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112 lines
4.0 KiB
C
112 lines
4.0 KiB
C
/******************************************************************************
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* Filename: aux_tdc.c
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* Revised: 2017-04-26 18:27:45 +0200 (Wed, 26 Apr 2017)
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* Revision: 48852
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*
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* Description: Driver for the AUX Time to Digital Converter interface.
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*
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* Copyright (c) 2015 - 2017, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of the ORGANIZATION nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#include "aux_tdc.h"
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//*****************************************************************************
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//
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// Handle support for DriverLib in ROM:
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// This section will undo prototype renaming made in the header file
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//
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//*****************************************************************************
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#if !defined(DOXYGEN)
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#undef AUXTDCConfigSet
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#define AUXTDCConfigSet NOROM_AUXTDCConfigSet
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#undef AUXTDCMeasurementDone
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#define AUXTDCMeasurementDone NOROM_AUXTDCMeasurementDone
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#endif
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//*****************************************************************************
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//
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// Configure the operation of the AUX TDC
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//
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//*****************************************************************************
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void
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AUXTDCConfigSet(uint32_t ui32Base, uint32_t ui32StartCondition,
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uint32_t ui32StopCondition)
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{
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// Check the arguments.
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ASSERT(AUXTDCBaseValid(ui32Base));
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// Make sure the AUX TDC is in the idle state before changing the
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// configuration.
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while(!((HWREG(ui32Base + AUX_TDC_O_STAT) & AUX_TDC_STAT_STATE_M) ==
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AUX_TDC_STAT_STATE_IDLE))
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{
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}
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// Clear previous results.
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HWREG(ui32Base + AUX_TDC_O_CTL) = 0x0;
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// Change the configuration.
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HWREG(ui32Base + AUX_TDC_O_TRIGSRC) = ui32StartCondition | ui32StopCondition;
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}
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//*****************************************************************************
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//
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// Check if the AUX TDC is done measuring
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//
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//*****************************************************************************
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uint32_t
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AUXTDCMeasurementDone(uint32_t ui32Base)
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{
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uint32_t ui32Reg;
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uint32_t ui32Status;
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// Check the arguments.
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ASSERT(AUXTDCBaseValid(ui32Base));
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// Check if the AUX TDC is done measuring.
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ui32Reg = HWREG(ui32Base + AUX_TDC_O_STAT);
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if(ui32Reg & AUX_TDC_STAT_DONE)
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{
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ui32Status = AUX_TDC_DONE;
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}
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else if(ui32Reg & AUX_TDC_STAT_SAT)
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{
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ui32Status = AUX_TDC_TIMEOUT;
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}
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else
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{
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ui32Status = AUX_TDC_BUSY;
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}
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// Return the status.
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return (ui32Status);
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}
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