timer.c

一个具体的项目程序

#include   "My_head.h"
/**************************************************/
#define  TIMER_SIZE   6
TIMER_EVENT   idata   Timer_s[TIMER_SIZE];
BYTE    Timer_Count=0;      //for main and other.

extern  BYTE   enble_send_count;
extern  BYTE  receive_timer;//for uart!
void  timer0_int(void) interrupt  1  using  1
{
   register BYTE  i;
   TR0 = 0;
   TH0 = 0x70;//0xB8;//0x3C; //0x40  //0x3f
   TL0 = 0x00;//0x00;//0xB0; //0x40  //0x7f
   TR0 = 1;
   /**************************************/
   if(Timer_Count)Timer_Count--;
   /**************************************/
   if(receive_timer)if(--receive_timer==0)REN=TRUE;
   if(enble_send_count)enble_send_count--;
   /**************************************/
   for(i=0;i<TIMER_SIZE;i++)
     if((Timer_s[i].event & 0x80))
      {
        if(Timer_s[i].time)Timer_s[i].time--;
        else{
		     Timer_s[i].event &= 0x7f; 
			 Timer_s[i].event |= 0x40;
			}
      }
}


/*--------------------------------------------------*/
void  Stop_Timer(BYTE evt)
{
   BYTE  i;
   for(i=0;i<TIMER_SIZE;i++)
     if(evt == (Timer_s[i].event & 0x3F))
       {
        Timer_s[i].event = NULL;
		Timer_s[i].time  = 0;
	   }
}


/*--------------------------------------------------*/
void Stop_All_Timer(void)
{
   BYTE i=TIMER_SIZE;
   while(i--)
     {
      Timer_s[i].event = NULL;
	  Timer_s[i].time  = 0;
	 }
}


/*--------------------------------------------------*/
#define  MAX_TIMER_EVENT  0x3f
bit Set_TimerEvent(BYTE  event,WORD  times_20ms)
{
   BYTE  i;
   if(event>MAX_TIMER_EVENT)return(FALSE);
   for(i=0;i<TIMER_SIZE;i++)
     if(!(Timer_s[i].event & 0xC0))
      {
        Timer_s[i].time   = times_20ms;//time*50-1;
        Timer_s[i].event  = event|0x80;
        return TRUE;
      }
   return  FALSE;
}


/*--------------------------------------------------*/
BYTE   Check_Timer_Event(void)
{
   BYTE  i;
   for(i=0;i<TIMER_SIZE;i++)
     if((Timer_s[i].event & 0x40))
      {
  	    PostMessage(TIMER_COMED_EVENT,(Timer_s[i].event & 0x3f));
        Timer_s[i].event = NULL;
	    Timer_s[i].time  = 0;
      }
   return(0);
}


/*--------------------------------------------------*/
void  Init_Timer0(void)
{
   EA    = 0;
   ET0   = 0;
   TR0   = 0;          //（定时器0运行控制位，1表开启0表关闭）
   TMOD &= 0xF0;       //（定时器T0）
   TMOD |= 0x01;       // Mode 1
   TH0  =  0x70;       // 11.0592MHZ: 50ms--3ce1 (3ce1到ffff时大概为50ms)
   TL0  =  0x00;       // 11.0592MHZ: 40MS--9C42 ,B800--20ms

   //Open_Timer0();
   ET0  =  1;          //（定时器0的中断允许位，1表示允许0表示禁止）
   TR0  =  1;          // TCON |= 0x10;ǘㄊ逼