void start_buzzer(u8 cycles, u16 on_time, u16 off_time)
{
    // Store new buzzer duration while buzzer is off
    if (sBuzzer.time == 0)
    {
        sBuzzer.time = cycles;
        sBuzzer.on_time = on_time;
        sBuzzer.off_time = off_time;

        // Need to init every time, because SimpliciTI claims same timer
        // Reset TA1R, set up mode, TA1 runs from 32768Hz ACLK
        TA1CTL = TACLR | MC_1 | TASSEL__ACLK;

        // Set PWM frequency
        TA1CCR0 = BUZZER_TIMER_STEPS;

        // Enable IRQ, set output mode "toggle"
        TA1CCTL0 = OUTMOD_4;

        // Allow buzzer PWM output on P2.7
        P2SEL |= BIT7;

        // Activate Timer0_A3 periodic interrupts
        fptr_Timer0_A3_function = toggle_buzzer;
        Timer0_A3_Start(sBuzzer.on_time);

        // Preload timer advance variable
        sTimer.timer0_A3_ticks = sBuzzer.off_time;

        // Start with buzzer output on
        sBuzzer.state = BUZZER_ON_OUTPUT_ENABLED;
    }
}