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• #1375 papaja-xbox tag

  Új Válasz 2011-06-29 08:49:24 #1375

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  papaja-xbox

  tag

  Üdv lenne egy olyan kérdésem hogy szeretnék építeni egy robotott az elektronika megvan csak a program hiányzik . Adtak egy példált hozzá de nem akar lefutni mi a progbléma? A pdf tartalmát kimásoltam (angol)

  A real-world example
  Francis Rogers of Sun City West, Arizona wrote me to describe an application he’d like
  to build with the Stamp. He has a PC with barcode software that can read membership
  cards for his S.C.W. Metals Club. The barcode software generates a code through the PC
  serial port when it’s presented with a valid card. Mr. Rogers would like the Stamp to read
  this code and energize a relay to unlatch a door.
  This fits perfectly with the theme of this month’s column. Figure 6.3 is the schematic.
  I’ve made some assumptions about Mr. Rogers’ barcode software: that it can be set to
  output at 2400 baud, and that all valid cards output some common code for the Stamp to
  recognize.
  Thanks to the serial-input (Serin) command’s built-in “qualifier” feature, the entire
  program takes just a few lines of Stamp code:

  loop:
  low 7 ' Pin 7 low to latch door (relay open)
  serin 0,N2400,("OK") ' Watch serial input until "OK" rec'd.
  high 7 ' Pin 7 high to unlatch door (relay closed).
  pause 5000 ' Wait 5 seconds. Latch door and resume
  goto loop ' Watching serial input.

  Of course, Mr. Rogers will have to substitute the actual password for “OK” in the
  program above.
  That’s it for this month. Next time, we’ll look at a nifty IC that lets the Stamp transmit
  and receive DTMF tones (telephone touch tones). In addition to obvious telephone
  applications, DTMF can be used as a form of low-speed, high-reliability data transfer.
  Stay tuned!

  The Nuts and Volts of BASIC Stamps (Volume 1) • Page 57

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