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???
10/22/10 17:11
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 		 #179288 - Per Westermark's previous message
Responding to: ???'s previous message
Dear Per
As you suggested...
Per Westermark said:

A normal way to solve problems is to reduce them into smaller ones. Make two programs. One program holds the pins high. One program holds the pins low.


I made one pin low and other as high. And the results were as expected i.e. one led is on and other is off. When i change the order, the second one is high and the first low. It again works fine. Also i have done this by making the optimization option to 0.

But...

When i run the normal program i.e. turning on and off leds alternatively in an infinite while loop, the led do the flickering i.e. timing delay is not proper just randomly being on and off. I am not using external crystal and enabling the internal RC Oscillator while programming. Do this have anything to do with the problem. Do i need to add any code for the oscillator settings in the C file besides it is sleeted as internal RC oscillator in the start900.a51 file.

Regards


List of 49 messages in thread
TopicAuthorDate
p89lpc936 keil programming help required.            01/01/70 00:00      
   magic code?            01/01/70 00:00      
      mov 0A5H,#0FFH            01/01/70 00:00      
   a glaring difference            01/01/70 00:00      
      a glaring difference            01/01/70 00:00      
         what happens if            01/01/70 00:00      
            what happens if            01/01/70 00:00      
               BiDir or PushPull            01/01/70 00:00      
               I leave it to you            01/01/70 00:00      
                  magic code?            01/01/70 00:00      
                  I leave it to you            01/01/70 00:00      
                     1) formatted, 2)commented, 3) correct            01/01/70 00:00      
                        1) formatted, 2)commented, 3) correct            01/01/70 00:00      
                           it is STILL two different things            01/01/70 00:00      
                              Apples and Orange Juice            01/01/70 00:00      
                                 Please focus on the problem i have            01/01/70 00:00      
                                    Software delay loop in C is a no-no            01/01/70 00:00      
                                       Software delay loop in C is a no-no            01/01/70 00:00      
                                          Reduce problem into smaller problems            01/01/70 00:00      
                                             Reduce problem into smaller problems            01/01/70 00:00      
                                             Simulator vs real hardware            01/01/70 00:00      
                                             Current limits            01/01/70 00:00      
                                             Per Westermark's previous message            01/01/70 00:00      
                                                Delay speed            01/01/70 00:00      
                                                   Elaborate            01/01/70 00:00      
                                                      tried 5 for the '51 and Keil won            01/01/70 00:00      
                                    the problem you have is ...            01/01/70 00:00      
                                       the problem you have is ...            01/01/70 00:00      
                                          do you have LEDs connected to the simulator?            01/01/70 00:00      
                                          not executing on actual hardware while simulator is fine            01/01/70 00:00      
                                    Oh So Focused            01/01/70 00:00      
   Double-post            01/01/70 00:00      
   Are you using the limited version of KEIL? the for loop....            01/01/70 00:00      
      valid C            01/01/70 00:00      
         Thats the point            01/01/70 00:00      
            nope            01/01/70 00:00      
               I wouldnt trust it            01/01/70 00:00      
                  if you do not trust it ....            01/01/70 00:00      
               And if you trust it so much why doesnt it work?            01/01/70 00:00      
                  And if you trust it so much why doesnt it work?            01/01/70 00:00      
                     trust, yes, but knowledge also required            01/01/70 00:00      
                  wait call + assumptions about two-complement, ...            01/01/70 00:00      
                     The C Standard            01/01/70 00:00      
                        who is "you"?            01/01/70 00:00      
            Yes, you can!            01/01/70 00:00      
      Quite common loop design for bit operations            01/01/70 00:00      
      for( expression-1; expression-2; expression-3 ) [ed]            01/01/70 00:00      
         erratum            01/01/70 00:00      
            Corrigendum            01/01/70 00:00      

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