timer1.c

本人用AVR mega32写的一个关于输出32路PWM的程序

#define   EXT_TIMER1_GLOBALS
#include "includes.h" 



/************************************************************
 Function Name:  T2Init
 Function:       Timer0 initial
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Set0p5ms(void) 
{
	TCNT1   = 0;
	OCR1A   = 63;				      /* 0.5ms*/

}
/************************************************************
 Function Name:  T2Init
 Function:       Timer0 initial
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Set2ms(void) 
{
	TCNT1   = 0;
	OCR1A   = 255;				      /* 2ms*/
	
}
/************************************************************
 Function Name:  T2Init
 Function:       Timer0 initial
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Set8p7ms(void) 
{
	TCNT1   = 0;
	OCR1A   = 1200;				      /* 8.75ms*/
	
}
/************************************************************
 Function Name:  T2Init
 Function:       Timer0 initial
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Set17p5ms(void) 
{
	TCNT1   = 0;
	OCR1A   = 2240;				      /*17.5ms*/
	
}
/************************************************************
 Function Name:  T2Init
 Function:       Timer0 initial
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Init(void) 
{
	OCR1A   = 63;				      /* 0.5ms*/
	TCNT1   = 0;
    TCCR1B  = 8;                      /*CTC模式*/
	TIMSK1 |= (1<<OCIE1A);        	  /*中断允许*/

}


/************************************************************
 Function Name:  T2Start
 Function:       Timer0 start
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Start(void)
{
    TCNT1   = 0;
	TCCR1B  |= 0x03;                  /*设置定时器的分频值为64分频并开始*/
} 
                                    

/************************************************************
 Function Name:  T2Close
 Function:       Timer0 close
 Paramenter:     None               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
void T1Close(void)
{
	TCCR1A  &= 0xF8;                  /*关闭定时器*/
} 



/************************************************************
 Function Name:  SIGNAL(TIMER0_COMPA_vect)
 Function:       Timer0 interrupt
 Paramenter:     TIMER0_COMPA_vect               
 Return value:   None                     
 Author:         Chen yuan zhen May.30.2008 
*************************************************************/
SIGNAL(TIMER1_COMPA_vect)  
{
		unsigned char static PwmCtrTimeCounter=1;

    	switch(PwmCtrTimeCounter)
		{
	    	case 1:
			{
				PwmStepCounter=0;
		    	TurnOnPwm();
				T1Set0p5ms();
		    	break;
        	}
	    	case 2:
			{
				PwmStepCounter=0;
				TrueStepCount=0;
				T1Set2ms( );
            	T0Start( );         //开始   
				break;       
        	}
        	case 3:
			{
            	T0Close( ); 
				PwmStepCounter=0;
				ClrPwmPort( );
				if(IS_AD_INPUT && (!RUN_FLAG))
				{
					AD_FLAG=1;
					T1Set17p5ms( );
					PwmCtrTimeCounter=0;
				}
				else
				{
					AD_FLAG=0;
					T1Set8p7ms( );
				}
                
				FuctionProcess();
				break;
			}
			case 4:
			{
			    PwmCtrTimeCounter=0;
				FuctionProcess();
			    break;
			}
			default:
			{
			    PwmCtrTimeCounter=0;
				break;
			}
		}
		PwmCtrTimeCounter++;
 
}