hibernate.c

基于TI公司Cortex-M3的uart超级通信开发

//! Gets the currently configured low battery detection behavior.
//!
//! Returns a value representing the currently configured low battery detection
//! behavior.  The return value will be one of the following:
//!
//! - \b HIBERNATE_LOW_BAT_DETECT - detect a low battery condition.
//! - \b HIBERNATE_LOW_BAT_ABORT - detect a low battery condition, and abort
//! hibernation if low battery is detected.
//!
//! \return Returns a value indicating the configured low battery detection.
//
//*****************************************************************************
unsigned long
HibernateLowBatGet(void)
{
    //
    // Read the low bat bits from the control register and return those bits to
    // the caller.
    //
    return(HWREG(HIB_CTL) & HIBERNATE_LOW_BAT_ABORT);
}

//*****************************************************************************
//
//! Sets the value of the real time clock (RTC) counter.
//!
//! \param ulRTCValue is the new value for the RTC.
//!
//! Sets the value of the RTC.  The RTC will count seconds if the hardware is
//! configured correctly.  The RTC must be enabled by calling
//! HibernateRTCEnable() before calling this function.
//!
//! \return None.
//
//*****************************************************************************
void
HibernateRTCSet(unsigned long ulRTCValue)
{
    //
    // Write the new RTC value to the RTC load register.
    //
    HWREG(HIB_RTCLD) = ulRTCValue;

    //
    // Add a delay here to enforce the required delay between write accesses to
    // certain Hibernation module registers.
    //
    if(CLASS_IS_FURY)
    {
        //
        // Delay a fixed time on Fury-class devices
        //
        SysCtlDelay(g_ulWriteDelay);
    }
    else
    {
        //
        // Wait for write complete to be signaled on later devices.
        //
        HibernateWriteComplete();
    }
}

//*****************************************************************************
//
//! Gets the value of the real time clock (RTC) counter.
//!
//! Gets the value of the RTC and returns it to the caller.
//!
//! \return Returns the value of the RTC.
//
//*****************************************************************************
unsigned long
HibernateRTCGet(void)
{
    //
    // Return the value of the RTC counter register to the caller.
    //
    return(HWREG(HIB_RTCC));
}

//*****************************************************************************
//
//! Sets the value of the RTC match 0 register.
//!
//! \param ulMatch is the value for the match register.
//!
//! Sets the match 0 register for the RTC.  The Hibernation module can be
//! configured to wake from hibernation, and/or generate an interrupt when the
//! value of the RTC counter is the same as the match register.
//!
//! \return None.
//
//*****************************************************************************
void
HibernateRTCMatch0Set(unsigned long ulMatch)
{
    //
    // Write the new match value to the match register.
    //
    HWREG(HIB_RTCM0) = ulMatch;

    //
    // Add a delay here to enforce the required delay between write accesses to
    // certain Hibernation module registers.
    //
    if(CLASS_IS_FURY)
    {
        //
        // Delay a fixed time on Fury-class devices
        //
        SysCtlDelay(g_ulWriteDelay);
    }
    else
    {
        //
        // Wait for write complete to be signaled on later devices.
        //
        HibernateWriteComplete();
    }
}

//*****************************************************************************
//
//! Gets the value of the RTC match 0 register.
//!
//! Gets the value of the match 0 register for the RTC.
//!
//! \return Returns the value of the match register.
//
//*****************************************************************************
unsigned long
HibernateRTCMatch0Get(void)
{
    //
    // Return the value of the match register to the caller.
    //
    return(HWREG(HIB_RTCM0));
}

//*****************************************************************************
//
//! Sets the value of the RTC match 1 register.
//!
//! \param ulMatch is the value for the match register.
//!
//! Sets the match 1 register for the RTC.  The Hibernation module can be
//! configured to wake from hibernation, and/or generate an interrupt when the
//! value of the RTC counter is the same as the match register.
//!
//! \return None.
//
//*****************************************************************************
void
HibernateRTCMatch1Set(unsigned long ulMatch)
{
    //
    // Write the new match value to the match register.
    //
    HWREG(HIB_RTCM1) = ulMatch;

