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???
10/26/05 19:25
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 		 #102985 - RCAP2
Responding to: ???'s previous message
Like Erik said, loading TL2 and TH2 in the ISR is unnecessary when in autoreload mode...but I don't see in your initialization that you loaded the desired value into RCAP2L/H, which is where the timer gets its reload value.

Also, while you set TF2 so you would cause the first interrupt, you aren't resetting TF2 in your ISR (as was stated above by Oleg) so as soon as you leave the ISR, it's called again. You should see P1.6 toggling if you look at it with a scope, but you sure won't see an LED blinking.

Dennis

List of 27 messages in thread
TopicAuthorDate
Timer 2 in AT89S8252            01/01/70 00:00      
   most often, a '51 datasheet does not            01/01/70 00:00      
      continuing the above            01/01/70 00:00      
   Timer 2 for PWM...            01/01/70 00:00      
      one caution            01/01/70 00:00      
   PWM example code:            01/01/70 00:00      
   Time 2 problem            01/01/70 00:00      
      you are missing this one            01/01/70 00:00      
         I think I have covered that            01/01/70 00:00      
            RCAP2            01/01/70 00:00      
               Program with changes but still problem            01/01/70 00:00      
                  RCAP2 wrong            01/01/70 00:00      
                     Still no good            01/01/70 00:00      
                        So where do you expect the interrupt to            01/01/70 00:00      
                           why enable UART interrupt??            01/01/70 00:00      
                              sorry, early morning here            01/01/70 00:00      
                                 Is it still too early?            01/01/70 00:00      
                                    no and, please read the datasheet            01/01/70 00:00      
            I highlighted "must be cleared by            01/01/70 00:00      
   Has anyone used it ?            01/01/70 00:00      
      the biggest sin            01/01/70 00:00      
         Are you sure?            01/01/70 00:00      
            Jan is right            01/01/70 00:00      
               so am I            01/01/70 00:00      
            No, of course the datsheets are just nov            01/01/70 00:00      
            the third sin            01/01/70 00:00      
               Does this work on anyone's simulator?            01/01/70 00:00      

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