timer.c

以前做的一个仿PLC程序

/*****************************************************************************
 *   timer.c:  Timer C file for NXP LPC17xx Family Microprocessors
 *
 *   Copyright(C) 2009, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2009.05.26  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/

#include "..\Drive\PLC_PUBLIC.H"
/*uint32 timer0_counter = 0;
uint32 timer1_counter = 0;
uint32 timer2_counter = 0;
uint32 timer3_counter = 0;*/

/******************************************************************************
** Function name:		Timer0_IRQHandler
**
** Descriptions:		Timer/Counter 0 interrupt handler
**
** parameters:			None
** Returned value:		None
** 
******************************************************************************/
void TIMER0_IRQHandler (void) 
{  
  LPC_TIM0->IR = 1;			/* clear interrupt flag */
  PLC_RUN_TIME+=10;		   //运行时间+1MS
  PLC_1MS_BIT++;
  PLC_T_COUNT();           //计时
  PLC_M_MS();
  return;
}


/******************************************************************************
** Function name:		Timer1_IRQHandler
**
** Descriptions:		Timer/Counter 1 interrupt handler
**
** parameters:			None
** Returned value:		None
** 
******************************************************************************/
void TIMER1_IRQHandler (void)  
{  
  LPC_TIM1->IR = 1;			/* clear interrupt flag */

  return;
}



/******************************************************************************

******************************************************************************/
void TIMER2_IRQHandler (void)  
{  
  LPC_TIM2->IR = 1;			
  if(Y0_H_OE==1)  //PWM
  	{if(PWM_Y0_COUNT>=PWM_Y0_CYCLE){PWM_Y0_COUNT=0;}
	 else{if(PWM_Y0_COUNT<=PWM_Y0_ON_TIMER){LPC_GPIO2->FIOCLR =Y0;}
	      else{LPC_GPIO2->FIOSET =Y0;}
	      PWM_Y0_COUNT++;}
	} 
  else if(Y0_H_OE==2) //PLSY
  	{if(LPC_GPIO2->FIOPIN&Y0){LPC_GPIO2->FIOCLR =Y0;}
	 else {LPC_GPIO2->FIOSET =Y0;D8140_1++;PLSY_Y0_COUNT--;
	    if(PLSY_Y0_COUNT==0){LPC_TIM2->TCR = 0;}
	     }
	}
  //LPC_TIM2->IR = 1;
  return;
}



/******************************************************************************

******************************************************************************/
void TIMER3_IRQHandler (void)  
{  
  LPC_TIM3->IR = 1;			
  if(Y1_H_OE==1) //PWM
  	{if(PWM_Y1_COUNT>=PWM_Y1_CYCLE){PWM_Y1_COUNT=0;}
	 else{if(PWM_Y1_COUNT<=PWM_Y1_ON_TIMER){LPC_GPIO2->FIOCLR =Y1;}
	      else{LPC_GPIO2->FIOSET =Y1;}
	      PWM_Y1_COUNT++;}
	}
  else if(Y1_H_OE==2) //PLSY
  	{if(LPC_GPIO2->FIOPIN&Y1){LPC_GPIO2->FIOCLR =Y1;}
	 else{LPC_GPIO2->FIOSET =Y1;D8142_3++;PLSY_Y1_COUNT--;
	      if(PLSY_Y1_COUNT==0){LPC_TIM3->TCR = 0;}
	     }
	}  

  //LPC_TIM3->IR = 1;	  
  return;
}

/******************************************************************************
** Function name:		enable_timer
**
** Descriptions:		Enable timer
**
** parameters:			timer number: 0 or 1
** Returned value:		None
** 
******************************************************************************/
void enable_timer( uint8_t timer_num )
{
  if ( timer_num == 0 )
  {
	LPC_TIM0->TCR = 1;
  }
  else if( timer_num == 1 )
  {
	LPC_TIM1->TCR = 1;
  }
  else if( timer_num == 2 )
  {
	LPC_TIM2->TCR = 1;
  }
  else if( timer_num == 3 )
  {
	LPC_TIM3->TCR = 1;
  }
  return;
}

/******************************************************************************
** Function name:		disable_timer
**
** Descriptions:		Disable timer
**
** parameters:			timer number: 0 or 1
** Returned value:		None
** 
******************************************************************************/
void disable_timer( uint8 timer_num )
{
  if ( timer_num == 0 )
  {
	LPC_TIM0->TCR = 0;
  }
  else if ( timer_num == 1 )
  {
	LPC_TIM1->TCR = 0;
  }
  else if ( timer_num == 2 )
  {
	LPC_TIM2->TCR = 0;
  }
  else if ( timer_num == 3 )
  {
	LPC_TIM3->TCR = 0;
  }
}

/******************************************************************************
** Function name:		init_timer
**
** Descriptions:		Initialize timer, set timer interval, reset timer,
**						install timer interrupt handler
**
** parameters:			timer number and timer interval
** Returned value:		true or false, if the interrupt handler can't be
**						installed, return false.
** 
******************************************************************************/
void init_timer ( uint8 timer_num, uint32 TimerInterval ) 
{
  
  if ( timer_num == 1 )
  {
	//timer1_counter = 0;
	LPC_TIM1->MR0 = TimerInterval;
	LPC_TIM1->MCR = 3;				/* Interrupt and Reset on MR1 */

	NVIC_EnableIRQ(TIMER1_IRQn);
  }
  else if ( timer_num == 2 )
  {
	//timer2_counter = 0;
	LPC_TIM2->MR0 = TimerInterval;
	LPC_TIM2->MCR = 3;				/* Interrupt and Reset on MR1 */

	NVIC_EnableIRQ(TIMER2_IRQn);
  }
  else if ( timer_num == 3 )
  {
	//timer3_counter = 0;
	LPC_TIM3->MR0 = TimerInterval;
	LPC_TIM3->MCR = 3;				/* Interrupt and Reset on MR1 */

	NVIC_EnableIRQ(TIMER3_IRQn);
  }
}

/******************************************************************************
**                            End Of File
******************************************************************************/