192 lines
6.3 KiB
C
192 lines
6.3 KiB
C
/**
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* Copyright (c) 2015 - 2020, Nordic Semiconductor ASA
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*
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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,
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* 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, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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 SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(SIMPLE_TIMER)
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#include "app_simple_timer.h"
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#include "nrf.h"
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#include "app_util_platform.h"
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#include "app_error.h"
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#include "nrf_timer.h"
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#include "nrf_drv_timer.h"
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/**@brief States of simple timer state machine.
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*/
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typedef enum
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{
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SIMPLE_TIMER_STATE_IDLE = 0,
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SIMPLE_TIMER_STATE_INITIALIZED,
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SIMPLE_TIMER_STATE_STOPPED,
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SIMPLE_TIMER_STATE_STARTED
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}simple_timer_states_t;
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static app_simple_timer_mode_t m_mode; /**< Registered timer mode. */
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static app_simple_timer_timeout_handler_t m_timeout_handler = NULL; /**< Registered time-out handler. */
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static void * mp_timeout_handler_context = NULL; /**< Registered time-out handler context. */
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static simple_timer_states_t m_simple_timer_state = SIMPLE_TIMER_STATE_IDLE; /**< State machine state. */
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const nrf_drv_timer_t SIMPLE_TIMER = NRF_DRV_TIMER_INSTANCE(SIMPLE_TIMER_CONFIG_INSTANCE);
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/**
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* @brief Handler for timer events.
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*/
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static void app_simple_timer_event_handler(nrf_timer_event_t event_type, void * p_context)
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{
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switch (event_type)
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{
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case NRF_TIMER_EVENT_COMPARE0:
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if (m_mode == APP_SIMPLE_TIMER_MODE_SINGLE_SHOT)
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{
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m_simple_timer_state = SIMPLE_TIMER_STATE_STOPPED;
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}
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//@note: No NULL check required as performed in timer_start(...).
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m_timeout_handler(mp_timeout_handler_context);
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break;
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default:
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//Do nothing.
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break;
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}
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}
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uint32_t app_simple_timer_init(void)
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{
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uint32_t err_code = NRF_SUCCESS;
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nrf_drv_timer_config_t t_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
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t_cfg.mode = NRF_TIMER_MODE_TIMER;
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t_cfg.bit_width = NRF_TIMER_BIT_WIDTH_16;
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t_cfg.frequency = (nrf_timer_frequency_t)SIMPLE_TIMER_CONFIG_FREQUENCY;
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err_code = nrf_drv_timer_init(&SIMPLE_TIMER, &t_cfg, app_simple_timer_event_handler);
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if (NRF_SUCCESS == err_code)
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{
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m_simple_timer_state = SIMPLE_TIMER_STATE_INITIALIZED;
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}
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return err_code;
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}
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uint32_t app_simple_timer_start(app_simple_timer_mode_t mode,
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app_simple_timer_timeout_handler_t timeout_handler,
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uint16_t timeout_ticks,
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void * p_context)
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{
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uint32_t err_code = NRF_SUCCESS;
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nrf_timer_short_mask_t timer_short;
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VERIFY_PARAM_NOT_NULL(timeout_handler);
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if (APP_SIMPLE_TIMER_MODE_REPEATED == mode)
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{
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timer_short = NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK;
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}
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else if (APP_SIMPLE_TIMER_MODE_SINGLE_SHOT == mode)
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{
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timer_short = NRF_TIMER_SHORT_COMPARE0_STOP_MASK;
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}
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else
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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if (SIMPLE_TIMER_STATE_IDLE == m_simple_timer_state)
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{
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return NRF_ERROR_INVALID_STATE;
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}
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if (SIMPLE_TIMER_STATE_STARTED == m_simple_timer_state)
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{
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err_code = app_simple_timer_stop();
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APP_ERROR_CHECK(err_code);
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}
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if (SIMPLE_TIMER_STATE_STOPPED == m_simple_timer_state)
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{
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nrf_drv_timer_clear(&SIMPLE_TIMER);
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}
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m_mode = mode;
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m_timeout_handler = timeout_handler;
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mp_timeout_handler_context = p_context;
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nrf_drv_timer_extended_compare(
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&SIMPLE_TIMER, NRF_TIMER_CC_CHANNEL0, (uint32_t)timeout_ticks, timer_short, true);
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if (m_simple_timer_state == SIMPLE_TIMER_STATE_STOPPED)
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{
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nrf_drv_timer_resume(&SIMPLE_TIMER);
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}
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else
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{
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nrf_drv_timer_enable(&SIMPLE_TIMER);
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}
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m_simple_timer_state = SIMPLE_TIMER_STATE_STARTED;
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return NRF_SUCCESS;
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}
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uint32_t app_simple_timer_stop(void)
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{
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if (SIMPLE_TIMER_STATE_STARTED == m_simple_timer_state)
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{
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nrf_drv_timer_pause(&SIMPLE_TIMER);
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m_simple_timer_state = SIMPLE_TIMER_STATE_STOPPED;
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}
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return NRF_SUCCESS;
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}
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uint32_t app_simple_timer_uninit(void)
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{
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uint32_t err_code = NRF_SUCCESS;
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if (SIMPLE_TIMER_STATE_IDLE != m_simple_timer_state)
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{
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nrf_drv_timer_uninit(&SIMPLE_TIMER);
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m_simple_timer_state = SIMPLE_TIMER_STATE_IDLE;
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}
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return err_code;
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}
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#endif //NRF_MODULE_ENABLED(SIMPLE_TIMER)
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