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I/O assitant PLL documentation? — Parallax Forums

I/O assitant PLL documentation?

RegorRegor Posts: 19
edited 2006-10-31 22:00 in Propeller 1
I've been looking in the manual and examples·but other than microphone_to_headphone.spin I·can't find any explainination of·how·to use the I/O assistant + PLL. I'm specifically looking for if its possible, and hopefully examples, on how to do AM and FM demodulation·for making a scanner.

Any pointers to additional documentation would be appreciated.

Comments

  • cgraceycgracey Posts: 14,133
    edited 2006-10-31 18:17
    Maybe you haven't seen this...

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    Chip Gracey
    Parallax, Inc.
    spin
    spin
    CTR.spin
    23K
  • RegorRegor Posts: 19
    edited 2006-10-31 18:28
    No I hadn't. For some reason my eyes read the file as CRT.spin so I never openned it.

    I'll look it over.

    thanks,
  • Graham StablerGraham Stabler Posts: 2,507
    edited 2006-10-31 19:55
    I'm sorry to say that I didn't find that program of much help. Its mainly what is in the manual and that didn't help much either. Looking forward to Paul's further documentation.

    Graham
  • Paul BakerPaul Baker Posts: 6,351
    edited 2006-10-31 22:00
    Regor, Im afraid you'll be disappointed. The PLL for the counter module is only active for modes 1-3. These are useful for generating high frequencies, but not for reading them. You may be able to do some sort of external phase detection circuitry where the Propeller provides the reference frequency, but communications is one of my weakest subjects in the field so I won't be able to help you much.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
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