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Diffstat (limited to 'drivers_nrf/hal/nrf_rtc.h')
| -rw-r--r-- | drivers_nrf/hal/nrf_rtc.h | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/drivers_nrf/hal/nrf_rtc.h b/drivers_nrf/hal/nrf_rtc.h new file mode 100644 index 0000000..bca028f --- /dev/null +++ b/drivers_nrf/hal/nrf_rtc.h @@ -0,0 +1,343 @@ +/** + * Copyright (c) 2014 - 2017, Nordic Semiconductor ASA + * + * 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, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, 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 Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 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. + * + */ +/** + * @file + * @brief RTC HAL API. + */ + +#ifndef NRF_RTC_H +#define NRF_RTC_H + +/** + * @defgroup nrf_rtc_hal RTC HAL + * @{ + * @ingroup nrf_rtc + * @brief Hardware access layer for managing the real time counter (RTC). + */ + +#include <stdint.h> +#include <stddef.h> +#include <stdbool.h> +#include "nrf.h" +#include "nrf_assert.h" +#include "nrf_peripherals.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @brief Macro for getting the number of compare channels available + * in a given RTC instance. + */ + +#define NRF_RTC_CC_CHANNEL_COUNT(id) CONCAT_3(RTC, id, _CC_NUM) + +#define RTC_INPUT_FREQ 32768 /**< Input frequency of the RTC instance. */ + +/** + * @brief Macro for converting expected frequency to prescaler setting. + */ +#define RTC_FREQ_TO_PRESCALER(FREQ) (uint16_t)((RTC_INPUT_FREQ / (FREQ)) - 1) + +/**< Macro for wrapping values to RTC capacity. */ +#define RTC_WRAP(val) (val & RTC_COUNTER_COUNTER_Msk) + +#define RTC_CHANNEL_INT_MASK(ch) ((uint32_t)NRF_RTC_INT_COMPARE0_MASK << ch) +#define RTC_CHANNEL_EVENT_ADDR(ch) (nrf_rtc_event_t)(NRF_RTC_EVENT_COMPARE_0 + ch * sizeof(uint32_t)) +/** + * @enum nrf_rtc_task_t + * @brief RTC tasks. + */ +typedef enum +{ + /*lint -save -e30*/ + NRF_RTC_TASK_START = offsetof(NRF_RTC_Type,TASKS_START), /**< Start. */ + NRF_RTC_TASK_STOP = offsetof(NRF_RTC_Type,TASKS_STOP), /**< Stop. */ + NRF_RTC_TASK_CLEAR = offsetof(NRF_RTC_Type,TASKS_CLEAR), /**< Clear. */ + NRF_RTC_TASK_TRIGGER_OVERFLOW = offsetof(NRF_RTC_Type,TASKS_TRIGOVRFLW),/**< Trigger overflow. */ + /*lint -restore*/ +} nrf_rtc_task_t; + +/** + * @enum nrf_rtc_event_t + * @brief RTC events. + */ +typedef enum +{ + /*lint -save -e30*/ + NRF_RTC_EVENT_TICK = offsetof(NRF_RTC_Type,EVENTS_TICK), /**< Tick event. */ + NRF_RTC_EVENT_OVERFLOW = offsetof(NRF_RTC_Type,EVENTS_OVRFLW), /**< Overflow event. */ + NRF_RTC_EVENT_COMPARE_0 = offsetof(NRF_RTC_Type,EVENTS_COMPARE[0]), /**< Compare 0 event. */ + NRF_RTC_EVENT_COMPARE_1 = offsetof(NRF_RTC_Type,EVENTS_COMPARE[1]), /**< Compare 1 event. */ + NRF_RTC_EVENT_COMPARE_2 = offsetof(NRF_RTC_Type,EVENTS_COMPARE[2]), /**< Compare 2 event. */ + NRF_RTC_EVENT_COMPARE_3 = offsetof(NRF_RTC_Type,EVENTS_COMPARE[3]) /**< Compare 3 event. */ + /*lint -restore*/ +} nrf_rtc_event_t; + +/** + * @enum nrf_rtc_int_t + * @brief RTC interrupts. + */ +typedef enum +{ + NRF_RTC_INT_TICK_MASK = RTC_INTENSET_TICK_Msk, /**< RTC interrupt from tick event. */ + NRF_RTC_INT_OVERFLOW_MASK = RTC_INTENSET_OVRFLW_Msk, /**< RTC interrupt from overflow event. */ + NRF_RTC_INT_COMPARE0_MASK = RTC_INTENSET_COMPARE0_Msk, /**< RTC interrupt from compare event on channel 0. */ + NRF_RTC_INT_COMPARE1_MASK = RTC_INTENSET_COMPARE1_Msk, /**< RTC interrupt from compare event on channel 1. */ + NRF_RTC_INT_COMPARE2_MASK = RTC_INTENSET_COMPARE2_Msk, /**< RTC interrupt from compare event on channel 2. */ + NRF_RTC_INT_COMPARE3_MASK = RTC_INTENSET_COMPARE3_Msk /**< RTC interrupt from compare event on channel 3. */ +} nrf_rtc_int_t; + +/**@brief Function for setting a compare value for a channel. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] ch Channel. + * @param[in] cc_val Compare value to set. + */ +__STATIC_INLINE void nrf_rtc_cc_set(NRF_RTC_Type * p_rtc, uint32_t ch, uint32_t cc_val); + +/**@brief Function for returning the compare value for a channel. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] ch Channel. + * + * @return COMPARE[ch] value. + */ +__STATIC_INLINE uint32_t nrf_rtc_cc_get(NRF_RTC_Type * p_rtc, uint32_t ch); + +/**@brief Function for enabling interrupts. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] mask Interrupt mask to be enabled. + */ +__STATIC_INLINE void nrf_rtc_int_enable(NRF_RTC_Type * p_rtc, uint32_t mask); + +/**@brief Function for disabling interrupts. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] mask Interrupt mask to be disabled. + */ +__STATIC_INLINE void nrf_rtc_int_disable(NRF_RTC_Type * p_rtc, uint32_t mask); + +/**@brief Function for checking if interrupts are enabled. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] mask Mask of interrupt flags to check. + * + * @return Mask with enabled interrupts. + */ +__STATIC_INLINE uint32_t nrf_rtc_int_is_enabled(NRF_RTC_Type * p_rtc, uint32_t mask); + +/**@brief Function for returning the status of currently enabled interrupts. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * + * @return Value in INTEN register. + */ +__STATIC_INLINE uint32_t nrf_rtc_int_get(NRF_RTC_Type * p_rtc); + +/**@brief Function for checking if an event is pending. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] event Address of the event. + * + * @return Mask of pending events. + */ +__STATIC_INLINE uint32_t nrf_rtc_event_pending(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event); + +/**@brief Function for clearing an event. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] event Event to clear. + */ +__STATIC_INLINE void nrf_rtc_event_clear(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event); + +/**@brief Function for returning a counter value. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * + * @return Counter value. + */ +__STATIC_INLINE uint32_t nrf_rtc_counter_get(NRF_RTC_Type * p_rtc); + +/**@brief Function for setting a prescaler value. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] val Value to set the prescaler to. + */ +__STATIC_INLINE void nrf_rtc_prescaler_set(NRF_RTC_Type * p_rtc, uint32_t val); + +/**@brief Function for returning the address of an event. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] event Requested event. + * + * @return Address of the requested event register. + */ +__STATIC_INLINE uint32_t nrf_rtc_event_address_get(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event); + +/**@brief Function for returning the address of a task. