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???
04/29/09 08:12
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 		 #164927 - Spy on the Data & Control lines
Responding to: ???'s previous message
Giang Ho said:
We want to see whatever show on the LCD of "board A" from a remove (sic?) board

I assume you mean "remote" there?

Is there anyone have any idea about how to do that or having different idea, please?

If you really don't have any other communication options, then your microcontroller 'C' is just going to have to monitor the data & control line to LCD 'A' and, effectively, mimic the operation of the LCD.

Presumably, you already have board 'A' working - so you must have the specifications of how the LCD reacts to its data and control lines?
You "just" need to mimic that...

List of 24 messages in thread
TopicAuthorDate
How to read and redisplay from LCD databus?            01/01/70 00:00      
   Spy on the Data & Control lines            01/01/70 00:00      
      Can be hard to be fast enough            01/01/70 00:00      
   Shouldn't be a problem            01/01/70 00:00      
      some HW might be needed            01/01/70 00:00      
         Monitor the LCD databus then send via 485            01/01/70 00:00      
         I don't see a place for the 805x            01/01/70 00:00      
      Re: Shouldn't be a problem            01/01/70 00:00      
         some basic questions            01/01/70 00:00      
            Re:some basic questions            01/01/70 00:00      
               20 Meters            01/01/70 00:00      
                  Re: 20 Meters            01/01/70 00:00      
      Signal timing and command timing separate issues            01/01/70 00:00      
         Check the datasheet ...            01/01/70 00:00      
            Re: Check the datasheet ... and test on LCD of board B first            01/01/70 00:00      
               A CPLD at each end would do nicely            01/01/70 00:00      
                  Re: A CPLD at each end would do nicely            01/01/70 00:00      
                     it depends on requirements            01/01/70 00:00      
                        Watch out for assumptions about busy            01/01/70 00:00      
                           If that gets to be an issue ...            01/01/70 00:00      
                              slave timing            01/01/70 00:00      
                                 I doubt that will work.            01/01/70 00:00      
   I had done something like this in past            01/01/70 00:00      
      Re: I had done something like this in past            01/01/70 00:00      

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