How much could be done in an after-market microphone for radios? Assuming
enough milliwatts can be pulled from the rig to power an ultra-low power chip,
it seems an easy way to go for microphones that also have a built in speaker.
--- On Wed, 7/12/11, n8...@yahoo.com <n8...@yahoo.com> wrote:
From: n8...@yahoo.com <n8...@yahoo.com>
Subject: Re: [Freetel-codec2] making radios
To: "Freetel-codec2" <freetel-codec2@lists.sourceforge.net>
Date: Wednesday, 7 December, 2011, 2:54 AM
Frank,
My feeling is that for a mobile, we should strive for a balance between a
totally new way of doing things and what the end user may be familiar with.
Most, if not all, current mobile radios can be tuned from the microphone as
well as from the dial on the front, so this should be where we focus the coding
for the input; direct frequency input from a touch screen is a good thing to
add in a "firmware" update. Developing the mobile version first also has the
benefit that what we add to it can reduce the work needed on the software side
of developing the handheld version.
Matthew Pitts
N8OHU
Sent from my Verizon Wireless BlackBerry
-----Original Message-----
From: "Frank A. Stevenson" <fr...@hvitehus.no>
Date: Wed, 07 Dec 2011 10:02:09
To: <freetel-codec2@lists.sourceforge.net>
Reply-To: freetel-codec2@lists.sourceforge.net
Subject: Re: [Freetel-codec2] making radios
On Tue, 2011-12-06 at 15:23 -0800, Bruce Perens wrote:
[SNIP]
> The plan is to produce a mobile first, because we know we can fit
> everything in the form factor today. The radio design presently looks a
> lot like USRP with a multi-band receiver front-end and transmitter, a
> speaker amplifier and microphone preamp, a Linux system as the built-in
> "host" and application platform, and a touch-screen as the user interface.
I would like to caution against going for a touch screen user interface.
I have worked on such writing touch GUI framework code for years, and
the complexity of making a good touch UI should not be underestimated.
The work involved will also detract significantly from the development
effort needed for just a working SDR radio.
My advice would be to aim lower in the UI look and feel, but still a
little higher than the current mass marked radio. Ex colour screen
320x240, fixed bitmap fonts. Directional navigation key, numeric keypad.
Menu driven UI, with some nice widgets (waterfall etc)
Most importantly, there needs to be a very very clean separation between
UI code and the radio layer, (event driven), such that a touch UI can be
added later without having to do major changes to the radio layer.
Frank
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