timer.c

网络服务器上实现操作系统和嵌入式协议栈的 结合

//-+---+---++-+--+-++-+++--++--+++
#include "std.h"
#include "snds.h"
#include "isr.h"
#include "timer.h"
#include "sysconf.h"
#define   MAX_LINE_BUF     250

volatile unsigned int  clk_tick0 = 0;  //  time tick for timer 0  
volatile unsigned int  clk_tick1 = 0;  //  time tick for timer 0  
volatile unsigned int  WatchDogStatus = 0;  

//  Timer0,1 can be used for system real time clock  
TIME tm0 = {0,0,0,0,0,0};
TIME tm1 = {0,0,0,0,0,0};
//-+---+---++-+--+-++-+++--++--+++
// *********************************************************************** 
//  NAME : tm_init(timer device, time periode)                             
//  FUNCTIONS : Initialize the TIMER0,1.                                   
//  EXAMPLES :                                                             
//              tm_init(TIMER_DEV0,ONE_SECOND/TICKS_PER_SECOND);           
//                Where, the TIMER_DEV0 means timer0.                      
//                           ONE_SECOND = 1000,                            
//                           TICKS_PER_SECOND = 100,                       
//                 then timer0 timer periode become to 10ms.               
// *********************************************************************** 
//这里的初始化是安装缺省的中断向量，并没有打开时钟

void tm_init(int TIMER_DEV, int t) 
{

   if(TIMER_DEV)  //  for TIMER 1  
   {
         Disable_Int(nTIMER1_INT);    
	 SysSetInterrupt(nTIMER1_INT, tm1isr);
         TDATA1 = t_data_ms(t);    //  unit is [ms]  
         TCNT1 = 0x0;
         TMOD  = TM1_TOGGLE;       //  Toggle pulse will be out to port  
         Enable_Int(nTIMER1_INT);  //  Timer interrupt enable  
   }
   else  //  for TIMER0  
   {
         Disable_Int(nTIMER0_INT);    
	 SysSetInterrupt(nTIMER0_INT, tm0isr);
         TDATA0 = t_data_ms(t);  
         TCNT0 = 0x0;
         TMOD  = TM0_TOGGLE;        
         Enable_Int(nTIMER0_INT); 
         //IOPCON = (1<<29);       //  Timer0 output(TOUT0)enable   
   }
}
// *********************************************************************** 
//  NAME : tmReset(timer device )                                          
//  FUNCTIONS : Clear and initialize the TIMER0 or TIMER1                  
//  EXAMPLES :                                                             
//              tmReset(TIMER_DEV0);                                       
//                Where, the TIMER_DEV0 means timer0.                      
// *********************************************************************** 
void tmReset(int TIMER_DEV)
{
    if(TIMER_DEV) {
              TMOD &= ~TM1_RUN;       //  Clear Timer mode register       
              TDATA1 = 0;             //  Clear Timer data register  
              TCNT1  = 0xffffffff;    //  Clear timer counter register  
    }
    else {
              TMOD &= ~TM0_RUN;       //  Clear Timer mode register       
              TDATA0 = 0;             //  Clear Timer data register  
              TCNT0  = 0xffffffff;    //  Clear timer counter register  
    }

    ClrTimeVar(TIMER_DEV); //  Initialize timer variable  
}

void ClrTimeVar(int TIMER_DEV)
{
   if(TIMER_DEV) //  for timer1  
   {
        tm1.tm_sec = 0;   
        tm1.tm_min = 0;
        tm1.tm_hour = 0;
        tm1.tm_mday = 0;
        tm1.tm_mon = 0;
        tm1.tm_year = 0;
        clk_tick1    = 0;
   } 
   else  //  for timer0  
   {
        tm0.tm_sec = 0;   
        tm0.tm_min = 0;
        tm0.tm_hour = 0;
        tm0.tm_mday = 0;
        tm0.tm_mon = 0;
        tm0.tm_year = 0;
        clk_tick0    = 0;
   }
}



