Interesting. I would push very hard to not re-invent the wheel with this. Existing CAT standards (there are too many already) have frequency setting already built in. My first question would be to ask why these commands could not be used. If using the Elecraft/Kenwood format, the FA (or FB) command should be able to do the task quite well to set the center frequency. Actually, this should be rather easy to implement; the biggest problem would be the RS-232 interface chip and its associated voltage inverters which would create noise for the radio. There are ways around this that eliminate the problem (think Dallas DS275).
In other words, this is a relatively easy problem to solve, and can be solved _very_ quickly. Now if you want to add the DSP routines into the chip as well, we have more work to do. It will take a bigger processor than the simple PIC and a good stereo CODEC. But this is very solvable as well. It just takes ( a lot?) more time. Sounds like a good learning project, though. So Pete, exactly what do you want in the interface? On May 20, 2008, at 11:13 AM, kc0vkn wrote: > Pete and I were trading emails earlier and I think it's more along > the lines of an SDR CAT. > > One way to look at it may be an attempt now to write a command > set so that folks doing > whatever interfacing (PIC, PicAxe, Amtel, MSP430 etc..etc) would be > able to use a canned set > of functions to provide some sort (serial, whatever) control over > things like band switching. > Assuming other folks have already broken ground by providing such > code. > > We might be able to come up with a standard (or use an existing > one), that'd let folks be > creative in how they manage their SR's but also mean that any > software development for the > front-end would have a standard interface to the hardware. > > Is this along the lines you were thinking Pete? > > Joe, KC0VKN > > > ------------------------------------ > > Yahoo! Groups Links > > > - Jack Brindle, W6FB ------------------------------------------------------------------------ ---------------------
