Dennis Crawley <dennis.crawley <at> usa.net> writes:

> On Wednesday, April 11, 2007 1:11 PM [GMT-3=CET],
> Peter P.  wrote:
> 
> [snip]
> > Yes, thanks. I copied a table carelessly while concentrating on other
> > aspects. I will likely add a sounder and later a discriminator (receiver)
> and
> > republish the code.
> >
> > Peter P.
> 
> Discriminator.
> ... An adjustable band pass digital-filter? DFT? FFT?. Sounds like a lot of
> work. The user dictates the cut off frequencies so the "reader" can
> discriminates one cw transmission form another?

Most likely a time domain discriminator (phdspeak for autobauding morse
decoder). But later frequency sensitive things may be added. Although the DSP
performance of the pics I use for this project is not in that league at all
something nice could be imagined and tested (f.ex. a switched capacitor filter
driven by two phase clock produced by the pic).

The sounder already works but the code is un-clean. I'm still well under 200
words. I think that I can fit a complete sender and receiver in the smallest
available pics (12{c,f}508} with an external eeprom for some fun projects. 

Peter P.


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