When you plug in a high speed USB disk you wouldn't expect
the data to be handled via rs232 emulation would you?
High speed USB disks use serial protocol - the transport is
the same as RS-232 but does not include the +/- 10-12V drivers.
Support for high speed serial data transfer (e.g., USB hard
drives, cameras, etc.) is the primary reason that modern
USB adapters no longer support 45.45 baud 5 bit codes!
73,
... Joe, W4TV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jeff Herr
Sent: Monday, March 15, 2010 11:10 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] USB to serial angst - move beyond emulation
Why use rs232 emulation at all?
Emulation = not necessarily a good thing
When you plug in a high speed USB disk you wouldn't expect
the data to be handled via rs232 emulation would you?
When you plug in a Ethernet device you wouldn't expect the
data to be handled via rs232 emulation would you?
Why use emulation at all? I know, I know, HRD
A telnet interface on the Elecraft side via Ethernet, all
native, would require no drivers on the pc side. A native USB
interface could be done the same way.
Both would require a supporting application and/or library on
the pc side, but would work well and be very high performance
and stability. Both would require firmware support on the
Elecraft side..as does the existing rs232 methodology.
But the result ... No drivers to load, no silly
configuration, no conflicts with other serial devices, no
baud rates to set.
Let's face it, 232 emulation over USB is messy and it's a
remnant of the past. Just the fact that all of us have been
exposed to so much trouble is a bad indicator.
My bet is the chipset isn't the problem it's the interface on
the pc side. I think that lack of standards in this niche
have resulted in a lot of sloppy code that sort of works
but does not tolerate change. i.e. using a diff USB port.
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