msp430 msp430g2553 using ccr0, ccr1 and timer overflow interrupts to generate a pwm signal on p1.0 and p1.6

timer.c

// using ccr0, ccr1 and timer overflow interrupts to generate a pwm signal on p1.0 and p1.6

#include <msp430.h>

#define interrupt(x) void __attribute__((interrupt (x)))

interrupt(TIMER0_A0_VECTOR) tmr_ccr0 () {
	// interrupt flag is automatically reset
	// ccr0
	P1OUT &= ~(BIT0);
}

interrupt(TIMER0_A1_VECTOR) tmr () {
	switch (TAIV) {
	case 0x02:
		// ccr1
		P1OUT &= ~(BIT6);
		TACCTL1 &= ~(CCIFG);
		break;
	case 0x0a:
		// timer overflow
		P1OUT |= BIT0 | BIT6;
		TACTL &= ~(TAIFG);
		break;
	}
}

int main() {
	WDTCTL = WDTPW + WDTHOLD;

	// configure clocks
	DCOCTL  =  CALDCO_16MHZ;
	BCSCTL1 =  CALBC1_16MHZ;

	// i/o
	P1DIR = BIT6 | BIT0;
	P1OUT = 0x00;

	// timer
	TACCR0 = 16000; 	// 1 ms
	TACCR1 = 32000;		// 2 ms

	TACCTL0 = CCIE;
	TACCTL1 = CCIE;

	TACTL = TASSEL_2 | MC_2 | TAIE;


	__enable_interrupt();
	for (;;) {}
	return 0;
}