// *********************************************************************** 
//  NAME : tm0isr()                                                        
//  FUNCTIONS : Timer0 interrupt service routine.                          
//  EXAMPLES :                                                             
//        SysSetInterrupt(nTIMER0_INT, tm0isr);                            
// *********************************************************************** 
void tm0isr(void)
{
    clk_tick0++;  

     if(clk_tick0 == TICKS_PER_SECOND) 
     {
         clk_tick0 = 0;
         if(tm0.tm_sec++ > 59) 
         { 
              tm0.tm_sec = 0;
              if(tm0.tm_min++ > 59) 
              {  
                  tm0.tm_min = 0;
                  if(tm0.tm_hour++ > 23) 
                  {
                      tm0.tm_hour = 0;
                      if(tm0.tm_mday++ > 30) 
                      {
                          tm0.tm_mday = 0;
                          if(tm0.tm_mon++ > 11) 
                          { 
                              tm0.tm_mon = 0; 
                              tm0.tm_year++;
                           }
                       }
                  }
              }
          }
          //  4 means digit number for LED display  
          IOPDATA = ~(1<<tm0.tm_sec%4); 
    }  
}



// *********************************************************************** 
//  NAME : tm1isr()                                                        
//  FUNCTIONS : Timer1 interrupt service routine.                          
//  EXAMPLES :                                                             
//        SysSetInterrupt(nTIMER1_INT, tm1isr);                            
// *********************************************************************** 
void tm1isr(void)
{
    clk_tick1++;  

     if(clk_tick1 == TICKS_PER_SECOND) 
     {
         clk_tick1 = 0;
         if(tm1.tm_sec++ > 59) 
         { 
              tm1.tm_sec = 0;
              if(tm1.tm_min++ > 59) 
              {  
                  tm1.tm_min = 0;
                  if(tm1.tm_hour++ > 23) 
                  {
                      tm1.tm_hour = 0;
                      if(tm1.tm_mday++ > 30) 
                      {
                          tm1.tm_mday = 0;
                          if(tm1.tm_mon++ > 11) 
                          { 
                              tm1.tm_mon = 0; 
                              tm1.tm_year++;
                           }
                       }
                  }
              }
          }
          //  4 means digit number for LED display  
          IOPDATA = ~(16<<tm1.tm_sec%4); 
    }  
}


// *********************************************************************** 
//  NAME : tmCntr(TM_PARAM *t)                                             
//  FUNCTIONS : Re-initialize the timer.                                   
//  EXAMPLES :                                                             
//              t->TIMER_Lisr = Timer1Lisr;                                
//              t->TM_CHANNEL = TIMER_DEV1;                                
//              t->TM_MODE    = TM1_TOGGLE;                                
//              t->TM_DATA    = ONE_SECOND/TIME_TICKS_PER_SECOND;          
//              t->TM_OUT_PORT = 1;  //timer output enabled                
//              tmCntr(t);                                                 
//  VARIABLES USED                                                         
//          TM_PARAM       ; TIMER parameter data structures               
// *********************************************************************** 
//-+---+---++-+--+-++-+++--++--+++
//被我改名为TimerSetup(TM_PARAM *t)
void TimerSetup(TM_PARAM *t)
{
     if(t->TM_CHANNEL) 
     {
         Disable_Int(nTIMER1_INT);    
	 SysSetInterrupt(nTIMER1_INT, t->TIMER_Lisr);
         TCNT1 = 0x0;
         TDATA1 = t->TM_DATA;
         TMOD   = t->TM_MODE;
         if(t->TM_OUT_PORT) IOPCON |= (1<<30); //  enable Timer1 out  
         Enable_Int(nTIMER1_INT); 
   
   }
   else 
   {
         Disable_Int(nTIMER0_INT);    
	 SysSetInterrupt(nTIMER0_INT, t->TIMER_Lisr);
         TCNT0 = 0x0;
         TDATA0 = t->TM_DATA;
         TMOD   = t->TM_MODE;
         if(t->TM_OUT_PORT) IOPCON |= (1<<29); //  enable Timer1 out  
         Enable_Int(nTIMER0_INT); 
   }
}