7219 display driver with decimal points?

Comments

• dandreae Posts: 1,375

  2006-11-11 00:33 edited 2006-11-11 00:33

  If you type in "decimal point and MAX7219" in the Google search located on the Parallax website www.parallax.com ·it will come up with Experiment 29, which will show you how to use the decimal point.
  
  Dave
  
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  Dave Andreae
  
  Parallax Tech Support·
• Chris Savage Parallax Engineering Posts: 14,406

  2006-11-11 00:36 edited 2006-11-11 00:36

  Hello,
  ·
  ·· The code from the following project makes use of the Decimal points for non-decimal point use, but shows how easy it is to turn one on for a value and conditionally.· I hope this helps.· Take care.
  
  http://forums.parallax.com/showthread.php?p=552892
  
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  Chris Savage
  Parallax Tech Support
• Mohamed Refky Posts: 47

  2006-11-11 16:23 edited 2006-11-11 16:23

  The decimal point is set by bit D7=1
  
  Maxdisplay:
  · FOR index = 5 TO 1
  ··· SHIFTOUT DATA_n,CLK2,MSBFIRST,[noparse][[/noparse]index]
  ··· temp = dispVal DIG(index-1)
  ··· IF index <> 4 THEN· skip1
  ··· temp = temp + 128·············· 'Add decimal point to no 4 (00.000)
  skip1:
  ··· SHIFTOUT DATA_n,CLK2,MSBFIRST,[noparse][[/noparse]temp]
  ··· PULSOUT load,5
  · NEXT
  RETURN
• RottenJalapeno Posts: 27

  2006-11-11 20:51 edited 2006-11-11 20:51

  Hey, thanks for the help guys... I'll give it a shot