timers.h

来自「WWVB receiver using AVR.」· C头文件 代码 · 共 34 行

/* $Id: timers.h,v 1.2 2005/04/16 11:52:45 simimeie Exp $
 * Functions that work with the avrs timer(s).
 * Mainly a function that allows you to get sort of a timestamp.
 */ 

#ifndef _TIMERS_H_
#define _TIMERS_H_

/* This value can be used for turning "ticks" into "seconds" */
#define TICKSPERSECOND ((uint16_t)(CPUFREQ / 16384UL))

struct tickdata {
	uint16_t seconds;
	uint16_t ticks;
};

void timers_init(void);
void gettickdata(struct tickdata * td);
/* For lower resolution (only the seconds), you can use this instead */
uint16_t getseconds(void);
/* This should only be called by the DCF module */
void timers_zero(void);

#ifdef HIGHRESTIMER
#define HIGHRESTICKSPERSECOND (CPUFREQ / 1024UL)
/* The highres timer counts 64 times as fast as the normal timer.
 * It has to be started with starthighrestimer and will implicitly be stopped
 * again if it overflows or is read with readhighrestimer. */
void starthighrestimer(void);
uint16_t readhighrestimer(void);
#endif

#endif