279 lines
8.4 KiB
C
279 lines
8.4 KiB
C
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/**
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* Copyright (c) 2016 - 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(APP_TIMER)
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#include "app_timer.h"
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#include <stdlib.h>
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#include "nrf.h"
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#include "nrf_soc.h"
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#include "app_error.h"
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#include "cmsis_os.h"
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#include "app_util_platform.h"
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#define RTC1_IRQ_PRI APP_IRQ_PRIORITY_LOWEST /**< Priority of the RTC1 interrupt. */
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#define MAX_RTC_COUNTER_VAL 0x00FFFFFF /**< Maximum value of the RTC counter. */
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/**@brief This structure keeps information about osTimer.*/
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typedef struct
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{
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osTimerDef_t timerDef;
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uint32_t buffer[6];
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osTimerId id;
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}app_timer_info_t;
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/**@brief Store an array of timers with configuration. */
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typedef struct
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{
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uint8_t max_timers; /**< The maximum number of timers*/
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uint32_t prescaler;
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app_timer_info_t * app_timers; /**< Pointer to table of timers*/
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}app_timer_control_t;
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app_timer_control_t app_timer_control;
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/**@brief This structure is defined by RTX. It keeps information about created osTimers. It is used in app_timer_start(). */
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typedef struct os_timer_cb_
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{
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struct os_timer_cb_ * next; /**< Pointer to next active Timer */
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uint8_t state; /**< Timer State */
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uint8_t type; /**< Timer Type (Periodic/One-shot). */
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uint16_t reserved; /**< Reserved. */
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uint32_t tcnt; /**< Timer Delay Count. */
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uint32_t icnt; /**< Timer Initial Count. */
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void * arg; /**< Timer Function Argument. */
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const osTimerDef_t * timer; /**< Pointer to Timer definition. */
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} os_timer_cb;
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/**@brief This functions are defined by RTX.*/
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//lint --save -e10 -e19 -e526
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extern osStatus svcTimerStop(osTimerId timer_id); /**< Used in app_timer_stop(). */
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extern osStatus svcTimerStart(osTimerId timer_id, uint32_t millisec); /**< Used in app_timer_start(). */
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// lint --restore
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static void * rt_id2obj (void *id) /**< Used in app_timer_start(). This function gives information if osTimerID is valid */
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{
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if ((uint32_t)id & 3U)
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{
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return NULL;
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}
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#ifdef OS_SECTIONS_LINK_INFO
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if ((os_section_id$$Base != 0U) && (os_section_id$$Limit != 0U))
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{
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if (id < (void *)os_section_id$$Base)
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{
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return NULL;
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}
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if (id >= (void *)os_section_id$$Limit)
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{
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return NULL;
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}
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}
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#endif
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return id;
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}
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ret_code_t app_timer_init(void)
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{
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if (p_buffer == NULL)
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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app_timer_control.app_timers = p_buffer;
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NVIC_SetPriority(RTC1_IRQn, RTC1_IRQ_PRI);
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return NRF_SUCCESS;
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}
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ret_code_t app_timer_create(app_timer_id_t const * p_timer_id,
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app_timer_mode_t mode,
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app_timer_timeout_handler_t timeout_handler)
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{
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if ((timeout_handler == NULL) || (p_timer_id == NULL))
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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app_timer_info_t * p_timer_info = (app_timer_info_t *)*p_timer_id;
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p_timer_info->timerDef.timer = p_timer_info->buffer;
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p_timer_info->timerDef.ptimer = (os_ptimer)timeout_handler;
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p_timer_info->id = osTimerCreate(&(p_timer_info->timerDef), (os_timer_type)mode, NULL);
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if (p_timer_info->id)
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return NRF_SUCCESS;
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else
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{
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return NRF_ERROR_INVALID_PARAM; // This error is unspecified by rtx
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}
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}
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#define osTimerRunning 2
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ret_code_t app_timer_start(app_timer_id_t timer_id, uint32_t timeout_ticks, void * p_context)
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{
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if ((timeout_ticks < APP_TIMER_MIN_TIMEOUT_TICKS))
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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uint32_t timeout_ms =
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((uint32_t)ROUNDED_DIV(timeout_ticks * 1000 * (APP_TIMER_CONFIG_RTC_FREQUENCY + 1),
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(uint32_t)APP_TIMER_CLOCK_FREQ));
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app_timer_info_t * p_timer_info = (app_timer_info_t *)timer_id;
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if (rt_id2obj((void *)p_timer_info->id) == NULL)
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return NRF_ERROR_INVALID_PARAM;
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// Pass p_context to timer_timeout_handler
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((os_timer_cb *)(p_timer_info->id))->arg = p_context;
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if (((os_timer_cb *)(p_timer_info->id))->state == osTimerRunning)
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{
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return NRF_SUCCESS;
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}
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// osTimerStart() returns osErrorISR if it is called in interrupt routine.
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switch (osTimerStart((osTimerId)p_timer_info->id, timeout_ms) )
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{
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case osOK:
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return NRF_SUCCESS;
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case osErrorISR:
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break;
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case osErrorParameter:
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return NRF_ERROR_INVALID_PARAM;
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default:
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return NRF_ERROR_INVALID_PARAM;
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}
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// Start timer without svcCall
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switch (svcTimerStart((osTimerId)p_timer_info->id, timeout_ms))
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{
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case osOK:
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return NRF_SUCCESS;
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case osErrorISR:
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return NRF_ERROR_INVALID_STATE;
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case osErrorParameter:
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return NRF_ERROR_INVALID_PARAM;
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default:
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return NRF_ERROR_INVALID_PARAM;
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}
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}
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ret_code_t app_timer_stop(app_timer_id_t timer_id)
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{
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app_timer_info_t * p_timer_info = (app_timer_info_t *)timer_id;
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switch (osTimerStop((osTimerId)p_timer_info->id) )
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{
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case osOK:
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return NRF_SUCCESS;
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case osErrorISR:
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break;
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case osErrorParameter:
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return NRF_ERROR_INVALID_PARAM;
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case osErrorResource:
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return NRF_SUCCESS;
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default:
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return NRF_ERROR_INVALID_PARAM;
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}
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// Stop timer without svcCall
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switch (svcTimerStop((osTimerId)p_timer_info->id))
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{
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case osOK:
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return NRF_SUCCESS;
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case osErrorISR:
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return NRF_ERROR_INVALID_STATE;
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case osErrorParameter:
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return NRF_ERROR_INVALID_PARAM;
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case osErrorResource:
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return NRF_SUCCESS;
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default:
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return NRF_ERROR_INVALID_PARAM;
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}
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}
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ret_code_t app_timer_stop_all(void)
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{
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for (int i = 0; i < app_timer_control.max_timers; i++)
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{
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if (app_timer_control.app_timers[i].id)
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{
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(void)app_timer_stop((app_timer_id_t)app_timer_control.app_timers[i].id);
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}
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}
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return 0;
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}
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extern uint32_t os_tick_val(void);
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uint32_t app_timer_cnt_get(void)
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{
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return os_tick_val();
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}
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uint32_t app_timer_cnt_diff_compute(uint32_t ticks_to,
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uint32_t ticks_from)
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{
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return ((ticks_to - ticks_from) & MAX_RTC_COUNTER_VAL);
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}
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#endif //NRF_MODULE_ENABLED(APP_TIMER)
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