1 // Copyright 2017 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // Provides strong definition for system time functions relied upon 16 // by core components. 17 #include "sdkconfig.h" 18 19 #if CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER 20 #include "esp_timer.h" 21 #include "esp_timer_impl.h" 22 #include "esp_system.h" 23 #include "esp_newlib.h" 24 #include "esp_log.h" 25 26 #include "esp_private/startup_internal.h" 27 28 #if CONFIG_IDF_TARGET_ESP32 29 #include "esp32/rtc.h" 30 #elif CONFIG_IDF_TARGET_ESP32S2 31 #include "esp32s2/rtc.h" 32 #elif CONFIG_IDF_TARGET_ESP32S3 33 #include "esp32s3/rtc.h" 34 #elif CONFIG_IDF_TARGET_ESP32C3 35 #include "esp32c3/rtc.h" 36 #elif CONFIG_IDF_TARGET_ESP32H2 37 #include "esp32h2/rtc.h" 38 #endif 39 40 __attribute__((unused)) static const char* TAG = "system_time"; 41 42 // Correction for underlying timer to keep definition 43 // of system time consistent. 44 static int64_t s_correction_us = 0; 45 esp_timer_impl_init_system_time(void)46void esp_timer_impl_init_system_time(void) 47 { 48 s_correction_us = esp_rtc_get_time_us() - g_startup_time - esp_timer_impl_get_time(); 49 #if defined(CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER) && defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER) 50 esp_err_t err = esp_register_shutdown_handler(esp_sync_counters_rtc_and_frc); 51 if (err != ESP_OK) { 52 ESP_LOGW(TAG, "Register shutdown handler failed, err = 0x%x", err); 53 } 54 #endif 55 } 56 esp_system_get_time(void)57int64_t IRAM_ATTR esp_system_get_time(void) 58 { 59 return esp_timer_get_time() + s_correction_us; 60 } 61 esp_system_get_time_resolution(void)62uint32_t IRAM_ATTR esp_system_get_time_resolution(void) 63 { 64 return 1000; 65 } 66 #endif 67
