一种高效定时器模块的设计与实现
typedef enum{
本文引用地址://m.amcfsurvey.com/article/118088.htmFEEDWATCHDOG_300MS,
INPUT_DETECT_MS,
LIN_TIMESLOT_MS,
SPEED_PULSE_ACCUMU_200MS,
ALLDR_LOCK_200MS,
ALARM_30S,
IGNITION_OFF_60S,
...
...
MAX_TIMER_NUM
}TimerId;
这样,定义数组Timer TIMER[MAX_TIMER_NUM],在初始化中,TIMER [i].timer_id=i;之后通过TIMER[timer_id]即可枚举某软件定时器节点。
定时器管理
定时器管理包括启动、运行、停止、重启和读取计时时间等功能[4],相应API函数定义如下:
void TimerStart(TimerId timer_id,ulong timeout,Bool cycle,uchar cnt_times);
void TimerReStart(TimerId timer_id);
void TimerTick(void);
void TimerStop(TimerId timer_id);
void TimerStall(TimerId timer_id);
ulong TimerGet(TimerId timer_id);
启动定时器函数如下:
#dene RTIPERIOD 2
void TimerStart(TimerId timer_id,ulong timeout,Bool cycle,uchar cnt_times)
{
TIMER[timer_id].timer_state=RUNNING;
TIMER[timer_id].duration=0;
TIMER[timer_id].timeout=timeout/RTIPERIOD;
TIMER[timer_id].cycle=cycle;
TIMER[timer_id].cnt_times=cnt_times;
TIMER[timer_id].timer_id=timer_id;
}
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