    //
    // Add a delay here to enforce the required delay between write accesses to
    // certain Hibernation module registers.
    //
    if(CLASS_IS_FURY)
    {
        //
        // Delay a fixed time on Fury-class devices
        //
        SysCtlDelay(g_ulWriteDelay);
    }
    else
    {
        //
        // Wait for write complete to be signaled on later devices.
        //
        HibernateWriteComplete();
    }
}

//*****************************************************************************
//
//! Gets the value of the RTC match 1 register.
//!
//! Gets the value of the match 1 register for the RTC.
//!
//! \return Returns the value of the match register.
//
//*****************************************************************************
unsigned long
HibernateRTCMatch1Get(void)
{
    //
    // Return the value of the match register to the caller.
    //
    return(HWREG(HIB_RTCM1));
}

//*****************************************************************************
//
//! Sets the value of the RTC predivider trim register.
//!
//! \param ulTrim is the new value for the pre-divider trim register.
//!
//! Sets the value of the pre-divider trim register.  The input time source is
//! divided by the pre-divider to achieve a one-second clock rate.  Once every
//! 64 seconds, the value of the pre-divider trim register is applied to the
//! predivider to allow fine-tuning of the RTC rate, in order to make
//! corrections to the rate.  The software application can make adjustments to
//! the predivider trim register to account for variations in the accuracy of
//! the input time source.  The nominal value is 0x7FFF, and it can be adjusted
//! up or down in order to fine-tune the RTC rate.
//!
//! \return None.
//
//*****************************************************************************
void
HibernateRTCTrimSet(unsigned long ulTrim)
{
    //
    // Check the arguments.
    //
    ASSERT(ulTrim < 0x10000);

    //
    // Write the new trim value to the trim register.
    //
    HWREG(HIB_RTCT) = ulTrim;

    //
    // Add a delay here to enforce the required delay between write accesses to
    // certain Hibernation module registers.
    //
    if(CLASS_IS_FURY)
    {
        //
        // Delay a fixed time on Fury-class devices
        //
        SysCtlDelay(g_ulWriteDelay);
    }
    else
    {
        //
        // Wait for write complete to be signaled on later devices.
        //
        HibernateWriteComplete();
    }
}

//*****************************************************************************
//
//! Gets the value of the RTC predivider trim register.
//!
//! Gets the value of the pre-divider trim register.  This function can be used
//! to get the current value of the trim register prior to making an adjustment
//! by using the HibernateRTCTrimSet() function.
//!
//! \return None.
//
//*****************************************************************************
unsigned long
HibernateRTCTrimGet(void)
{
    //
    // Return the value of the trim register to the caller.
    //
    return(HWREG(HIB_RTCT));
}

//*****************************************************************************
//
//! Stores data in the non-volatile memory of the Hibernation module.
//!
//! \param pulData points to the data that the caller wants to store in the
//! memory of the Hibernation module.
//! \param ulCount is the count of 32-bit words to store.
//!
//! Stores a set of data in the Hibernation module non-volatile memory.  This
//! memory will be preserved when the power to the processor is turned off, and
//! can be used to store application state information which will be available
//! when the processor wakes.  Up to 64 32-bit words can be stored in the
//! non-volatile memory.  The data can be restored by calling the
//! HibernateDataGet() function.
//!
//! \return None.
//
//*****************************************************************************
void
HibernateDataSet(unsigned long *pulData, unsigned long ulCount)
{
    unsigned int uIdx;

    //
    // Check the arguments.
    //
    ASSERT(ulCount <= 64);
    ASSERT(pulData != 0);

    //
    // Loop through all the words to be stored, storing one at a time.
    //
    for(uIdx = 0; uIdx < ulCount; uIdx++)
    {
        //
        // Write a word to the non-volatile storage area.
        //
        HWREG(HIB_DATA + (uIdx * 4)) = pulData[uIdx];

        //
        // Add a delay between writes to the data area.
        //
        if(CLASS_IS_FURY)
        {
            //
            // Delay a fixed time on Fury-class devices
            //
            SysCtlDelay(g_ulWriteDelay);
        }
        else
        {
            //