sp_timer.c

来自「凌阳公司机sunplus1002在这个芯片下」· C语言 代码 · 共 85 行

/******************************************************************************
 
 Module Name: sp_timer.c

 Description: This is a hardware  timer 

 Copyright @ 2006 Sunmedia, Inc.
 All rights reserved.
 History: Created by zhangjie on 7/8/2006
 *****************************************************************************/
#include "sp_timer.h"
#include <cyg/kernel/kapi.h>
#include <cyg/hal/plf_intr.h>
#include <cyg/io/io.h>
#include <cyg/hal/types.h>
#include <cyg/infra/diag.h>
#include "types.h"
#include "string.h"


#define TIMER0_VECTOR CYGNUM_HAL_INTERRUPT_TIMER0  
#define CLKRTC	(2<<14)
#define RPT	(1<<13)
#define GO	(1<<11)



static TIMERCALLBACK pCallback = NULL;
static cyg_interrupt int_timer;
static cyg_handle_t int_timer_hd = 0;

cyg_uint32 isr_timer(cyg_vector_t vector, cyg_addrword_t data)
{
	cyg_interrupt_mask(vector);//mask the smartcard interrrupt
	cyg_interrupt_acknowledge(vector); //notify the cpu 
	return (CYG_ISR_HANDLED|CYG_ISR_CALL_DSR);
}


void dsr_timer(cyg_vector_t vector,
				cyg_ucount32 count,
				cyg_addrword_t data) 
{
	if (pCallback)
	{
		(pCallback)();
	}
	cyg_interrupt_unmask(vector);
}

void startTimer(UINT32 timeVal)
{
	regs0->timer0_cnt = timeVal;
	regs0->timer0_ctrl = (CLKRTC|GO)&~RPT;
	cyg_interrupt_unmask(TIMER0_VECTOR);
}

void stopTimer(void)
{
	regs0->timer0_ctrl &= ~GO; 
}

void registerTimerCallback(TIMERCALLBACK pfun)
{
	pCallback = pfun;
}

void createTimer(void)
{

	if (!int_timer_hd)
	{
		cyg_interrupt_create(TIMER0_VECTOR,
					    	0,
					    	0,
					    	&isr_timer,
					    	&dsr_timer,
					    	& int_timer_hd,
					    	&int_timer);
					    	
		cyg_interrupt_attach(int_timer_hd);
	}

}