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] task Requested task. + * + * @return Address of the requested task register. + */ +__STATIC_INLINE uint32_t nrf_rtc_task_address_get(NRF_RTC_Type * p_rtc, nrf_rtc_task_t task); + +/**@brief Function for starting a task. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] task Requested task. + */ +__STATIC_INLINE void nrf_rtc_task_trigger(NRF_RTC_Type * p_rtc, nrf_rtc_task_t task); + +/**@brief Function for enabling events. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] mask Mask of event flags to enable. + */ +__STATIC_INLINE void nrf_rtc_event_enable(NRF_RTC_Type * p_rtc, uint32_t mask); + +/**@brief Function for disabling an event. + * + * @param[in] p_rtc Pointer to the peripheral registers structure. + * @param[in] event Requested event. + */ +__STATIC_INLINE void nrf_rtc_event_disable(NRF_RTC_Type * p_rtc, uint32_t event); + +/** + *@} + **/ + + +#ifndef SUPPRESS_INLINE_IMPLEMENTATION + +__STATIC_INLINE void nrf_rtc_cc_set(NRF_RTC_Type * p_rtc, uint32_t ch, uint32_t cc_val) +{ + p_rtc->CC[ch] = cc_val; +} + +__STATIC_INLINE uint32_t nrf_rtc_cc_get(NRF_RTC_Type * p_rtc, uint32_t ch) +{ + return p_rtc->CC[ch]; +} + +__STATIC_INLINE void nrf_rtc_int_enable(NRF_RTC_Type * p_rtc, uint32_t mask) +{ + p_rtc->INTENSET = mask; +} + +__STATIC_INLINE void nrf_rtc_int_disable(NRF_RTC_Type * p_rtc, uint32_t mask) +{ + p_rtc->INTENCLR = mask; +} + +__STATIC_INLINE uint32_t nrf_rtc_int_is_enabled(NRF_RTC_Type * p_rtc, uint32_t mask) +{ + return (p_rtc->INTENSET & mask); +} + +__STATIC_INLINE uint32_t nrf_rtc_int_get(NRF_RTC_Type * p_rtc) +{ + return p_rtc->INTENSET; +} + +__STATIC_INLINE uint32_t nrf_rtc_event_pending(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event) +{ + return *(volatile uint32_t *)((uint8_t *)p_rtc + (uint32_t)event); +} + +__STATIC_INLINE void nrf_rtc_event_clear(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event) +{ + *((volatile uint32_t *)((uint8_t *)p_rtc + (uint32_t)event)) = 0; +#if __CORTEX_M == 0x04 + volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)p_rtc + (uint32_t)event)); + (void)dummy; +#endif +} + +__STATIC_INLINE uint32_t nrf_rtc_counter_get(NRF_RTC_Type * p_rtc) +{ + return p_rtc->COUNTER; +} + +__STATIC_INLINE void nrf_rtc_prescaler_set(NRF_RTC_Type * p_rtc, uint32_t val) +{ + ASSERT(val <= (RTC_PRESCALER_PRESCALER_Msk >> RTC_PRESCALER_PRESCALER_Pos)); + p_rtc->PRESCALER = val; +} +__STATIC_INLINE uint32_t rtc_prescaler_get(NRF_RTC_Type * p_rtc) +{ + return p_rtc->PRESCALER; +} + +__STATIC_INLINE uint32_t nrf_rtc_event_address_get(NRF_RTC_Type * p_rtc, nrf_rtc_event_t event) +{ + return (uint32_t)p_rtc + event; +} + +__STATIC_INLINE uint32_t nrf_rtc_task_address_get(NRF_RTC_Type * p_rtc, nrf_rtc_task_t task) +{ + return (uint32_t)p_rtc + task; +} + +__STATIC_INLINE void nrf_rtc_task_trigger(NRF_RTC_Type * p_rtc, nrf_rtc_task_t task) +{ + *(__IO uint32_t *)((uint32_t)p_rtc + task) = 1; +} + +__STATIC_INLINE void nrf_rtc_event_enable(NRF_RTC_Type * p_rtc, uint32_t mask) +{ + p_rtc->EVTENSET = mask; +} +__STATIC_INLINE void nrf_rtc_event_disable(NRF_RTC_Type * p_rtc, uint32_t mask) +{ + p_rtc->EVTENCLR = mask; +} +#endif + + +#ifdef __cplusplus +} +#endif + +#endif /* NRF_RTC_H */ |