304 lines
9.3 KiB
C
304 lines
9.3 KiB
C
/*
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* @brief LPC11u6x RTC chip driver
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2013
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#ifndef __RTC_11U6X_H_
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#define __RTC_11U6X_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @defgroup RTC_11U6X CHIP: LPC11u6x RTC driver
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* @ingroup CHIP_11U6X_Drivers
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* @{
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*/
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/**
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* @brief LPC11u6x RTC register block structure
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*/
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typedef struct { /*!< RTC */
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__IO uint32_t CTRL; /*!< RTC control register */
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__IO uint32_t MATCH; /*!< PRTC match (alarm) register */
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__IO uint32_t COUNT; /*!< RTC counter register */
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__IO uint32_t WAKE; /*!< RTC high-resolution/wake-up timer control register */
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} LPC_RTC_T;
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/* CTRL register defniitions */
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#define RTC_CTRL_SWRESET (1 << 0) /*!< Apply reset to RTC */
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#define RTC_CTRL_OFD (1 << 1) /*!< Oscillator fail detect status (failed bit) */
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#define RTC_CTRL_ALARM1HZ (1 << 2) /*!< RTC 1 Hz timer alarm flag status (match) bit */
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#define RTC_CTRL_WAKE1KHZ (1 << 3) /*!< RTC 1 kHz timer wake-up flag status (timeout) bit */
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#define RTC_CTRL_ALARMDPD_EN (1 << 4) /*!< RTC 1 Hz timer alarm for Deep power-down enable bit */
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#define RTC_CTRL_WAKEDPD_EN (1 << 5) /*!< RTC 1 kHz timer wake-up for Deep power-down enable bit */
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#define RTC_CTRL_RTC1KHZ_EN (1 << 6) /*!< RTC 1 kHz clock enable bit */
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#define RTC_CTRL_RTC_EN (1 << 7) /*!< RTC enable bit */
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/**
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* @brief Initialize the RTC peripheral
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* @param pRTC : RTC peripheral selected
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* @return None
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*/
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void Chip_RTC_Init(LPC_RTC_T *pRTC);
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/**
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* @brief De-initialize the RTC peripheral
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* @param pRTC : RTC peripheral selected
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* @return None
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*/
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void Chip_RTC_DeInit(LPC_RTC_T *pRTC);
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/**
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* @brief Enable RTC options
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* @param pRTC : The base address of RTC block
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* @param flags : And OR'ed value of RTC_CTRL_* definitions to enable
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* @return Nothing
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* @note You can enable multiple RTC options at once using this function
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* by OR'ing them together. It is recommended to only use the
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* RTC_CTRL_ALARMDPD_EN, RTC_CTRL_WAKEDPD_EN, RTC_CTRL_RTC1KHZ_EN, and
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* RTC_CTRL_RTC_EN flags with this function.
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*/
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STATIC INLINE void Chip_RTC_EnableOptions(LPC_RTC_T *pRTC, uint32_t flags)
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{
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pRTC->CTRL |= flags;
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}
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/**
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* @brief Disable RTC options
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* @param pRTC : The base address of RTC block
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* @param flags : And OR'ed value of RTC_CTRL_* definitions to disable
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* @return Nothing
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* @note You can enable multiple RTC options at once using this function
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* by OR'ing them together. It is recommended to only use the
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* RTC_CTRL_ALARMDPD_EN, RTC_CTRL_WAKEDPD_EN, RTC_CTRL_RTC1KHZ_EN, and
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* RTC_CTRL_RTC_EN flags with this function.
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*/
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STATIC INLINE void Chip_RTC_DisableOptions(LPC_RTC_T *pRTC, uint32_t flags)
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{
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pRTC->CTRL &= ~flags;
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}
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/**
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* @brief Reset RTC
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* @param pRTC : The base address of RTC block
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* @return Nothing
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* @note The RTC state will be returned to it's default.
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*/
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STATIC INLINE void Chip_RTC_Reset(LPC_RTC_T *pRTC)
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{
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Chip_RTC_EnableOptions(pRTC, RTC_CTRL_SWRESET);
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Chip_RTC_DisableOptions(pRTC, RTC_CTRL_SWRESET);
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}
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/**
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* @brief Enables the RTC
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* @param pRTC : The base address of RTC block
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* @return Nothing
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* @note You can also use Chip_RTC_EnableOptions() with the
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* RTC_CTRL_RTC_EN flag to enable the RTC.
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*/
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STATIC INLINE void Chip_RTC_Enable(LPC_RTC_T *pRTC)
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{
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Chip_RTC_EnableOptions(pRTC, RTC_CTRL_RTC_EN);
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}
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/**
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* @brief Disables the RTC
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* @param pRTC : The base address of RTC block
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* @return Nothing
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* @note You can also use Chip_RTC_DisableOptions() with the
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* RTC_CTRL_RTC_EN flag to enable the RTC.
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*/
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STATIC INLINE void Chip_RTC_Disable(LPC_RTC_T *pRTC)
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{
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Chip_RTC_DisableOptions(pRTC, RTC_CTRL_RTC_EN);
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}
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/**
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* @brief Enables the RTC 1KHz high resolution timer
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* @param pRTC : The base address of RTC block
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* @return Nothing
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* @note You can also use Chip_RTC_EnableOptions() with the
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* RTC_CTRL_RTC1KHZ_EN flag to enable the high resolution
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* timer.
