profile.c

S3C2443的USB 的驱动程序

/**************************************************************
 NAME: profile.c
 DESC: To measuure the USB download speed, the WDT is used.
       To measure up to large time, The WDT interrupt is used.
 HISTORY:
 MAR.25.2002:purnnamu:  
     S3C2400X profile.c is ported for S3C2410X.
 **************************************************************/

#include "System.h"


/************************* Timer ********************************/
static int intCount;

void __irq IsrWatchdog(void);

void Timer_InitEx(void)
{
	intCount=0;	
	pISR_WDT_AC97=(unsigned int)IsrWatchdog;
	ClearPending(BIT_WDT_AC97);
		rSRCPND=BIT_WDT_AC97;	
	rINTMSK&=~(BIT_WDT_AC97);
	// wdt 客 AC97 犬牢 鞘夸.
}


void Timer_StartEx(void)
{
	int divider=0;
	rWTCON=((PCLK/1000000-1)<<8)|(0<<3)|(1<<2)|(0<<0);	// 16us
	rWTDAT=0xffff;
	rWTCNT=0xffff;   

	// 1/16/(65+1),interrupt enable,reset disable,watchdog enable
	rWTCON=((PCLK/1000000-1)<<8)|(0<<3)|(1<<2)|(0<<0)|(1<<5);   
}



float Timer_StopEx(void)
{
	int count;
	rWTCON=((PCLK/1000000-1)<<8);
	rINTMSK|=BIT_WDT_AC97;// 夸扁档 犬牢...
	count=(0xffff-rWTCNT)+(intCount*0xffff);
	return ((float)count*(16e-6));
}


void __irq IsrWatchdog(void)
{
       rINTMSK|=BIT_WDT_AC97;
	ClearPending(BIT_WDT_AC97);
	rSRCPND=BIT_WDT_AC97;	
	intCount++;   	
    rINTSUBMSK&=~BIT_WDT_AC97;//夸扁档...
}