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can i take analog signal to the led display by Propeller chip — Parallax Forums

can i take analog signal to the led display by Propeller chip

ditter17719ditter17719 Posts: 1
edited 2011-01-31 15:50 in Propeller 1
i am the beginner

i want to know how to read the signal just like the Oscilloscope by using the propeller chip
how to write code? any one can explain me the step to write

thank you

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2011-01-30 07:57
    There is an application note (AN001 - Propeller Counters - here) that explains how to do analog to digital conversion using the Propeller. There are sample programs for that and other uses of the counters.

    In the object exchange, there are other programs that use this analog to digital capability (see Microphone to Headphones and Microphone to VGA here).
  • SeekerSeeker Posts: 58
    edited 2011-01-31 15:50
    Mike Green wrote: »
    In the object exchange, there are other programs that use this analog to digital capability (see Microphone to Headphones and Microphone to VGA here).

    Funny you should mention it... Microphone to VGA is something I have been trying to get working on the Demo board. I just get a gray central region on the screen with white bars on the sides. It slowly starts to darken from the top, sort of like clouds moving in, until the entire screen is almost black. Sometimes it has one to three vertical white bars down the center, but not always.

    To me it seems like it might be a sync problem. I am using a 17" LCD monitor... and maybe it cannot handle the slow 67hz refresh rate. I like to take existing routines and pick them apart to learn and this is the one I am trying to learn now. Any ideas?

    Thanks.
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