Shop OBEX P1 Docs P2 Docs Learn Events
BP 2E Motherboard info — Parallax Forums

BP 2E Motherboard info

hitswarehitsware Posts: 156
edited 2009-05-05 14:21 in BASIC Stamp
http://www.parallax.com/detail.asp?product_id=28300

The above link seems dead.

I want to see how to program the PWM

on the motherboard.

Comments

  • sylvie369sylvie369 Posts: 1,622
    edited 2009-05-04 20:26
    Try this one:

    http://www.parallax.com/Portals/0/Downloads/docs/prod/boards/28300-AVR_GPIO-3-0906.PDF
  • hitswarehitsware Posts: 156
    edited 2009-05-04 20:53
    Thank You ! [noparse]:)[/noparse]
    Looks like the frequencies are not fine
    tunable enough for my purpose (music).
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2009-05-04 21:08
    The link cited by hitsware is from Parallax's old website, before the latest upgrade. The newer product links tend to be a lot longer, so the best way to find a product now is to "Search" on the part number — 28300 in this case.

    The coprocessors' PWM frequencies start at 37.5 KHz with duty cycles specified to 8-bit precision. The available frequencies are limited to 2n submultiples of 37.5 KHz. For musical notes, you might want to look at the SoundPAL.

    -Phil

    Post Edited (Phil Pilgrim (PhiPi)) : 5/4/2009 9:14:35 PM GMT
  • hitswarehitsware Posts: 156
    edited 2009-05-04 22:10
    >Parallax's old website

    Hmmm. That's the url Google gives.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2009-05-05 02:33
    At one point Parallax had promised to implement forwarding from the old product links to the new pages. But doing so was either too difficult, or they decided just to make a clean break with the past. The Search works better anyway, since it often brings up related products. Dunno what's up with Google. Maybe you need to dump your cache. I didn't get that old link when I did a search.

    Can you tell me a littlle about your music app?

    -Phil
  • hitswarehitsware Posts: 156
    edited 2009-05-05 14:21
    >Can you tell me a littlle about your music app?

    I enjoy 'chip music'.
    I did this:

    http://home.comcast.net/~mnjmiller/newisland.wav

    with BBC Basic, and it works pretty well
    except no stereo and awkward (code for) envelopes.
    I have a PWMPAL that I may try again with vactrols
    for envelopes and stereo steering.
    Also I think I'll try:

    http://oopic.com/soundgin/

    along with:

    http://www.multilabs.net/Retro.html

    and see how easy that is to code.
    If the programming gets too tedious,
    I loose the fun of the music itself.
    Thanks for the interest [noparse]:)[/noparse]

    Post Edited (hitsware) : 5/5/2009 2:48:20 PM GMT
Sign In or Register to comment.