common.c

void delay(unsigned int delayms) {
	// Enable interrupts.
	EI();
	// Enable the timer 0 interrupt.
	IRQ0ENH |= 0x20;

	// Set the timer.
	T0CTL1 = TCTL1(0, 0, 7, TMODE_ONE_SHOT);
	T0CTL0 = TCTL0(0);
	T0 = 1;

	T0R = 145;

	for (; delayms > 0; --delayms) {
		T0CTL1 |= 0x80;
		// HALT mode stops the CPU, reducing power use.
		// Several events can resume the CPU, including interrupts.
		asm("HALT");
	}
}

interrupt void isr_timer0() _At TIMER0 { }