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#include <ti/devices/msp432p4xx/driverlib/timer32.h>
#include <ti/devices/msp432p4xx/driverlib/interrupt.h>
#include <ti/devices/msp432p4xx/driverlib/debug.h>

void Timer32_initModule(uint32_t timer, uint32_t preScaler, uint32_t resolution,
        uint32_t mode)
{
    /* Setting up one shot or continuous mode */
    if (mode == TIMER32_PERIODIC_MODE)
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_MODE_OFS)
                    = 1;
    else if (mode == TIMER32_FREE_RUN_MODE)
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_MODE_OFS)
                    = 0;
    else
        ASSERT(false);

    /* Setting the resolution of the timer */
    if (resolution == TIMER32_16BIT)
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_SIZE_OFS)
                    = 0;
    else if (resolution == TIMER32_32BIT)
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_SIZE_OFS)
                    = 1;
    else
        ASSERT(false);

    /* Setting the PreScaler */
    ASSERT(
            resolution == TIMER32_PRESCALER_1
            || resolution == TIMER32_PRESCALER_16
            || resolution == TIMER32_PRESCALER_256);

    TIMER32_CMSIS(timer)->CONTROL = (TIMER32_CMSIS(timer)->CONTROL
            & (~TIMER32_CONTROL_PRESCALE_MASK)) | preScaler;

}

void Timer32_setCount(uint32_t timer, uint32_t count)
{
    if (!BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_SIZE_OFS)
            && (count > UINT16_MAX))
        TIMER32_CMSIS(timer)->LOAD = UINT16_MAX;
    else
        TIMER32_CMSIS(timer)->LOAD = count;
}

void Timer32_setCountInBackground(uint32_t timer, uint32_t count)
{
    if (!BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_SIZE_OFS)
            && (count > UINT16_MAX))
        TIMER32_CMSIS(timer)->BGLOAD = UINT16_MAX;
    else
        TIMER32_CMSIS(timer)->BGLOAD = count;
}

uint32_t Timer32_getValue(uint32_t timer)
{
    return TIMER32_CMSIS(timer)->VALUE;
}

void Timer32_startTimer(uint32_t timer, bool oneShot)
{
    ASSERT(timer == TIMER32_0_BASE || timer == TIMER32_1_BASE);

    if (oneShot)
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_ONESHOT_OFS)
                    = 1;
    else
        BITBAND_PERI(TIMER32_CMSIS(timer)->CONTROL, TIMER32_CONTROL_ONESHOT_OFS)
                    = 0;

    TIMER32_CMSIS(timer)->CONTROL |= TIMER32_CONTROL_ENABLE;
}

void Timer32_haltTimer(uint32_t timer)
{
    ASSERT(timer == TIMER32_0_BASE || timer == TIMER32_1_BASE);

    TIMER32_CMSIS(timer)->CONTROL &= ~TIMER32_CONTROL_ENABLE;
}

void Timer32_enableInterrupt(uint32_t timer)
{
    TIMER32_CMSIS(timer)->CONTROL |= TIMER32_CONTROL_IE;
}

void Timer32_disableInterrupt(uint32_t timer)
{
    TIMER32_CMSIS(timer)->CONTROL &= ~TIMER32_CONTROL_IE;
}

void Timer32_clearInterruptFlag(uint32_t timer)
{
    TIMER32_CMSIS(timer)->INTCLR |= 0x01;
}

uint32_t Timer32_getInterruptStatus(uint32_t timer)
{
    return TIMER32_CMSIS(timer)->MIS;
}

void Timer32_registerInterrupt(uint32_t timerInterrupt,
        void (*intHandler)(void))
{
    Interrupt_registerInterrupt(timerInterrupt, intHandler);
    Interrupt_enableInterrupt(timerInterrupt);
}

void Timer32_unregisterInterrupt(uint32_t timerInterrupt)
{
    Interrupt_disableInterrupt(timerInterrupt);
    Interrupt_unregisterInterrupt(timerInterrupt);
}