/** * Copyright (c) 2016 - 2020, 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. * */ #include "sdk_common.h" #if NRF_MODULE_ENABLED(APP_TIMER) #include "app_timer.h" #include #include "nrf.h" #include "nrf_soc.h" #include "app_error.h" #include "cmsis_os.h" #include "app_util_platform.h" #define RTC1_IRQ_PRI APP_IRQ_PRIORITY_LOWEST /**< Priority of the RTC1 interrupt. */ #define MAX_RTC_COUNTER_VAL 0x00FFFFFF /**< Maximum value of the RTC counter. */ /**@brief This structure keeps information about osTimer.*/ typedef struct { osTimerDef_t timerDef; uint32_t buffer[6]; osTimerId id; }app_timer_info_t; /**@brief Store an array of timers with configuration. */ typedef struct { uint8_t max_timers; /**< The maximum number of timers*/ uint32_t prescaler; app_timer_info_t * app_timers; /**< Pointer to table of timers*/ }app_timer_control_t; app_timer_control_t app_timer_control; /**@brief This structure is defined by RTX. It keeps information about created osTimers. It is used in app_timer_start(). */ typedef struct os_timer_cb_ { struct os_timer_cb_ * next; /**< Pointer to next active Timer */ uint8_t state; /**< Timer State */ uint8_t type; /**< Timer Type (Periodic/One-shot). */ uint16_t reserved; /**< Reserved. */ uint32_t tcnt; /**< Timer Delay Count. */ uint32_t icnt; /**< Timer Initial Count. */ void * arg; /**< Timer Function Argument. */ const osTimerDef_t * timer; /**< Pointer to Timer definition. */ } os_timer_cb; /**@brief This functions are defined by RTX.*/ //lint --save -e10 -e19 -e526 extern osStatus svcTimerStop(osTimerId timer_id); /**< Used in app_timer_stop(). */ extern osStatus svcTimerStart(osTimerId timer_id, uint32_t millisec); /**< Used in app_timer_start(). */ // lint --restore static void * rt_id2obj (void *id) /**< Used in app_timer_start(). This function gives information if osTimerID is valid */ { if ((uint32_t)id & 3U) { return NULL; } #ifdef OS_SECTIONS_LINK_INFO if ((os_section_id$$Base != 0U) && (os_section_id$$Limit != 0U)) { if (id < (void *)os_section_id$$Base) { return NULL; } if (id >= (void *)os_section_id$$Limit) { return NULL; } } #endif return id; } ret_code_t app_timer_init(void) { if (p_buffer == NULL) { return NRF_ERROR_INVALID_PARAM; } app_timer_control.app_timers = p_buffer; NVIC_SetPriority(RTC1_IRQn, RTC1_IRQ_PRI); return NRF_SUCCESS; } ret_code_t app_timer_create(app_timer_id_t const * p_timer_id, app_timer_mode_t mode, app_timer_timeout_handler_t timeout_handler) { if ((timeout_handler == NULL) || (p_timer_id == NULL)) { return NRF_ERROR_INVALID_PARAM; } app_timer_info_t * p_timer_info = (app_timer_info_t *)*p_timer_id; p_timer_info->timerDef.timer = p_timer_info->buffer; p_timer_info->timerDef.ptimer = (os_ptimer)timeout_handler; p_timer_info->id = osTimerCreate(&(p_timer_info->timerDef), (os_timer_type)mode, NULL); if (p_timer_info->id) return NRF_SUCCESS; else { return NRF_ERROR_INVALID_PARAM; // This error is unspecified by rtx } } #define osTimerRunning 2 ret_code_t app_timer_start(app_timer_id_t timer_id, uint32_t timeout_ticks, void * p_context) { if ((timeout_ticks < APP_TIMER_MIN_TIMEOUT_TICKS)) { return NRF_ERROR_INVALID_PARAM; } uint32_t timeout_ms = ((uint32_t)ROUNDED_DIV(timeout_ticks * 1000 * (APP_TIMER_CONFIG_RTC_FREQUENCY + 1), (uint32_t)APP_TIMER_CLOCK_FREQ)); app_timer_info_t * p_timer_info = (app_timer_info_t *)timer_id; if (rt_id2obj((void *)p_timer_info->id) == NULL) return NRF_ERROR_INVALID_PARAM; // Pass p_context to timer_timeout_handler ((os_timer_cb *)(p_timer_info->id))->arg = p_context; if (((os_timer_cb *)(p_timer_info->id))->state == osTimerRunning) { return NRF_SUCCESS; } // osTimerStart() returns osErrorISR if it is called in interrupt routine. switch (osTimerStart((osTimerId)p_timer_info->id, timeout_ms) ) { case osOK: return NRF_SUCCESS; case osErrorISR: break; case osErrorParameter: return NRF_ERROR_INVALID_PARAM; default: return NRF_ERROR_INVALID_PARAM; } // Start timer without svcCall switch (svcTimerStart((osTimerId)p_timer_info->id, timeout_ms)) { case osOK: return NRF_SUCCESS; case osErrorISR: return NRF_ERROR_INVALID_STATE; case osErrorParameter: return NRF_ERROR_INVALID_PARAM; default: return NRF_ERROR_INVALID_PARAM; } } ret_code_t app_timer_stop(app_timer_id_t timer_id) { app_timer_info_t * p_timer_info = (app_timer_info_t *)timer_id; switch (osTimerStop((osTimerId)p_timer_info->id) ) { case osOK: return NRF_SUCCESS; case osErrorISR: break; case osErrorParameter: return NRF_ERROR_INVALID_PARAM; case osErrorResource: return NRF_SUCCESS; default: return NRF_ERROR_INVALID_PARAM; } // Stop timer without svcCall switch (svcTimerStop((osTimerId)p_timer_info->id)) { case osOK: return NRF_SUCCESS; case osErrorISR: return NRF_ERROR_INVALID_STATE; case osErrorParameter: return NRF_ERROR_INVALID_PARAM; case osErrorResource: return NRF_SUCCESS; default: return NRF_ERROR_INVALID_PARAM; } } ret_code_t app_timer_stop_all(void) { for (int i = 0; i < app_timer_control.max_timers; i++) { if (app_timer_control.app_timers[i].id) { (void)app_timer_stop((app_timer_id_t)app_timer_control.app_timers[i].id); } } return 0; } extern uint32_t os_tick_val(void); uint32_t app_timer_cnt_get(void) { return os_tick_val(); } uint32_t app_timer_cnt_diff_compute(uint32_t ticks_to, uint32_t ticks_from) { return ((ticks_to - ticks_from) & MAX_RTC_COUNTER_VAL); } #endif //NRF_MODULE_ENABLED(APP_TIMER)