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  • Committer: dan
  • Date: 2016-04-10 17:32:35 UTC
  • Revision ID: dan-20160410173235-f8nuezes02j1xm21
Modified Schimatic to incorperate pin out for Serial 3 and freed up serial 1 (for use as interupt)

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//
 
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// common.cc
 
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//
 
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#include "common.h"
 
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#include <limits.h>
 
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unsigned long calculate_duration( unsigned long then, unsigned long now )
 
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{
 
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        return now - then;
 
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        if( now < then )
 
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                return now + ( ULONG_MAX - then );
 
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        else
 
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                return now - then;
 
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}