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???
06/16/09 13:55
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 		 #166144 - oh boy what a load who wil have 10 minutes for this
Responding to: ???'s previous message
1. He has to calculate the TH and TL according to his F_CPU
2. He has to have a timer ISR() and IRQs enabled
3. He can then read the current time, add his delay, and poll for this time to be reached. Taking account of overflows, missing ticks and atomicity of reads etc.
1) in your misapplied compiler 'example' the delay loop must be calculated as well
2) a bits and 4 lines of code
3) no atomiticty issue use a char, if a char is not enough then a counter in the non IST that is decremented when the ISR time flags 'done'

Erik


List of 30 messages in thread
TopicAuthorDate
s/w delay function            01/01/70 00:00      
   Software loops can be optimized away            01/01/70 00:00      
   lacks side-effects            01/01/70 00:00      
      First time with LINT?            01/01/70 00:00      
   lacks side-effects            01/01/70 00:00      
      That does not mean it is an error.            01/01/70 00:00      
      It also blocks            01/01/70 00:00      
   How to post legible source code            01/01/70 00:00      
   DELAY_0.1.ZIP Useful?            01/01/70 00:00      
      That doesn't help, and it won't work anyhow!            01/01/70 00:00      
         I stand by it.            01/01/70 00:00      
            Yes a delay function is useful            01/01/70 00:00      
               wrong !!!!            01/01/70 00:00      
               No, that's precisely where you're wrong            01/01/70 00:00      
            How can you say that?            01/01/70 00:00      
               I think you should read Murray's comments            01/01/70 00:00      
                  I have seen ...            01/01/70 00:00      
                     Timers usable without start/stop too            01/01/70 00:00      
                        free-running counter/timer            01/01/70 00:00      
                           Unsigned integers            01/01/70 00:00      
                              re: unsigned            01/01/70 00:00      
                                 Try unsigned subtraction with borrow            01/01/70 00:00      
                                 bug in second (improved!?) code block            01/01/70 00:00      
   Delay Loops in 'C'..!!! NO            01/01/70 00:00      
      Go on. Suggest a SIMPLE alternative            01/01/70 00:00      
         My Methods            01/01/70 00:00      
            So he has a long list of constraints            01/01/70 00:00      
               oh boy what a load who wil have 10 minutes for this            01/01/70 00:00      
                  Ok. I was being naughty.            01/01/70 00:00      
                     you forget the obvious ...            01/01/70 00:00      

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