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Serial connection between basic stamp 1 and hyperterminal using max232 — Parallax Forums

Serial connection between basic stamp 1 and hyperterminal using max232

100IT100IT Posts: 4
edited 2008-03-28 22:39 in BASIC Stamp
Trying to connect an basic stamp 1 to a pc for serout reading. (data from ping ))) I ·used the connection as stated on page 417 of manual (nul modem type) . im using hyperterminal to readout serial data. This doesn't work. debug works (blue screen shows data)
As a test i· did the ·output·on·pin 7 from·1 to·0 using: high 7 pause 2000 low 7 pause 2000. The level changes on the output, trough the max 232. ie +/- 8V. tryed the SEROUT.bs1 from the·library. Not receiving anything in hyperterminal. Please help. regards

Chris.

·

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-27 14:08
    What baud mode are you using? Should be non-inverted (true) baud mode if you’re using a MAX232.

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    Chris Savage
    Parallax Tech Support
  • 100IT100IT Posts: 4
    edited 2008-03-27 14:32
    Yes Chris, correct. So i tested with:

    T2400 and TO2400

    That didn't work.

    I used to have a nice logic analyser but nowadays i'm a bit blind checking the output signal. confused.gif

    I've ordered a stamp2sx, its in the post. But i hoped to get the stamp1 working as i don't need the power.

    regards,
    chris.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-27 18:49
    It may be an issue in the wiring of the MAX232...These circuits require 5 capacitors...Usually .1uF or so. Do you have them all installed properly?

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    Chris Savage
    Parallax Tech Support
  • 100IT100IT Posts: 4
    edited 2008-03-27 21:21
    Yes Chris, i'm sure. I've used the max232 in several other applications. So i'm pretty confident.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-28 15:35
    Next logical issue would be HyperTerminal itself...

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    Chris Savage
    Parallax Tech Support
  • 100IT100IT Posts: 4
    edited 2008-03-28 22:39
    Got my stamp2sx in the post. So i've Exchanged the basic stamp 1 with this one and got everything working in no time.
    Hyperterminal received all input. I'll dig into the basic 1 stamp issue, when more time is available and when i've got all the right tools back. I'm sure its solvable.

    Anyway, thanks for your kind support.

    Regards,
    Chris.
    Belgium.
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