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Propeller I/O limitations — Parallax Forums

Propeller I/O limitations

navigatornavigator Posts: 10
edited 2010-03-04 08:28 in Propeller 1
I have been using the C-Stamp, and have looked at the propeller with awwwwww.

Has anybody thought of a combonation project with the propeller doing the heavy lifting and a PIC18F6720 ro PIC18F8720 to handle the overflow needs for more I/O ????

I have been thinking of this very thing as of late. I already have the propeller chip, and the pair of PIC's are on there way from Microchip Direct.

My robot is based on parts from Lynxmotion. A mobile base with tracks and an arm mounted on it. The drive motors have encoders witch supply sign and cosign signals (one for each side), ultra sonic ranging, coil gun, (to entertain the kitty :-), and 300mW laser, 2line x 20 lcd and 25 button keypad.

OOOPSSS i got carried away.

Just wanted to ask about the combonation processor bit.

Thanks for your time and intrest. Any ideas would be great.

BYTE name·= (NAVIGATOR);

Comments

  • LeonLeon Posts: 7,620
    edited 2010-03-02 08:25
    There is the Chameleon system which combines a PIC24 with the Propeller.

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    Leon Heller
    Amateur radio callsign: G1HSM
  • navigatornavigator Posts: 10
    edited 2010-03-02 08:32
    Is it part of parallax?? if not can you let me know where to look into it??
  • LeonLeon Posts: 7,620
    edited 2010-03-02 09:30
    www.xgamestation.com/browse_products.php?category=9

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    Leon Heller
    Amateur radio callsign: G1HSM
  • MagIO2MagIO2 Posts: 2,243
    edited 2010-03-02 10:37
    Only for I/Os I would not use another uC. You can add an additional propeller for a lower price than the PIC you mentioned ... and you can use shift registers to extend the number of I/Os.
  • navigatornavigator Posts: 10
    edited 2010-03-02 10:57
    WOW, thank you so very much Leon, the Cameleon is exactly what i had in mind. Thanks for the link.

    Thank you also MagIO2. I do see the second controller as an asset. Communication between the Propeller and the PIC might be a little strange, but it seems as they (the Cameleon company) seem to have figured it out for me. The PIC24 is a bonus.
    I am already using MPLab IDE, so that should not be a problem.

    Thanks again to all. Have a great project.

    BYTE name = (NAVIGATOR);
  • Peter JakackiPeter Jakacki Posts: 10,193
    edited 2010-03-02 11:03
    Nav, many of us have used other processors with the Prop either as I/O processors or as Co-processors. For under $2 I can have a LPC111x 50Mhz 32-bit ARM chip laden with peripherals and plenty of memory etc. That's my processor of choice and it won't run out of steam either.

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    *Peter*
  • navigatornavigator Posts: 10
    edited 2010-03-04 08:28
    I've never used an ARM processor, it is cheaper than what i've ordered. I'll look into it. Is it any real trouble with two programming languages?

    I looked into the Camelleon, found it interesting, but i need a few more I/O's yet.

    Thank you for the reply Peter.

    Have a great day.

    BYTE name = (NAVIGATOR);
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