"presets" probably refers to the defines we now know and love,
although there is a 'table' of settings at the end of
tos\platform\mica2\CC1000Const.h
Chipcon (via TOS) provides a program for generating the "manual
settings" for any desired frequency, and I expect that was used
to make the preset channels.
Just remember: "I before E except after C except in recEIved"...
It's the exception to the exception that proves the reproof of the rule.
English, as the Saxons meant it to be...
MS
Benjamin Madore wrote:
On Wed, May 2, 2007 2:16 pm, Michael Schippling said:
Perhaps you were looking at the 433Mhz channels which are rather
under-represented. I assumed you meant 916Mhz because that's what I use...
Probably have to go back to the spec sheet to see if there are more
otpions available in the lower freqs.
MS
Yeah, I wasn't thinking and forgot to specify 433 MHz. It's clearer to me now.
The other set of frequencies I have found so far are:
CH 1 - 433.02 / 433.09
CH 2 - 433.64 / 433.71
CH 3 - 433.20 / 434.27
CH 4 - 434.71 / 434.78
in transmit/receive pairs.
(I have the worst problem with 'i' before 'e' except after 'c'. I keep
getting bugs in my code.)
I also found:
--
The CC1000 uses a digital frequency synthesizer to select a particular
send/receive channel. Specific control registers are programmed with values
according to the channel and FSK separation used. Because of the nature of
the synthesizer, it is only capable of reproducing discrete frequencies in
the operating range of the device. The manufacturer provides tools to
determine these optimal frequencies and their associated control values, but
they are unintuitive and cumbersome to use.
The TinyOS stack and related tools take the guesswork out of tuning the
CC1000 for the MICA2 series motes. The stack will automatically compute the
nearest channel for a given frequency and program the necessary register
values (manual tuning), or use pre-determined values from a preset table
(preset tuning). In addition, the channelgen tool provides a means to
verify the actual channel used by the radio and simplify the generation of
new presets.
--
I thought it meant that there was a table in the source code, but I can't
find the 'preset table' anywhere. I'm also still a little confused by the
explanation above.
-Ben
Could someone point me to a document that lists the discreet channels
on
the
CC1000. I know I've seen something on it at one time, but I can't remember
where, and a search of the archives and Google hasn't turned up what
I'm
looking for.
There's just a few listed in the Makefile for Crossbow, and I'd like
the
whole list.
Thank you.
-Ben Madore
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