PWM.h

#include <stdint.h>
unsigned int value;


__irq void PWM_ISR (void)
{
	if ( PWMIR & 0x0001 )	/* If interrupt due to PWM0 */
	{
		PWMIR = 0x0001;	/* Clear PWM0 interrupt */
	}
	
	if ( PWMIR & 0x0002 )	/* If interrupt due to PWM1 */
	{
		PWMIR = 0x0002;	/* Clear PWM1 interrupt */
	}
	
	if ( PWMIR & 0x0004 )	/* If interrupt due to PWM2 */
	{
		PWMIR = 0x0004;	/* Clear PWM2 interrupt */
	}
	
	if ( PWMIR & 0x0008 )	/* If interrupt due to PWM3 */
	{
		PWMIR = 0x0008;	/* Clear PWM3 interrupt */
	}	
	VICVectAddr = 0x00000000;
}

void PWM_main(unsigned int value)
{
	value = 1;
	VPBDIV		= 0x00000001;
	PINSEL0 = PINSEL0 | 0x00000008; /* Configure P0.1 as PWM3 */
	VICVectAddr0 = (unsigned) PWM_ISR; /* PWM ISR Address */
	VICVectCntl0 = (0x00000020 | 8); /* Enable PWM IRQ slot */
	VICIntEnable = VICIntEnable | 0x00000100; /* Enable PWM interrupt */
	VICIntSelect = VICIntSelect | 0x00000000; /* PWM configured as IRQ */

// For single edge controlled PWM3
	PWMTCR = 0x02; 	/* Reset and disable counter for PWM */
	PWMPR = 0x3B;	/* Prescale value for 1usec, Pclk=30MHz*/
	PWMMR0 = 1000;	/* Time period of PWM wave, 1msec */
	PWMMR3 = value;	/* Ton of PWM wave */
	PWMMCR = 0x00000203;	/* Reset and interrupt on MR0 match, interrupt on MR3 match */
	PWMLER = 0x09;	/* Latch enable for PWM3 and PWM0 */
	PWMPCR = 0x0800;	/* Enable PWM3 and PWM0, single edge controlled PWM on PWM3 */
	PWMTCR = 0x09;	/* Enable PWM and counter */
}