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Diffstat (limited to 'drivers_nrf/hal/nrf_wdt.h')
| -rw-r--r-- | drivers_nrf/hal/nrf_wdt.h | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/drivers_nrf/hal/nrf_wdt.h b/drivers_nrf/hal/nrf_wdt.h new file mode 100644 index 0000000..d497fc2 --- /dev/null +++ b/drivers_nrf/hal/nrf_wdt.h @@ -0,0 +1,339 @@ +/** + * Copyright (c) 2015 - 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. + * + */ +/** + * @defgroup nrf_wdt_hal WDT HAL + * @{ + * @ingroup nrf_wdt + * + * @brief Hardware access layer for accessing the watchdog timer (WDT) peripheral. + */ + +#ifndef NRF_WDT_H__ +#define NRF_WDT_H__ + +#include <stddef.h> +#include <stdbool.h> +#include <stdint.h> + +#include "nrf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define NRF_WDT_CHANNEL_NUMBER 0x8UL +#define NRF_WDT_RR_VALUE 0x6E524635UL /* Fixed value, shouldn't be modified.*/ + +#define NRF_WDT_TASK_SET 1UL +#define NRF_WDT_EVENT_CLEAR 0UL + +/** + * @enum nrf_wdt_task_t + * @brief WDT tasks. + */ +typedef enum +{ + /*lint -save -e30 -esym(628,__INTADDR__)*/ + NRF_WDT_TASK_START = offsetof(NRF_WDT_Type, TASKS_START), /**< Task for starting WDT. */ + /*lint -restore*/ +} nrf_wdt_task_t; + +/** + * @enum nrf_wdt_event_t + * @brief WDT events. + */ +typedef enum +{ + /*lint -save -e30*/ + NRF_WDT_EVENT_TIMEOUT = offsetof(NRF_WDT_Type, EVENTS_TIMEOUT), /**< Event from WDT time-out. */ + /*lint -restore*/ +} nrf_wdt_event_t; + +/** + * @enum nrf_wdt_behaviour_t + * @brief WDT behavior in CPU SLEEP or HALT mode. + */ +typedef enum +{ + NRF_WDT_BEHAVIOUR_RUN_SLEEP = WDT_CONFIG_SLEEP_Msk, /**< WDT will run when CPU is in SLEEP mode. */ + NRF_WDT_BEHAVIOUR_RUN_HALT = WDT_CONFIG_HALT_Msk, /**< WDT will run when CPU is in HALT mode. */ + NRF_WDT_BEHAVIOUR_RUN_SLEEP_HALT = WDT_CONFIG_SLEEP_Msk | WDT_CONFIG_HALT_Msk, /**< WDT will run when CPU is in SLEEP or HALT mode. */ + NRF_WDT_BEHAVIOUR_PAUSE_SLEEP_HALT = 0, /**< WDT will be paused when CPU is in SLEEP or HALT mode. */ +} nrf_wdt_behaviour_t; + +/** + * @enum nrf_wdt_rr_register_t + * @brief WDT reload request registers. + */ +typedef enum +{ + NRF_WDT_RR0 = 0, /**< Reload request register 0. */ + NRF_WDT_RR1, /**< Reload request register 1. */ + NRF_WDT_RR2, /**< Reload request register 2. */ + NRF_WDT_RR3, /**< Reload request register 3. */ + NRF_WDT_RR4, /**< Reload request register 4. */ + NRF_WDT_RR5, /**< Reload request register 5. */ + NRF_WDT_RR6, /**< Reload request register 6. */ + NRF_WDT_RR7 /**< Reload request register 7. */ +} nrf_wdt_rr_register_t; + +/** + * @enum nrf_wdt_int_mask_t + * @brief WDT interrupts. + */ +typedef enum +{ + NRF_WDT_INT_TIMEOUT_MASK = WDT_INTENSET_TIMEOUT_Msk, /**< WDT interrupt from time-out event. */ +} nrf_wdt_int_mask_t; + +/** + * @brief Function for configuring the watchdog behavior when the CPU is sleeping or halted. + * + * @param behaviour Watchdog behavior when CPU is in SLEEP or HALT mode. + */ +__STATIC_INLINE void nrf_wdt_behaviour_set(nrf_wdt_behaviour_t behaviour) +{ + NRF_WDT->CONFIG = behaviour; +} + + +/** + * @brief Function for starting the watchdog. + * + * @param[in] task Task. + */ +__STATIC_INLINE void nrf_wdt_task_trigger(nrf_wdt_task_t task) +{ + *((volatile uint32_t *)((uint8_t *)NRF_WDT + task)) = NRF_WDT_TASK_SET; +} + + +/** + * @brief Function for clearing the WDT event. + * + * @param[in] event Event. + */ +__STATIC_INLINE void nrf_wdt_event_clear(nrf_wdt_event_t event) +{ + *((volatile uint32_t *)((uint8_t *)NRF_WDT + (uint32_t)event)) = NRF_WDT_EVENT_CLEAR; +#if __CORTEX_M == 0x04 + volatile uint32_t dummy = *((volatile uint32_t *)((uint8_t *)NRF_WDT + (uint32_t)event)); + (void)dummy; +#endif +} + + +/** + * @brief Function for retrieving the state of the WDT event. + * + * @param[in] event Event. + * + * @retval true If the event is set. + * @retval false If the event is not