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Andy Peters
12/23/11 09:48
Read: 328 times
Tucson, Az

#185198 - re: Hardware or software
Responding to: Mahmood Elnasser's previous message
Mahmood Elnasser said:
It works great with 4 analog / digital pins of microcontroller. Actually it was perfect first time. However looking at the way Arm development board did it they used a dedicated resistive touch screen controller chip ADS7843.
Generally is it better to choose a dedicated chip for this type of job or do it easy way using 4 analog / digital pins of a microcontroller and software?

If you don't have to add a dedicated chip to the design to accomplish a task, then you save money -- BOM cost, board space, power-supply, etc.

So if the processor can manage the task without otherwise impacting anything else it does, then leave off the specialist chip.

If your processor is very busy and can't manage the new task, then you have no choice in the matter.


List of 18 messages in thread
Resistive touch screen      Mahmood Elnasser      11/29/11 01:41      
   Good for you!      Rob Klein      11/29/11 01:56      
   re: Resistive touch screen        Andy Peters      11/29/11 09:57      
      Thanks      Mahmood Elnasser      11/29/11 13:46      
         re: Thanks      Andy Peters      11/30/11 09:31      
      GND reference      Mahmood Elnasser      11/29/11 14:09      
         Hardware or software      Mahmood Elnasser      12/23/11 07:37      
            re: Hardware or software      Andy Peters      12/23/11 09:48      
               oh, you do      Erik Malund      12/23/11 11:51      
      analog in instead of open drain      Maarten Brock      11/29/11 15:16      
         re: analog in ..      Andy Peters      11/30/11 09:32      
   tough to love :)      Erik Malund      11/30/11 09:39      
   software      Mahmood Elnasser      12/11/11 10:47      
      When I did Touch Screen Stuff      Michael Karas      12/11/11 11:28      
         GUI      Mahmood Elnasser      12/11/11 11:54      
            If you have ...      Michael Karas      12/11/11 21:21      
               Article      Mahmood Elnasser      12/12/11 02:03      
   Let Chinese do that      JecksonS Ben      12/12/11 05:11      

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