sleep.c

实用的程序代码

/*-----------------------------------------------------------------------------
//     $Date: 2002/09/16 21:19:30 $
//     $RCSfile: sleep.c,v $
//-----------------------------------------------------------------------------
//
// $xilinx_legal_disclaimer
//
//---------------------------------------------------------------------------*/

#include "sleep.h"
#include "xtime_l.h"
#include "xparameters.h"

void nanosleep(unsigned int nanoseconds)
{
  /* not implemented */
}

void usleep(unsigned int useconds)
{
  XTime tEnd, tCur;

  XTime_GetTime(&tCur);
  tEnd = tCur + ((XTime) useconds) * (XPAR_CPU_PPC405_CORE_CLOCK_FREQ_HZ / 1000000);
  do
  {
    XTime_GetTime(&tCur);
  } while (tCur < tEnd);
}

void sleep(unsigned int seconds)
{
  XTime tEnd, tCur;

  XTime_GetTime(&tCur);
  tEnd  = tCur + ((XTime) seconds) * XPAR_CPU_PPC405_CORE_CLOCK_FREQ_HZ;
  do
  {
    XTime_GetTime(&tCur);
  } while (tCur < tEnd);
}