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???
03/24/07 10:49
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#135763 - Initialisation
Responding to: ???'s previous message
I have not used a 20x4 line LCD before, but in my experience with 16x2, this kind of problem is indicative of the initialisation process not being completed properly. Often the lines that are not addressable appear as black squares for each character. I would check the init sequence again.

List of 9 messages in thread
TopicAuthorDate
20x4 LCD display problem            01/01/70 00:00      
   Initializing Properly?            01/01/70 00:00      
   Initialisation            01/01/70 00:00      
   Busy line            01/01/70 00:00      
      re \'busy\'            01/01/70 00:00      
         Can't use the busy flag during initialization            01/01/70 00:00      
   The LCD Ctlr Function Mode Register            01/01/70 00:00      
   solution            01/01/70 00:00      
      Excellent!            01/01/70 00:00      

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