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USB and serial comunications — Parallax Forums

USB and serial comunications

BitsBits Posts: 414
edited 2011-11-02 05:09 in General Discussion
Will this work? I cant breadboard it since all the parts I have are not DIP.

Using a propeller, FTDI and MAX232.
Attachment not found.

Comments

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-11-01 14:04
    Assuming positive serial data (i.e. "mark" == 1), you want an AND gate, not an OR gate.

    -Phil
  • BitsBits Posts: 414
    edited 2011-11-01 14:25
    My intent was to allow a user to use either USB or SERIAL but not at the same time. Do you think that an AND gate is still necessary?
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-11-01 14:33
    The inactive (MARK) state of the MAX232 and FTDI chips' outputs is high. So, yes, an AND gate is what you want.

    -Phil
  • BitsBits Posts: 414
    edited 2011-11-01 14:37
    Ahh thank you again Phil :)
  • sexualitesexualite Posts: 1
    edited 2011-11-02 05:09
    hope that you've come out with a solution. :)
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