Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
05/29/06 10:16
Modified:
  05/29/06 10:18
Read: times


 		 #117222 - I use SW debouncing...
Responding to: ???'s previous message
... it's in the timer, anyway, and as easy as the scanning itself; and also implemented a buffer, just like in PC...

However, it's always good to realize, that without a diode on each switch you cannot fully distinguish each key upon multiple keypress...

JW

List of 28 messages in thread
TopicAuthorDate
passive matrix keyboard readout            01/01/70 00:00      
   yep use the dallas switch debouncers            01/01/70 00:00      
      really, you can't have it both ways            01/01/70 00:00      
   Keypad            01/01/70 00:00      
      what???long weekend maybe            01/01/70 00:00      
         dedicated HW in some '51s            01/01/70 00:00      
   watch human reaction speed            01/01/70 00:00      
   derivative with interrupt on pin change            01/01/70 00:00      
      Or use a maxim 6816            01/01/70 00:00      
         I use SW debouncing...            01/01/70 00:00      
   Can reduce time spent in ISR Key Scan            01/01/70 00:00      
   Use tiny slave micro            01/01/70 00:00      
      Makes sense!            01/01/70 00:00      
         Programming the slave micro            01/01/70 00:00      
            $0            01/01/70 00:00      
               Non-zero cost            01/01/70 00:00      
                  who cares            01/01/70 00:00      
                     The folks who pay will care            01/01/70 00:00      
                        You apply what I said about apples to or            01/01/70 00:00      
                           you missed my meaning            01/01/70 00:00      
                              OK, I'll clarify            01/01/70 00:00      
            Costs? He needs to solve it anyway...            01/01/70 00:00      
               Tme is money            01/01/70 00:00      
                  contradictory            01/01/70 00:00      
         Key bounce.            01/01/70 00:00      
            use a LPC            01/01/70 00:00      
               any MCU will work            01/01/70 00:00      
                  with a LPC you can do either            01/01/70 00:00      

Back to Subject List