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<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>It's not as easy as that. There ARE some USB host
controller chips out there. Using them is far more difficult (assuming
you're not just connecting to a standard HID or mass storage device) than
building a USB client ('function' in USB terms) device.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>Even when the low-level stuff is taken care of, you've got
absolutely no standards to govern how the GPS receivers use that
connection. Many (most?) GPS manufacturers might not even KNOW how their
devices use USB, because they use an off-the-shelf device (like those by FTDI)
for the USB interface, and the vendor supplies the host drivers. If they
don't provide a driver for your host environment, you're pretty much
stuck. Fortuantely Garmin at least documents that part, to some extent
anyway.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>To get an idea of how bad the problem is, check out the
/usr/src/linux/drivers/usb/serial directory on a Linux box. All of those
drivers are there to support USB to serial converters, including some used in
certain GPS receivers.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>Still, I do plan to take a crack at it, at least for Garmin
units. I just need to determine if it's feasible first. If they all
go into a blank screen as soon as you hook them up to a PC, there's no
point.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>Scott</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=031293220-12062007><FONT face=Arial
color=#0000ff size=2>N1VG</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> aprssig-bounces@lists.tapr.org
[mailto:aprssig-bounces@lists.tapr.org] <B>On Behalf Of </B>Andrew
Rich<BR><B>Sent:</B> Tuesday, June 12, 2007 1:21 PM<BR><B>To:</B> TAPR APRS
Mailing List<BR><B>Subject:</B> RE: [aprssig] Compatible GPS for waypoint
upload?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><SPAN class=578562020-12062007><FONT face=Arial color=#0000ff size=2>Time
to start adding FTDI chips to APRS projects perhaps ?</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
aprssig-bounces@lists.tapr.org [mailto:aprssig-bounces@lists.tapr.org]<B>On
Behalf Of </B>'Scott Miller'<BR><B>Sent:</B> Wednesday, 13 June 2007 5:31
AM<BR><B>To:</B> 'TAPR APRS Mailing List'<BR><B>Subject:</B> RE: [aprssig]
Compatible GPS for waypoint upload?<BR><BR></FONT></DIV>
<DIV dir=ltr align=left><SPAN class=703442819-12062007><FONT face=Arial
color=#0000ff size=2>I've got a related question, for those of you with USB
only automotive GPS receivers. I know at least some of the Garmins
still support waypoint uploads (from MapSource?) via USB. When you
plug the device in to USB, what happens? Is the device still usable as
usual, or does it display a different screen? In other words, if you
had a PC connected to the device instead of a tracker, would it be able to
plot waypoints in a way that would be usable for APRS?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703442819-12062007><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=703442819-12062007><FONT face=Arial
color=#0000ff size=2>Scott</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=703442819-12062007><FONT face=Arial
color=#0000ff size=2>N1VG</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> aprssig-bounces@lists.tapr.org
[mailto:aprssig-bounces@lists.tapr.org] <B>On Behalf Of </B>Wes Johnston,
AI4PX<BR><B>Sent:</B> Tuesday, June 12, 2007 12:23 PM<BR><B>To:</B> TAPR
APRS Mailing List<BR><B>Subject:</B> Re: [aprssig] Compatible GPS for
waypoint upload?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>GPSmap 276c</DIV>
<DIV>Wes<BR><BR> </DIV>
<DIV><SPAN class=gmail_quote>On 6/12/07, <B class=gmail_sendername>Stephen
Peters</B> <<A href="mailto:scpeters@mac.com">scpeters@mac.com</A>>
wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hello
all,<BR><BR>I've been looking around for an automotive style GPS
(autorouting,<BR>good basemaps, color screen etc) that can accept
waypoint uploads. <BR>I've been disappointed to find that most of the
modern GPS units do<BR>not include an NMEA-0183 serial port, and instead
only a USB port.<BR><BR>With the advent of so many "waypoint upload"
style APRS products, Can <BR>anyone recommend a good GPS unit to connect
to the other end of such<BR>a device!<BR><BR>For example, none of the
Garmin NUVI series would work, neither would<BR>the modern Magellan
units that I've seen. The Tomtom website doesn't <BR>even
provide enough information to determine if the port exists!<BR><BR>There
are some intriguing(?) products that could serve this market,<BR>but I
don't know much about them, for example:<BR><<A
href="http://www.navigadget.com/index.php/2007/06/07/woots-done-it-again-7-">
http://www.navigadget.com/index.php/2007/06/07/woots-done-it-again-7-</A><BR>gps-navigation-with-20gb-hdd-for-250/><BR><<A
href="http://www.tigerdirect.com/applications/SearchTools/item-details.asp">http://www.tigerdirect.com/applications/SearchTools/item-details.asp
</A>?<BR>EdpNo=2529863&Sku=D158-1706><BR>(Maybe one of them could
run Xastir??)<BR><BR>Do you have a GPS that you use with $GPWPL sending
hardware that you<BR>would recommend?<BR><BR>I am already familiar with
the Garmin 276c, and a number of the older <BR>monochrome
units.<BR><BR>Thank you in
advance,<BR><BR>-Steve<BR><BR>_______________________________________________<BR>aprssig
mailing list<BR><A
href="mailto:aprssig@lists.tapr.org">aprssig@lists.tapr.org</A><BR><A
href="https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig">https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig</A><BR></BLOCKQUOTE></DIV><BR><BR
clear=all><BR>-- <BR>In theory there is no difference between practice and
theory. </BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>