因單片機中常有一些控制與延時關(guān)聯(lián)，這些操作并不需要特別高的精度，為了少敲點字，故做了這個單片機軟定時器，不足之處，歡迎指正。

timer.h

#ifndef __SOFT_TIMER_H__

#define __SOFT_TIMER_H__

#define EVENT_TYPE_ONESHOT 0

#define EVENT_TYPE_PERIODIC 1

#define TMR_POOL_SIZE 20

#define HANDLE int

typedef void (*TimerProc)(void*);

void TimerInit(void);

//HANDLE : -1 means fail,

HANDLE SetTimer(unsigned long uElapse,TimerProc pFunc,void *para,unsigned int Tmr_type);

void KillTimer(HANDLE hTmr);

void TimerServer(void); // call in main loop

void TimerSignal(void); // call it in timer isr

unsigned long TmrGetTime(void);

#endif

timer.c

1#include"timer.h"23typedefstruct_tagTimer{4unsignedintelapse;5unsignedintinterval;6TimerProcpFunc;7void*para;8unsignedcharstate;9unsignedcharevent_type;10unsignedchartimeout;11}Timer_Typedef;1213#defineTMR_STATE_FREE014#defineTMR_STATE_RUNNING11516staticTimer_Typedef_timerArray[TMR_POOL_SIZE]={0};17staticunsigned_tmr_tick=0;1819voidTimerInit(void)20{2122}2324HANDLESetTimer(unsignedlonguElapse,TimerProcpFunc,void*para,unsignedintTmr_type)25{26inti,unused_slot=-1;27for(i=0;i=0)&&(hTmrtimeout)&&(pTmr->pFunc))64{65(*(pTmr->pFunc))(pTmr->para);66pTmr->timeout=0;67}68pTmr++;69}70}7172voidTimerSignal(void)73{74inti=0;75Timer_Typedef*pTmr=_timerArray;7677++_tmr_tick;78for(i=0;istate==TMR_STATE_RUNNING)81{82if(pTmr->elapse==_tmr_tick)83{84if(pTmr->event_type==EVENT_TYPE_PERIODIC)85{86pTmr->elapse+=pTmr->interval;87}88else89{90pTmr->state=TMR_STATE_FREE;//killtimer91}92pTmr->timeout=1;93}94}95pTmr++;96}97}9899unsignedlongTmrGetTime(void)100{101return_tmr_tick;102}