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103 lines
4.5 KiB
C
103 lines
4.5 KiB
C
/******************************************************************************
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* Filename: aon_rtc.c
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* Revised: 2017-06-05 12:13:49 +0200 (Mon, 05 Jun 2017)
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* Revision: 49096
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*
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* Description: Driver for the AON RTC.
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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 "aon_rtc.h"
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#include "cc26x0_cpu.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 AONRTCCurrentCompareValueGet
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#define AONRTCCurrentCompareValueGet NOROM_AONRTCCurrentCompareValueGet
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#undef AONRTCCurrent64BitValueGet
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#define AONRTCCurrent64BitValueGet NOROM_AONRTCCurrent64BitValueGet
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#endif
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//*****************************************************************************
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//
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// Get the current value of the RTC counter in a format compatible to the compare registers.
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//
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//*****************************************************************************
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uint32_t
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AONRTCCurrentCompareValueGet( void )
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{
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uint32_t ui32CurrentSec ;
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uint32_t ui32CurrentSubSec ;
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uint32_t ui32SecondSecRead ;
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// Reading SEC both before and after SUBSEC in order to detect if SEC incremented while reading SUBSEC
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// If SEC incremented, we can't be sure which SEC the SUBSEC belongs to, so repeating the sequence then.
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do {
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ui32CurrentSec = HWREG( AON_RTC_BASE + AON_RTC_O_SEC );
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ui32CurrentSubSec = HWREG( AON_RTC_BASE + AON_RTC_O_SUBSEC );
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ui32SecondSecRead = HWREG( AON_RTC_BASE + AON_RTC_O_SEC );
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} while ( ui32CurrentSec != ui32SecondSecRead );
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return (( ui32CurrentSec << 16 ) | ( ui32CurrentSubSec >> 16 ));
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}
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//*****************************************************************************
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//
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// Get the current 64-bit value of the RTC counter.
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//
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//*****************************************************************************
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uint64_t
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AONRTCCurrent64BitValueGet( void )
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{
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union {
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uint64_t returnValue ;
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uint32_t secAndSubSec[ 2 ] ;
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} currentRtc ;
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uint32_t ui32SecondSecRead ;
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// Reading SEC both before and after SUBSEC in order to detect if SEC incremented while reading SUBSEC
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// If SEC incremented, we can't be sure which SEC the SUBSEC belongs to, so repeating the sequence then.
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do {
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currentRtc.secAndSubSec[ 1 ] = HWREG( AON_RTC_BASE + AON_RTC_O_SEC );
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currentRtc.secAndSubSec[ 0 ] = HWREG( AON_RTC_BASE + AON_RTC_O_SUBSEC );
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ui32SecondSecRead = HWREG( AON_RTC_BASE + AON_RTC_O_SEC );
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} while ( currentRtc.secAndSubSec[ 1 ] != ui32SecondSecRead );
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return ( currentRtc.returnValue );
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}
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