aux_tdc.c

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/******************************************************************************
*  Filename:       aux_tdc.c
*  Revised:        2015-01-13 16:59:55 +0100 (Tue, 13 Jan 2015)
*  Revision:       42365
*
*  Description:    Driver for the AUX Time to Digital Converter interface.
*
*  Copyright (c) 2015, Texas Instruments Incorporated
*  All rights reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions are met:
*
*  1) Redistributions of source code must retain the above copyright notice,
*     this list of conditions and the following disclaimer.
*
*  2) Redistributions in binary form must reproduce the above copyright notice,
*     this list of conditions and the following disclaimer in the documentation
*     and/or other materials provided with the distribution.
*
*  3) Neither the name of the ORGANIZATION nor the names of its contributors may
*     be used to endorse or promote products derived from this software without
*     specific prior written permission.
*
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
*  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
*  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
*  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
*  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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*  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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*  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
*  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
*  POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/

#include <driverlib/aux_tdc.h>

//*****************************************************************************
//
// Handle support for DriverLib in ROM:
// This section will undo prototype renaming made in the header file
//
//*****************************************************************************
#if !defined(DOXYGEN)
    #undef  AUXTDCConfigSet
    #define AUXTDCConfigSet                 NOROM_AUXTDCConfigSet
    #undef  AUXTDCMeasurementDone
    #define AUXTDCMeasurementDone           NOROM_AUXTDCMeasurementDone
#endif

//*****************************************************************************
//
//
//*****************************************************************************
void
AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition,
                uint32_t ui32StopCondition)
{
    //
    // Check the arguments.
    //
    ASSERT(AUXTDCBaseValid(ui32Base));

    //
    // Make sure the AUX TDC is in the idle state before changing the
    // configuration.
    //
    while(!((HWREG(ui32Base + AUX_TDC_O_STAT) & AUX_TDC_STAT_STATE_M) ==
            AUX_TDC_STAT_STATE_IDLE))
    {
    }

    //
    // Clear previous results.
    //
    HWREG(ui32Base + AUX_TDC_O_CTL) = 0x0;

    //
    // Change the configuration.
    //
    HWREG(ui32Base + AUX_TDC_O_TRIGSRC) = ui32StartCondition | ui32StopCondition;
}

//*****************************************************************************
//
//
//*****************************************************************************
uint32_t
AUXTDCMeasurementDone(uint32_t ui32Base)
{
    uint32_t ui32Reg;
    uint32_t ui32Status;

    //
    // Check the arguments.
    //
    ASSERT(AUXTDCBaseValid(ui32Base));

    //
    // Check if the AUX TDC is done measuring.
    //
    ui32Reg = HWREG(ui32Base + AUX_TDC_O_STAT);
    if(ui32Reg & AUX_TDC_STAT_DONE)
    {
        ui32Status = AUX_TDC_DONE;
    }
    else if(ui32Reg & AUX_TDC_STAT_SAT)
    {
        ui32Status = AUX_TDC_TIMEOUT;
    }
    else
    {
        ui32Status = AUX_TDC_BUSY;
    }

    //
    // Return the status.
    //
    return (ui32Status);
}