set. + */ +__STATIC_INLINE bool nrf_wdt_event_check(nrf_wdt_event_t event) +{ + return (bool)*((volatile uint32_t *)((uint8_t *)NRF_WDT + event)); +} + + +/** + * @brief Function for enabling a specific interrupt. + * + * @param[in] int_mask Interrupt. + */ +__STATIC_INLINE void nrf_wdt_int_enable(uint32_t int_mask) +{ + NRF_WDT->INTENSET = int_mask; +} + + +/** + * @brief Function for retrieving the state of given interrupt. + * + * @param[in] int_mask Interrupt. + * + * @retval true Interrupt is enabled. + * @retval false Interrupt is not enabled. + */ +__STATIC_INLINE bool nrf_wdt_int_enable_check(uint32_t int_mask) +{ + return (bool)(NRF_WDT->INTENSET & int_mask); +} + + +/** + * @brief Function for disabling a specific interrupt. + * + * @param[in] int_mask Interrupt. + */ +__STATIC_INLINE void nrf_wdt_int_disable(uint32_t int_mask) +{ + NRF_WDT->INTENCLR = int_mask; +} + + +/** + * @brief Function for returning the address of a specific WDT task register. + * + * @param[in] task Task. + */ +__STATIC_INLINE uint32_t nrf_wdt_task_address_get(nrf_wdt_task_t task) +{ + return ((uint32_t)NRF_WDT + task); +} + + +/** + * @brief Function for returning the address of a specific WDT event register. + * + * @param[in] event Event. + * + * @retval address of requested event register + */ +__STATIC_INLINE uint32_t nrf_wdt_event_address_get(nrf_wdt_event_t event) +{ + return ((uint32_t)NRF_WDT + event); +} + + +/** + * @brief Function for retrieving the watchdog status. + * + * @retval true If the watchdog is started. + * @retval false If the watchdog is not started. + */ +__STATIC_INLINE bool nrf_wdt_started(void) +{ + return (bool)(NRF_WDT->RUNSTATUS); +} + + +/** + * @brief Function for retrieving the watchdog reload request status. + * + * @param[in] rr_register Reload request register to check. + * + * @retval true If a reload request is running. + * @retval false If no reload request is running. + */ +__STATIC_INLINE bool nrf_wdt_request_status(nrf_wdt_rr_register_t rr_register) +{ + return (bool)(((NRF_WDT->REQSTATUS) >> rr_register) & 0x1UL); +} + + +/** + * @brief Function for setting the watchdog reload value. + * + * @param[in] reload_value Watchdog counter initial value. + */ +__STATIC_INLINE void nrf_wdt_reload_value_set(uint32_t reload_value) +{ + NRF_WDT->CRV = reload_value; +} + + +/** + * @brief Function for retrieving the watchdog reload value. + * + * @retval Reload value. + */ +__STATIC_INLINE uint32_t nrf_wdt_reload_value_get(void) +{ + return (uint32_t)NRF_WDT->CRV; +} + + +/** + * @brief Function for enabling a specific reload request register. + * + * @param[in] rr_register Reload request register to enable. + */ +__STATIC_INLINE void nrf_wdt_reload_request_enable(nrf_wdt_rr_register_t rr_register) +{ + NRF_WDT->RREN |= 0x1UL << rr_register; +} + + +/** + * @brief Function for disabling a specific reload request register. + * + * @param[in] rr_register Reload request register to disable. + */ +__STATIC_INLINE void nrf_wdt_reload_request_disable(nrf_wdt_rr_register_t rr_register) +{ + NRF_WDT->RREN &= ~(0x1UL << rr_register); +} + + +/** + * @brief Function for retrieving the status of a specific reload request register. + * + * @param[in] rr_register Reload request register to check. + * + * @retval true If the reload request register is enabled. + * @retval false If the reload request register is not enabled. + */ +__STATIC_INLINE bool nrf_wdt_reload_request_is_enabled(nrf_wdt_rr_register_t rr_register) +{ + return (bool)(NRF_WDT->RREN & (0x1UL << rr_register)); +} + + +/** + * @brief Function for setting a specific reload request register. + * + * @param[in] rr_register Reload request register to set. + */ +__STATIC_INLINE void nrf_wdt_reload_request_set(nrf_wdt_rr_register_t rr_register) +{ + NRF_WDT->RR[rr_register] = NRF_WDT_RR_VALUE; +} + + + +#ifdef __cplusplus +} +#endif + +#endif + +/** @} */ |