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???
02/05/06 22:25
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 		 #109252 - No if the debounce is post delay
Responding to: ???'s previous message
Fast enough is faster than the players can detect. Unless this is for Olympic scoring. Tripping on Button Interupt will gve top performance.
If he feels the need to debounce the delay should be after the button press. There is no point in checking for false presses. there should be none in this app.

Yes THIS app could be written all in the interupts. I am not sure about the displays. Hatchi type LCD writes can be slow.

If he adds bells and whisles later, it maybe a problem then.
He can not write to the LCD in main and the interupts. Unless he adds a flag (semiphore).

Peter try it both ways. The change is not that big. To be a good coder you must code.

List of 41 messages in thread
TopicAuthorDate
Polling vs interrupts in a chess clock.            01/01/70 00:00      
   Polling            01/01/70 00:00      
      Debounce            01/01/70 00:00      
   Either            01/01/70 00:00      
      debounce?            01/01/70 00:00      
         Yes            01/01/70 00:00      
      Alternatively            01/01/70 00:00      
         but PBs update clocks asynchronously            01/01/70 00:00      
            micro time vs real time            01/01/70 00:00      
               One second is a long time in Blitz chess            01/01/70 00:00      
            Use a fast main loop            01/01/70 00:00      
               but this won't let us power-down            01/01/70 00:00      
                  Do what Ian says            01/01/70 00:00      
                     I don't understand            01/01/70 00:00      
                        set a flag in the PB ISR right?            01/01/70 00:00      
                           No pb isr as such.            01/01/70 00:00      
                              The PB INTs wake up the cpu also            01/01/70 00:00      
                                 re: The PB INTs wake up the cpu also            01/01/70 00:00      
                                    Still LCD            01/01/70 00:00      
                              Isn't PB bouncing going to be a problem?            01/01/70 00:00      
                                 No            01/01/70 00:00      
                                    OK, I get it now, thanks            01/01/70 00:00      
                                       In the timer loop            01/01/70 00:00      
                                          Is it?            01/01/70 00:00      
                                             No            01/01/70 00:00      
                                                ISR capability?            01/01/70 00:00      
                                                   Pick a way            01/01/70 00:00      
                                                   ISR reources            01/01/70 00:00      
               Debounce            01/01/70 00:00      
            Define Immediately            01/01/70 00:00      
               No if the debounce is post delay            01/01/70 00:00      
                  Granted            01/01/70 00:00      
               naah and to the question bu the OP            01/01/70 00:00      
   The smartest thing ...            01/01/70 00:00      
      Re the smartest thing            01/01/70 00:00      
         Re Re the smartest thing            01/01/70 00:00      
         as for the character LCD ...            01/01/70 00:00      
            There are several IC to do this            01/01/70 00:00      
               Perhaps it's cheaper ...            01/01/70 00:00      
                  DigiKey has them            01/01/70 00:00      
      Saving Power            01/01/70 00:00      

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