chip.c

展讯SC6600D例程

/******************************************************************************
 ** File Name:      chip.c                                                    *
 ** Author:         Xueliang.Wang                                             *
 ** DATE:           11/10/2005                                                *
 ** Copyright:      2005 Spreatrum, Incoporated. All Rights Reserved.         *
 ** Description:                                                              *
 ******************************************************************************

 ******************************************************************************
 **                        Edit History                                       *
 ** ------------------------------------------------------------------------- *
 ** DATE            NAME            DESCRIPTION                               *
 ** 11/10/2005      Xueliang.Wang   Create.                                   *
 ******************************************************************************/
#ifndef _CHIP_C
#define _CHIP_C

/**---------------------------------------------------------------------------*
 **                         Dependencies                                      *
 **---------------------------------------------------------------------------*/
#include "chip.h"
#include "arm_reg.h"
#include "sc6600d_reg.h"

/**---------------------------------------------------------------------------*
 **                         Compiler Flag                                     *
 **---------------------------------------------------------------------------*/
#ifdef __cplusplus
    extern   "C"
    {
#endif

/**---------------------------------------------------------------------------*
 **                         Global Variables                                  *
 **---------------------------------------------------------------------------*/

/**---------------------------------------------------------------------------*
 **                     Local Function Prototypes                             *
 **---------------------------------------------------------------------------*/

/**---------------------------------------------------------------------------*
 **                         Function Definitions                              *
 **---------------------------------------------------------------------------*/
/*****************************************************************************/
//  Description:    This function retrieves the number of milliseconds that 
//                  have elapsed since the system was started.
//	Global resource dependence:
//  Author:         Xueliang.Wang
//	Note:           The elapsed time is stored as a uint32 value. Therefore, 
//                  the time will wrap around to zero if the system is run 
//                  continuously for 49.7 days. 
/*****************************************************************************/
PUBLIC uint32 CHIP_GetTickCount(void)    // Number of ticks.
{
	volatile uint32	tmp_tick1;
	volatile uint32	tmp_tick2;
	
	*(volatile uint32 *)GR_GEN0 |= (GEN0_KPD | GEN0_RTC);
	
	tmp_tick1 = SYSTEM_CURRENT_CLOCK;
	tmp_tick2 = SYSTEM_CURRENT_CLOCK;
	
	while (tmp_tick1 != tmp_tick2)
	{
		tmp_tick1 = tmp_tick2;
		tmp_tick2 = SYSTEM_CURRENT_CLOCK;
	}
	
	return tmp_tick1;
	
}

/**---------------------------------------------------------------------------*
 **                         Compiler Flag                                     *
 **---------------------------------------------------------------------------*/
#ifdef __cplusplus
    }
#endif

#endif  // _CHIP_C