WINCE 微秒、毫秒级延时函数

  
    

   
     
   
     void
   
      delay_us(
   
     int
   
      n){ 

LARGE_INTEGER litmp; 
LONGLONG QPart1,QPart2; 

   
     double
   
      dfMinus, dfFreq, dfTim; 

   
     if
   
     (QueryPerformanceFrequency(
   
     &
   
     litmp)
   
     ==
   
     FALSE) 
 { 
 MessageBox(NULL,TEXT(
   
     "
   
     Error：QueryPerformanceFrequency
   
     "
   
     ),TEXT(
   
     "
   
     Error
   
     "
   
     ),MB_OK); 
 
   
     return
   
     ;
 } 
dfFreq 
   
     =
   
      (
   
     double
   
     )litmp.QuadPart; 
QueryPerformanceCounter(
   
     &
   
     litmp); 
QPart1 
   
     =
   
      litmp.QuadPart; 

   
     do
   
      
 { 
 QueryPerformanceCounter(
   
     &
   
     litmp); 
 QPart2
   
     =
   
     litmp.QuadPart; 
 dfMinus
   
     =
   
     (
   
     double
   
     )(QPart2
   
     -
   
     QPart1); 
 dfTim
   
     =
   
     dfMinus
   
     /
   
     dfFreq; 
 }
   
     while
   
     (dfTim 
   
     <
   
     0.000001
   
     *
   
     n); 

}

   
     //
   
     毫秒级的延时函数
   
     

   
     void
   
      delay_ms(DWORD tmp_time) 
{ 
 DWORD start; 
 DWORD time_i
   
     =
   
     0
   
     ; 
 start
   
     =
   
     GetTickCount(); 
 
   
     while
   
     (time_i
   
     <=
   
     tmp_time) 
 { 
 time_i
   
     =
   
     GetTickCount()
   
     -
   
     start; 
 } 
}


  
    

 

转自：http://blog.163.com/mg29_x/blog/static/60304826200812911148146/