sleep.c

ULTRACTR的源码

/*-----------------------------------------------------------------------------
//     $Date: 2003/10/09 23:43:01 $
//     $RCSfile: sleep.c,v $
//-----------------------------------------------------------------------------
//
//     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
//     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
//     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
//     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
//     OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS
//     IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
//     AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
//     FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY
//     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
//     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
//     REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
//     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//     FOR A PARTICULAR PURPOSE.
//     
//     (c) Copyright 2002 Xilinx, Inc.
//     All rights reserved.

//
//---------------------------------------------------------------------------*/

#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);
}