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???
11/15/11 19:19
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 		 #184754 - Look at code in Debugger. It will tell all.
Responding to: ???'s previous message
Lukas Valecky said:
So all local variables in main() function are also placed in the stack? But how is it possible to create 1500B local varible in 256B RAM? Does Keil place it into the XRAM or RAM and doesn't care about its overflow? In the datasheet of AT89C51ED2 it is written that the stack may not be located in the XRAM... so how does it work? Thank you very much for your answer and your advice again... ;)


The Keil tools basically convert the variables of main() into global variables much the same as you would do manually except that they try to retain the variable scoping as per the way the C code is written as to which modules can see which variables.

The variables DO NOT go on the stack at all. The stack is used pretty much only for call/return addresses, interrupt/return addresses and pushed/popped values for context save/restore.

Michael Karas


List of 39 messages in thread
TopicAuthorDate
Keil problem...            01/01/70 00:00      
   Kel support            01/01/70 00:00      
      Keil support            01/01/70 00:00      
         Reward for finding bug            01/01/70 00:00      
            been tried            01/01/70 00:00      
               public bug tracker            01/01/70 00:00      
                  It's not a KEIL-specific problem ...            01/01/70 00:00      
                     not really            01/01/70 00:00      
                        It's those "snapshots" that I meant            01/01/70 00:00      
                           Not true            01/01/70 00:00      
                              Remember, where you sit determines what you see            01/01/70 00:00      
                                 Concept            01/01/70 00:00      
                                 I do not ...            01/01/70 00:00      
                                    Comfort contra mobile phone            01/01/70 00:00      
                                       Where you sit determines what you see ...            01/01/70 00:00      
                                          You are still assuming you know what other people think/do            01/01/70 00:00      
                                             You've overlooked the most basic fact ...            01/01/70 00:00      
                                                Unuseful toy?            01/01/70 00:00      
                                                   Once again, you've missed the point ...            01/01/70 00:00      
                                                      Look for progress, instead of just looking back at history            01/01/70 00:00      
                                                         are you that lucky?            01/01/70 00:00      
                                                            Yes            01/01/70 00:00      
                                                         Consider my position            01/01/70 00:00      
      keil update            01/01/70 00:00      
         auto variables            01/01/70 00:00      
   Global Variable Initiaization            01/01/70 00:00      
   just curious            01/01/70 00:00      
      Always good to hide black-box data in structs            01/01/70 00:00      
      Initialising array inside struct            01/01/70 00:00      
         not necessarily            01/01/70 00:00      
      Library            01/01/70 00:00      
   New facts...            01/01/70 00:00      
      At the very least use static for one-time initialized locals            01/01/70 00:00      
         it works! thanks...            01/01/70 00:00      
            Look at code in Debugger. It will tell all.            01/01/70 00:00      
               It's called "Overlaying"            01/01/70 00:00      
                  Optimization            01/01/70 00:00      
      are you sure ...            01/01/70 00:00      
   Thanks...            01/01/70 00:00      

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