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c19b37d2a9
In case when FRC and RTC counters are very different then the need to sync them before to restart the ESP to get the correct system time after reboot.
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Provides strong definition for system time functions relied upon
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// by core components.
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#include "sdkconfig.h"
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#if CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER
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#include "esp_timer.h"
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#include "esp_timer_impl.h"
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#include "esp_system.h"
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#include "esp_newlib.h"
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#include "esp_log.h"
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#include "esp_private/startup_internal.h"
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#if CONFIG_IDF_TARGET_ESP32
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#include "esp32/rtc.h"
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#elif CONFIG_IDF_TARGET_ESP32S2
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#include "esp32s2/rtc.h"
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#elif CONFIG_IDF_TARGET_ESP32S3
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#include "esp32s3/rtc.h"
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#elif CONFIG_IDF_TARGET_ESP32C3
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#include "esp32c3/rtc.h"
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#elif CONFIG_IDF_TARGET_ESP32H2
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#include "esp32h2/rtc.h"
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#endif
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__attribute__((unused)) static const char* TAG = "system_time";
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// Correction for underlying timer to keep definition
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// of system time consistent.
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static int64_t s_correction_us = 0;
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void esp_timer_impl_init_system_time(void)
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{
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s_correction_us = esp_rtc_get_time_us() - g_startup_time - esp_timer_impl_get_time();
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#if defined(CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER) && defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER)
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esp_err_t err = esp_register_shutdown_handler(esp_sync_counters_rtc_and_frc);
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if (err != ESP_OK) {
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ESP_LOGW(TAG, "Register shutdown handler failed, err = 0x%x", err);
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}
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#endif
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}
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int64_t IRAM_ATTR esp_system_get_time(void)
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{
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return esp_timer_get_time() + s_correction_us;
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}
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uint32_t IRAM_ATTR esp_system_get_time_resolution(void)
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{
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return 1000;
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}
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#endif
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