I read "short distance..." after sending my stuff. I think you
are correct about the I2C electrical connection, but I still
think Elecraft needs a box to box communication protocol which
allows multi-masters. USB would do, but probably isn't the only
choice. Ethernet?
There is a question of just how much distance needs to be
supported. If you have your KPA500 at the base of your antenna,
that is quite a distance, on the other hand, you probably don't
need to control you K3 from there.
73 Bill AE6JV
On 1/16/17 at 8:23 PM, wes_n...@triconet.org (Wes Stewart) wrote:
Bill,
I dunno. I'm an RF guy and this uProcessor stuff makes my eyes glaze over.
That said, your own reference says in part: "short-distance,
intra-board communication." It seems to me that the problems
seen are related to interconnections between the K3 and the
K-Pod. And it seems the longer, the worser.
As I understand it, and I could very well be totally wrong, a
couple of micro-controller pins are brought out to an
unshielded connector without any buffering or filtering. From
that point the environment is anyone's guess. The only reason
that there isn't one of Jim Brown's Pin 1 problems, is pin 1
isn't used :-)
Wes N7WS
On 1/16/2017 8:08 PM, Bill Frantz wrote:
It is likely that the interface used by the K-Pod is the I2C
bus <https://en.wikipedia.org/wiki/I%C2%B2C>, a very commonly
used bus in the chip world. I use it to connect the real-time
clock board to my BeagleBone Black board.
I2C is a 2 way, multi-master bus protocol that might be ideal
for tying the ever-growing collection of Elecraft devices.
We would really like to send commands from whatever device
we're using, whether it is the controls of the K3, a keyboard
attached to a P3, the panel of a KPA500, or the K-Pod. While
USB could support this kind of network, I2C is much simpler
and cheaper. RS232, as a point to point protocol, really
shouldn't be considered.
73 Bill AE6JV
-----------------------------------------------------------------------
Bill Frantz | Since the IBM Selectric, keyboards have gotten
408-356-8506 | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?
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