waitutils.c

Freescale ARM11系列CPU MX31的WINCE 5.0下的BSP

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//

#include <bsp.h>

UINT32 WdogInit(UINT32 TimeoutMSec);

// Timer already initialized to ~1 kHz (1 ms tick) in PMCPlatformInit
extern PCSP_EPIT_REG g_pEPIT;

void msWait(unsigned nMilliseconds)
{  
 
	UINT32 startCount, maxCount;
    
    if (g_pEPIT == NULL) 
    {
    	OALMSG(OAL_ERROR, (TEXT("msWait: ERROR - Timer not initialized\r\n")));
    	return;
    }  	
    
    startCount = EPIT_CNT_COUNT_MAX - INREG32(&g_pEPIT->CNT);
    maxCount = startCount + nMilliseconds;
    
    // wait for nMilliseconds number of ticks
    while( (EPIT_CNT_COUNT_MAX - INREG32(&g_pEPIT->CNT)) < maxCount);
          
}

void ResetSystem(void)
{	
    // Get uncached virtual addresses for Watchdog
    WdogInit(500);

	while(1);
    
    // Should never get to this point...
    //
}