[Elecraft] Elecraft Digest, Vol 136, Issue 14

[ae4pb at carolinaheli.com]

Sorry to disagree David, USB is a BUS. It's specifically designed to be able
to connect multiple devices to it.
https://en.wikipedia.org/wiki/USB

Jerry Moore
Future Owner 


Message: 14
Date: Thu, 06 Aug 2015 19:43:02 +0100
From: David Woolley <forums at david-woolley.me.uk>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Developing Products, the Elecraft Way
Message-ID: <55C3AAB6.5030309 at david-woolley.me.uk>
Content-Type: text/plain; charset=utf-8; format=flowed

On 05/08/15 16:21, Jerry Moore wrote:
> My thoughts would be that all devices use the USB instead of RS232. By
> design the USB is a BUS rather than a point to point protocol as is RS232.

In spite of its name, USB is not a bus.  At the physical level, it is 
most definitely point to point, and, unlike RS232 cannot be abused into 
a bus configuration.

It does have a network layer, although I think that only supports 
unicast.  RS232 is only a physical layer specification, and not a 
complete one.  Anyone using the internet before ADSL almost certainly 
was using RS232 as the first hop to a global network.

-- 
David Woolley
Owner K2 06123