/** * Copyright (c) 2015 - 2018, 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 #include "iot_timer.h" #include "sdk_common.h" #include "sdk_config.h" #include "iot_errors.h" /** * @defgroup api_param_check API Parameters check macros. * * @details Macros that verify parameters passed to the module in the APIs. These macros * could be mapped to nothing in final versions of code to save execution and size. * IOT_TIMER_DISABLE_API_PARAM_CHECK should be defined to disable these checks. * * @{ */ #if (IOT_TIMER_DISABLE_API_PARAM_CHECK == 0) /** * @brief Verify NULL parameters are not passed to API by application. */ #define NULL_PARAM_CHECK(PARAM) \ if ((PARAM) == NULL) \ { \ return (NRF_ERROR_NULL | IOT_TIMER_ERR_BASE); \ } #define VERIFY_CLIENT_LIST_IS_VALID(PARAM) \ if ((PARAM) != NULL) \ { \ uint8_t i; \ for (i = 0; i < (PARAM)->client_list_length; i++) \ { \ if (((PARAM)->p_client_list[i].iot_timer_callback) == NULL) \ { \ return (NRF_ERROR_INVALID_PARAM | IOT_TIMER_ERR_BASE); \ } \ if (((PARAM)->p_client_list[i].cb_interval == 0) || \ ((PARAM)->p_client_list[i].cb_interval < IOT_TIMER_RESOLUTION_IN_MS) || \ (((PARAM)->p_client_list[i].cb_interval % IOT_TIMER_RESOLUTION_IN_MS) != 0)) \ { \ return (NRF_ERROR_INVALID_PARAM | IOT_TIMER_ERR_BASE); \ } \ } \ } #define VERIFY_WALL_CLOCK_VALUE_IS_VALID(PARAM) \ if ((PARAM) != NULL) \ { \ if ((*PARAM % IOT_TIMER_RESOLUTION_IN_MS) != 0) \ { \ return (NRF_ERROR_INVALID_PARAM | IOT_TIMER_ERR_BASE); \ } \ } /** * @brief Verify NULL parameters are not passed to API by application. */ #define NULL_PARAM_CHECK(PARAM) \ if ((PARAM) == NULL) \ { \ return (NRF_ERROR_NULL | IOT_TIMER_ERR_BASE); \ } #else // IOT_TIMER_DISABLE_API_PARAM_CHECK #define NULL_PARAM_CHECK(PARAM) #define VERIFY_CLIENT_LIST_IS_VALID(PARAM) #define VERIFY_WALL_CLOCK_VALUE_IS_VALID(PARAM) #endif //IOT_TIMER_DISABLE_API_PARAM_CHECK /** @} */ static iot_timer_time_in_ms_t m_wall_clock = 0; static const iot_timer_clients_list_t * m_clients = NULL; uint32_t iot_timer_client_list_set(const iot_timer_clients_list_t * p_list_of_clients) { VERIFY_CLIENT_LIST_IS_VALID(p_list_of_clients); m_clients = p_list_of_clients; return NRF_SUCCESS; } uint32_t iot_timer_update(void) { m_wall_clock += IOT_TIMER_RESOLUTION_IN_MS; if ((0xFFFFFFFFUL - m_wall_clock) < IOT_TIMER_RESOLUTION_IN_MS) { m_wall_clock = IOT_TIMER_RESOLUTION_IN_MS; } if (m_clients != NULL) { uint8_t index; for (index = 0; index < m_clients->client_list_length; index++) { if ((m_wall_clock % m_clients->p_client_list[index].cb_interval) == 0) { m_clients->p_client_list[index].iot_timer_callback(m_wall_clock); } } } return NRF_SUCCESS; } uint32_t iot_timer_wall_clock_get(iot_timer_time_in_ms_t * p_elapsed_time) { NULL_PARAM_CHECK(p_elapsed_time); *p_elapsed_time = m_wall_clock; return NRF_SUCCESS; } uint32_t iot_timer_wall_clock_delta_get(iot_timer_time_in_ms_t * p_past_time, \ iot_timer_time_in_ms_t * p_delta_time) { NULL_PARAM_CHECK(p_past_time); NULL_PARAM_CHECK(p_delta_time); VERIFY_WALL_CLOCK_VALUE_IS_VALID(p_past_time); if (*p_past_time == m_wall_clock) { *p_delta_time = 0; } else if (*p_past_time < m_wall_clock) { *p_delta_time = m_wall_clock - *p_past_time; } else { // An integer overflow of the wall clock occured since *p_past_time. iot_timer_time_in_ms_t max_wall_clock = (0xFFFFFFFFUL / IOT_TIMER_RESOLUTION_IN_MS) \ * IOT_TIMER_RESOLUTION_IN_MS; *p_delta_time = max_wall_clock - *p_past_time; // Before overflow. *p_delta_time += m_wall_clock; // After overflow. *p_delta_time -= IOT_TIMER_RESOLUTION_IN_MS; // Because of handling of wall clock integer overflow, see above. } return NRF_SUCCESS; }