timer.c

ucos 在 arm9 芯片上的移植

#include "drv_vic.h"
#include "includes.h"
#include "timer.h"

void TMR_ms_isr(void);
void TMR_Initialize(void)
{
	//DRV_VIC_AttachISR( VECTOR_TIMER1, INT_TMR1_2, TMR_ms_isr);
    DRV_VIC_AttachISR( VECTOR_TIMER1, INT_TMR1_2, OSTickISR);
	/* %jp{僞僀儅摦嶌奐巒} */
	*Timer1Control 	= 0x20;
	*Timer1Load		= 76205;
	*Timer1BGLoad	= 76205;	  
	*Timer1Control 	= 0xa0;    
	DRV_VIC_Enable( INT_TMR1_2, TRUE);
#if 0
	T_CISR cisr;
	
	/* %jp{妱傝崬傒僒乕價僗儖乕僠儞惗惉} */
	cisr.isratr = TA_HLNG;
	cisr.exinf  = 0;
	cisr.intno  = INT_TMR1_2;
	cisr.isr    = (FP)TMR_ms_isr;
	acre_isr(&cisr);
	ena_int(INT_TMR1_2);
    
	/* %jp{僞僀儅摦嶌奐巒} */
	*Timer1Control 	= 0x66;
	*Timer1Load		= 75938;	//about 10ms
	*Timer1BGLoad	= 75938;	  
	*Timer1Control 	= 0xe6;
#endif
}

unsigned long g_msCounter = 0;

void TMR_ms_isr(void)
{
	*Timer1IntClr = 1; 
	*((volatile UW *)0x10140030) = 0x00000000;
	g_msCounter+=TIMER_STICK;
}

unsigned long SetTimeout(unsigned long ms)
{
	return g_msCounter + ms;
}
void ReSetTimeCounter()
{
	g_msCounter = 0;
}

int CheckTimeout(unsigned long timeout)
{
	if(g_msCounter> timeout)
		return 1;
	return 0;
}

void DisableTMR(void)
{
	DRV_VIC_Enable( INT_TMR1_2, FALSE);	
	*Timer1Control 	= 0x66;
}
unsigned long GetmsTimer(void)
{
	return g_msCounter;
}

void Sleep(int ms)
{
	unsigned long start_time = GetmsTimer();
	while( (start_time+ms) > GetmsTimer() );
}