Subject: Re: Converting mini-USB to serial
Luciano A. Stertz wrote:
[EMAIL PROTECTED] wrote:
Is there a serial adapter I can hook to the mini-USB port of devices
like the PalmOne Zire or Tungsten 2 to connect them to a GPS equiped
with a serial connector (like most of them)? Or is it jut not feasible?
I guess it can't be done. The palm is an USB device, and therefore
must be connected to a USB controller, can't connect to another device.
Hmmm... maybe there's a chance... I was thinking in putting a
USB-serial converter in the GPS and then connect to the Palm. This will
not work. But If you instead put the USB-serial converter in the Palm...
may be possible... I don't know how these converters work. If you can
someway send / receive arbitrary data from its serial interface,
technically you can communicate with any serial device...
--
For information on using the Palm Developer Forums, or to unsubscribe,
please see http://www.palmos.com/dev/support/forums/
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/support/forums/
