pulse.c

基于DSP2407产生带死区的6个PWM脉冲的源代码！

/**********************************************************************
File   Name: Pulse.c
Discription: Pulse for thyristor. The zero-crossing signal of power
             is inputed from the capture of 2407, which generate the
             pulse and control its phase.
Copy  Right: Guoguo
**********************************************************************/

/*include register definition of 2407*/
#include	"Reg_2407_C.h"
/*include varable and I/O address definition of 2407*/
#include	"Pulse.h"

main()
{
	CPU_Init();
	EV_Init();
	IOport_Init();
	
	asm(" CLRC INTM ");
	
	/*i = 0;/*tt*/
	/**T1CON |= 0x0040;/*tt*/
	*T2CON |= 0x0040;	/* Enable T2 */

	while(1)
	{
		/*------------------------------------------------------------------------*/
		/* Pulse generation. P1 is started from the zero-crossing of Uca.	      */
		/* Pulse width is 90 degree. Order: P1-P2-P3-P4-P5-P6-P1         	      */
		/*          ___________     ___________     ___________     ___           */
		/*         |_____1_____|___|_____3_____|___|_____5_____|___|_1_           */
		/*          ___     ___________     ___________     ___________           */
		/*         |_6_|___|_____2_____|___|_____4_____|___|_____6_____|          */
		/*         |   |   |   |   |   |   |   |   |   |   |   |   |   |          */
		/*         0  30  60  90  120 150 180 210 240 270 300 330 360  30         */
		/*                                                                        */
		/* 0 is the zero-crossing of Uca. 30 degree: i=125                        */
		/*------------------------------------------------------------------------*/
		switch(i)
		{
			case 0:	   {*PADATDIR=0x0C040;	*PBDATDIR=0x0F08;	break;}
			case 125:  {*PADATDIR=0x0C040;	*PBDATDIR=0x0F00;	break;}
			case 250:  {*PADATDIR=0x0C0C0;	*PBDATDIR=0x0F00;	break;}
			case 375:  {*PADATDIR=0x0C080;	*PBDATDIR=0x0F00;	break;}
			case 500:  {*PADATDIR=0x0C080;	*PBDATDIR=0x0F01;	break;}
			case 625:  {*PADATDIR=0x0C000;	*PBDATDIR=0x0F01;	break;}
			case 750:  {*PADATDIR=0x0C000;	*PBDATDIR=0x0F03;	break;}
            case 875:  {*PADATDIR=0x0C000;	*PBDATDIR=0x0F02;	break;}
            case 1000: {*PADATDIR=0x0C000;	*PBDATDIR=0x0F06;	break;}
            case 1125: {*PADATDIR=0x0C000;	*PBDATDIR=0x0F04;	break;}
            case 1250: {*PADATDIR=0x0C000;	*PBDATDIR=0x0F0C;	break;}
            case 1375: {*PADATDIR=0x0C000;	*PBDATDIR=0x0F08;	break;}
            default:   {break;}
    	}
    }
}

interrupt void cap_isr(void)
{
	unsigned int EVAIFRC_temp;
	
	EVAIFRC_temp = *EVAIFRC;
	
	if(!(EVAIFRC_temp & 0x0004))		/* CAP3 interrupt-go down; else return */
	{
		asm(" CLRC INTM ");
    	return;
    }
    
    i = 0;
		
	*EVAIFRC = *EVAIFRC|0x0004;
	
    asm(" CLRC INTM ");
    
    *T1CON |= 0x0040;
	*T1CNT = 0x0000;
	*T2CNT = 0x0000;
		
    return;
}

interrupt void T1P_isr(void)     /* T1 period interrupt: 40/3us */
{
	int flag;
	flag =  *EVAIFRA;
	if(!(flag & 0x0080))
	{
		asm(" CLRC INTM ");
		return;
	}
	
	*EVAIFRA = *EVAIFRA|0x0080;
	
	i++;
	/*if(i>=1500)	i=0;/*tt*/   
    	
	asm(" CLRC INTM ");
	
	return;
}

interrupt void Phantom(void)
{
	asm(" CLRC INTM ");
	return;
}