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*/
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STATIC INLINE void Chip_RTC_Enable1KHZ(LPC_RTC_T *pRTC)
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{
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Chip_RTC_EnableOptions(pRTC, RTC_CTRL_RTC1KHZ_EN);
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}
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/**
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* @brief Disables the RTC 1KHz high resolution timer
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* @param pRTC : The base address of RTC block
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* @return Nothing
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* @note You can also use Chip_RTC_DisableOptions() with the
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* RTC_CTRL_RTC1KHZ_EN flag to disable the high resolution
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* timer.
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*/
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STATIC INLINE void Chip_RTC_Disable1KHZ(LPC_RTC_T *pRTC)
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{
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Chip_RTC_DisableOptions(pRTC, RTC_CTRL_RTC1KHZ_EN);
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}
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/**
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* @brief Enables selected RTC wakeup events
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* @param pRTC : The base address of RTC block
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* @param ints : Wakeup events to enable
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* @return Nothing
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* @note Select either one or both (OR'ed) RTC_CTRL_ALARMDPD_EN
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* and RTC_CTRL_WAKEDPD_EN values to enabled. You can also
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* use Chip_RTC_EnableOptions() with the flags to enable
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* the events.
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*/
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STATIC INLINE void Chip_RTC_EnableWakeup(LPC_RTC_T *pRTC, uint32_t ints)
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{
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Chip_RTC_EnableOptions(pRTC, ints);
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}
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/**
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* @brief Disables selected RTC wakeup events
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* @param pRTC : The base address of RTC block
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* @param ints : Wakeup events to disable
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* @return Nothing
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* @note Select either one or both (OR'ed) RTC_CTRL_ALARMDPD_EN
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* and RTC_CTRL_WAKEDPD_EN values to disabled. You can also
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* use Chip_RTC_DisableOptions() with the flags to disable
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* the events.
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*/
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STATIC INLINE void Chip_RTC_DisableWakeup(LPC_RTC_T *pRTC, uint32_t ints)
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{
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Chip_RTC_DisableOptions(pRTC, ints);
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}
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/**
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* @brief Clears latched RTC statuses
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* @param pRTC : The base address of RTC block
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* @param stsMask : OR'ed status bits to clear
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* @return Nothing
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* @note Use and OR'ed stsMask value of RTC_CTRL_OFD, RTC_CTRL_ALARM1HZ,
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* and RTC_CTRL_WAKE1KHZ to clear specific RTC states.
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*/
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STATIC INLINE uint32_t Chip_RTC_ClearStatus(LPC_RTC_T *pRTC, uint32_t stsMask)
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{
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(void) stsMask;
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return pRTC->CTRL;
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}
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/**
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* @brief Return RTC control/status register
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* @param pRTC : The base address of RTC block
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* @return The current RTC control/status register
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* @note Mask the return value with a RTC_CTRL_* definitions to determine
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* which bits are set. For example, mask the return value with
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* RTC_CTRL_ALARM1HZ to determine if the alarm interrupt is pending.
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*/
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STATIC INLINE uint32_t Chip_RTC_GetStatus(LPC_RTC_T *pRTC)
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{
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return pRTC->CTRL;
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}
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/**
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* @brief Set RTC match value for alarm status/interrupt
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* @param pRTC : The base address of RTC block
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* @param count : Alarm event time
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* @return Nothing
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*/
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STATIC INLINE void Chip_RTC_SetAlarm(LPC_RTC_T *pRTC, uint32_t count)
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{
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pRTC->MATCH = count;
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}
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/**
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* @brief Return the RTC match value used for alarm status/interrupt
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* @param pRTC : The base address of RTC block
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* @return Alarm event time
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*/
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STATIC INLINE uint32_t Chip_RTC_GetAlarm(LPC_RTC_T *pRTC)
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{
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return pRTC->MATCH;
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}
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/**
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* @brief Set RTC match count for 1 second timer count
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* @param pRTC : The base address of RTC block
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* @param count : Initial count to set
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* @return Nothing
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* @note Only write to this register when the RTC_CTRL_RTC_EN bit in
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* the CTRL Register is 0. The counter increments one second
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* after the RTC_CTRL_RTC_EN bit is set.
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*/
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STATIC INLINE void Chip_RTC_SetCount(LPC_RTC_T *pRTC, uint32_t count)
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{
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pRTC->COUNT = count;
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}
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/**
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* @brief Get current RTC 1 second timer count
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* @param pRTC : The base address of RTC block
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* @return current RTC 1 second timer count
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*/
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STATIC INLINE uint32_t Chip_RTC_GetCount(LPC_RTC_T *pRTC)
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{
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return pRTC->COUNT;
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}
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/**
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* @brief Set RTC wake count countdown value (in mS ticks)
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* @param pRTC : The base address of RTC block
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* @param count : wakeup time in milliSeconds
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* @return Nothing
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* @note A write pre-loads a start count value into the wake-up
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* timer and initializes a count-down sequence.
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*/
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STATIC INLINE void Chip_RTC_SetWake(LPC_RTC_T *pRTC, uint16_t count)
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{
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pRTC->WAKE = count;
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}
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/**
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* @brief Get RTC wake count countdown value
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* @param pRTC : The base address of RTC block
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* @return current RTC wake count countdown value (in mS)
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*/
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STATIC INLINE uint16_t Chip_RTC_GetWake(LPC_RTC_T *pRTC)
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{
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return pRTC->WAKE;
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}
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __RTC_11U6X_H_ */
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