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Porter,
The chips John mentions are virtual COM port chips used many of the USB adapters you mention. Virtual COM is still the best way for direct USB from StampPlot and only feasible for now. The chips are very low part count.
Good examples are Parallax newer boards, they have schematics posted using the FTDI's and they are a distributor of them. A good example is the Propeller Demo Board.
Martin
-----Original Message-----
From: selmaware@yahoogroups.com [mailto:selmaware@yahoogroups.com]On Behalf Of John Gavlik
Sent: Saturday, February 09, 2008 10:23 AM
To: selmaware@yahoogroups.com
Subject: RE: [StampPlot - Selmaware] PIC with USB
Porter,
I would recommend the FTDI serial-to-usb chip http://www.ftdichip
.com/FTProducts. htm#FT232R
I’m about to use it for a SP application in lieu of the adapter you mention.
John Gavlik
From: selmaware@yahoogrou
ps.com [mailto:selmaware@ yahoogroups. com] On Behalf Of porter.sadler
Sent: Saturday, February 09, 2008 4:48 AM
To: selmaware@yahoogroups.com
Subject: [StampPlot - Selmaware] PIC with USB
I've prototype my project with a stamp and serial com. Moving to the
next step pics with max 232 is cheaper, but serial is disappering. I
want to rebuild my project with a PIC and USB interface. i prefer not
to use a serial to USB adapter/defeats cost goal
Can i use a straight USB interfeac to stampplot
What steps are required make it to work
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