161 lines
5.5 KiB
C
161 lines
5.5 KiB
C
/**
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* @file xmc1_rtc.c
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* @date 2016-03-09
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*
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* @cond
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*********************************************************************************************************************
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* XMClib v2.1.8 - XMC Peripheral Driver Library
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*
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* Copyright (c) 2015-2016, Infineon Technologies AG
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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 modification,are permitted provided that the
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* following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY,OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* To improve the quality of the software, users are encouraged to share modifications, enhancements or bug fixes with
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* Infineon Technologies AG dave@infineon.com).
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*********************************************************************************************************************
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*
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* Change History
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* --------------
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*
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* 2015-02-20:
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* - Initial <br>
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*
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* 2015-05-20:
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* - XMC_RTC_Init() function is modified
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* by adding RTC running condition check
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*
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* 2016-03-09:
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* - Optimize write only registers
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*
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* @endcond
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*
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*/
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/**
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*
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* @brief RTC driver for XMC microcontroller family.
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*
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*/
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/*********************************************************************************************************************
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* HEADER FILES
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*********************************************************************************************************************/
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#include <xmc_rtc.h>
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#if UC_FAMILY == XMC1
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#include <xmc_scu.h>
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/*********************************************************************************************************************
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* API IMPLEMENTATION
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*********************************************************************************************************************/
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/*
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* Initialize the RTC peripheral
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*/
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XMC_RTC_STATUS_t XMC_RTC_Init(const XMC_RTC_CONFIG_t *const config)
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{
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if (XMC_RTC_IsRunning() == false)
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{
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if (XMC_RTC_IsEnabled() == false)
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{
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XMC_RTC_Enable();
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}
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XMC_RTC_SetPrescaler(config->prescaler);
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while ((XMC_SCU_GetMirrorStatus() & (SCU_GENERAL_MIRRSTS_RTC_TIM0_Msk | SCU_GENERAL_MIRRSTS_RTC_TIM1_Msk)) != 0U)
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{
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/* check SCU_MIRRSTS to ensure that no transfer over serial interface is pending */
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}
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RTC->TIM0 = config->time.raw0;
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RTC->TIM1 = config->time.raw1;
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while ((XMC_SCU_GetMirrorStatus() & (SCU_GENERAL_MIRRSTS_RTC_ATIM0_Msk | SCU_GENERAL_MIRRSTS_RTC_ATIM1_Msk)) != 0U)
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{
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/* check SCU_MIRRSTS to ensure that no transfer over serial interface is pending */
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}
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RTC->ATIM0 = config->alarm.raw0;
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RTC->ATIM1 = config->alarm.raw1;
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}
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return XMC_RTC_STATUS_OK;
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}
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/*
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* Ungates a clock node for RTC
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*/
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void XMC_RTC_Enable(void)
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{
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XMC_SCU_CLOCK_UngatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_RTC);
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}
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/*
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* Gates a clock node for RTC
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*/
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void XMC_RTC_Disable(void)
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{
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XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_RTC);
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}
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/*
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* Suspends RTC function during CPU HALT mode
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*/
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void XMC_RTC_SetDebugMode(const XMC_RTC_DEBUG_MODE_t debug_mode)
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{
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uint32_t regval;
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regval = (RTC->CTR & (uint32_t)~RTC_CTR_SUS_Msk);
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RTC->CTR = (regval | (uint32_t)debug_mode);
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}
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/*
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* Enable RTC periodic and alarm event(s)
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*/
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void XMC_RTC_EnableEvent(const uint32_t event)
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{
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RTC->MSKSR |= event;
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}
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/*
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* Disable RTC periodic and alarm event(s)
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*/
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void XMC_RTC_DisableEvent(const uint32_t event)
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{
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RTC->MSKSR &= ~event;
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}
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/*
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* Clear RTC periodic and alarm event(s)
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*/
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void XMC_RTC_ClearEvent(const uint32_t event)
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{
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RTC->CLRSR = event;
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}
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/*
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* Checks RTC peripheral is enabled for programming to its registers
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*/
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bool XMC_RTC_IsEnabled(void)
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{
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return !XMC_SCU_CLOCK_IsPeripheralClockGated(XMC_SCU_PERIPHERAL_CLOCK_RTC);
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}
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#endif /* UC_FAMILY == XMC1 */
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