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Outline
#include "sdkconfig.h"
#include "esp_timer.h"
#include "esp_timer_impl.h"
#include "esp_system.h"
#include "esp_newlib.h"
#include "esp_log.h"
#include "esp_private/startup_internal.h"
#include "esp32/rtc.h"
#include "esp32s2/rtc.h"
#include "esp32s3/rtc.h"
#include "esp32c3/rtc.h"
#include "esp32c2/rtc.h"
#include "esp32c6/rtc.h"
#include "esp32c61/rtc.h"
#include "esp32c5/rtc.h"
#include "esp32h2/rtc.h"
#include "esp32p4/rtc.h"
TAG
s_correction_us
esp_timer_impl_init_system_time()
esp_system_get_time()
esp_system_get_time_resolution()
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/esp_timer/src/system_time.c
 
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/* * SPDX-FileCopyrightText: 2017-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ // Provides strong definition for system time functions relied upon // by core components. #include "sdkconfig.h" #if CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER #include "esp_timer.h" #include "esp_timer_impl.h" #include "esp_system.h" #include "esp_newlib.h" #include "esp_log.h" #include "esp_private/startup_internal.h"6 includes //TODO: IDF-9526, refactor this #if CONFIG_IDF_TARGET_ESP32 #include "esp32/rtc.h" #elif CONFIG_IDF_TARGET_ESP32S2 #include "esp32s2/rtc.h" #elif CONFIG_IDF_TARGET_ESP32S3 #include "esp32s3/rtc.h" #elif CONFIG_IDF_TARGET_ESP32C3 #include "esp32c3/rtc.h" #elif CONFIG_IDF_TARGET_ESP32C2 #include "esp32c2/rtc.h" #elif CONFIG_IDF_TARGET_ESP32C6 #include "esp32c6/rtc.h" #elif CONFIG_IDF_TARGET_ESP32C61 #include "esp32c61/rtc.h" #elif CONFIG_IDF_TARGET_ESP32C5 #include "esp32c5/rtc.h" #elif CONFIG_IDF_TARGET_ESP32H2 #include "esp32h2/rtc.h" #elif CONFIG_IDF_TARGET_ESP32P4 #include "esp32p4/rtc.h" #endif __attribute__((unused)) static const char* TAG = "system_time"; // Correction for underlying timer to keep definition // of system time consistent. static int64_t s_correction_us = 0; void esp_timer_impl_init_system_time(void) { s_correction_us = esp_rtc_get_time_us() - g_startup_time - esp_timer_impl_get_time(); #if defined(CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER) && defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER) esp_err_t err = esp_register_shutdown_handler(esp_sync_timekeeping_timers); if (err != ESP_OK) { ESP_LOGW(TAG, "Register shutdown handler failed, err = 0x%x", err); }{...} /* ... */#endif }{ ... } int64_t IRAM_ATTR esp_system_get_time(void) { return esp_timer_get_time() + s_correction_us; }{ ... } uint32_t IRAM_ATTR esp_system_get_time_resolution(void) { return 1000; }{ ... } #endif/* ... */
Details