Yup those documents definitely cleared the question up. Just in case anybody else
cares and isn't aware, the Visor Edge cradle connector contains pins that support BOTH
a
simple serial interface (TXD and RXD pins only) AND a USB interface as well. To quote
the technical documentation (TechRef_VisorFamily_100, pg 34):
'USB and Serial lines are not shared on the Cradle Interface. In fact, for debugging
purposes, some developers have started with the serial cradle and wired in USB lines.
The
debugger can be forced to use USB, while applications continue to communicate through
the serial port.'
Very interesting. Thanks again for the help.
Stuart Nicholson
Software Engineer
Wireless Data
-----Original Message-----
From: Gregory Fung [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, August 28, 2001 9:58 AM
To: Palm Developer Forum
Subject: Re: Handspring Visor Edge with 2 serial ports?
What I do know about the Springboard port (I'm building custom hardware
myself) is that springboard is not a serial port; it is a CPU bus extension
that gets mapped into memory (usually 0x28000000, but use proper API
lookups for it). As a guess, the second serial "port" may used to seperate
the IR data stream from the cradle data stream, so they can operate
independently.
Springboard specs and specs for each model are at
http://www.visor.com/developers/documentation.jhtml. I'm not sure if you
are refering to these files, but they are technical in nature.
-------------------------------
Message 59891 of 59898
From: Stuart Nicholson <[EMAIL PROTECTED]>
Date: Mon Aug 27, 2001 8:36 pm
Subject: Handspring Visor Edge has 2 Serial Ports?
I notice Steve Sabram mentions in another thread that the Handspring Visor
Edge
has 'two real and seperate serial ports'. A Palm device with multiple
physical
serial ports is
of interest to my employer, however I can't find any useful information re
the
Visor Edge hardware on the Handspring website (it's all glossy market-speak
:)).
On the developer's site the only relevant documentation describes the
'normal'
serial port (ie. the cradle port on the bottom of every Palm device).
I assume the second physical serial port is a feature of the hardware used
to
support the piggy-back 'removeable springboard' support on the top rear of
the
Visor Edge. Is this
the case? And is any magical required to use this connector as a second
serial
port?
I'd appreciate it if somebody could direct me to the appropriate tech specs
on
the Handspring site!
Gregory Fung
[EMAIL PROTECTED]
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