1 /* 2 * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 #include <stdint.h> 7 #include <time.h> 8 #include <sys/time.h> 9 #include <sys/lock.h> 10 11 #include "esp_attr.h" 12 #include "esp_system.h" 13 14 #include "soc/rtc.h" 15 #include "esp_rom_sys.h" 16 17 #include "esp_private/system_internal.h" 18 #include "esp_private/esp_clk.h" 19 20 #include "esp_time_impl.h" 21 22 #include "sdkconfig.h" 23 24 #if CONFIG_IDF_TARGET_ESP32 25 #include "esp32/rom/rtc.h" 26 #include "esp32/rtc.h" 27 #elif CONFIG_IDF_TARGET_ESP32S2 28 #include "esp32s2/rom/rtc.h" 29 #include "esp32s2/rtc.h" 30 #elif CONFIG_IDF_TARGET_ESP32S3 31 #include "esp32s3/rom/rtc.h" 32 #include "esp32s3/rtc.h" 33 #elif CONFIG_IDF_TARGET_ESP32C3 34 #include "esp32c3/rom/rtc.h" 35 #include "esp32c3/rtc.h" 36 #elif CONFIG_IDF_TARGET_ESP32C2 37 #include "esp32c2/rom/rtc.h" 38 #include "esp32c2/rtc.h" 39 #elif CONFIG_IDF_TARGET_ESP32C6 40 #include "esp32c6/rom/rtc.h" 41 #include "esp32c6/rtc.h" 42 #elif CONFIG_IDF_TARGET_ESP32H2 43 #include "esp32h2/rom/rtc.h" 44 #include "esp32h2/rtc.h" 45 #endif 46 47 48 49 // Offset between High resolution timer and the RTC. 50 // Initialized after reset or light sleep. 51 #if defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER) && defined(CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER) 52 int64_t s_microseconds_offset = 0; 53 #endif 54 55 #ifndef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 56 static uint64_t s_boot_time; // when RTC is used to persist time, two RTC_STORE registers are used to store boot time instead 57 #endif 58 59 static _lock_t s_boot_time_lock; 60 61 #if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) || defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER ) esp_time_impl_get_time_since_boot(void)62uint64_t esp_time_impl_get_time_since_boot(void) 63 { 64 uint64_t microseconds = 0; 65 66 #ifdef CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER 67 #ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 68 microseconds = s_microseconds_offset + esp_system_get_time(); 69 #else 70 microseconds = esp_system_get_time(); 71 #endif // CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 72 #elif defined(CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER) 73 microseconds = esp_rtc_get_time_us(); 74 #endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER 75 return microseconds; 76 } 77 esp_time_impl_get_time(void)78uint64_t esp_time_impl_get_time(void) 79 { 80 uint64_t microseconds = 0; 81 #if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) 82 microseconds = esp_system_get_time(); 83 #elif defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER ) 84 microseconds = esp_rtc_get_time_us(); 85 #endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER 86 return microseconds; 87 } 88 89 #endif // defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) || defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER ) 90 91 esp_time_impl_set_boot_time(uint64_t time_us)92void esp_time_impl_set_boot_time(uint64_t time_us) 93 { 94 _lock_acquire(&s_boot_time_lock); 95 #ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 96 REG_WRITE(RTC_BOOT_TIME_LOW_REG, (uint32_t) (time_us & 0xffffffff)); 97 REG_WRITE(RTC_BOOT_TIME_HIGH_REG, (uint32_t) (time_us >> 32)); 98 #else 99 s_boot_time = time_us; 100 #endif 101 _lock_release(&s_boot_time_lock); 102 } 103 esp_time_impl_get_boot_time(void)104uint64_t esp_time_impl_get_boot_time(void) 105 { 106 uint64_t result; 107 _lock_acquire(&s_boot_time_lock); 108 #ifdef CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 109 result = ((uint64_t) REG_READ(RTC_BOOT_TIME_LOW_REG)) + (((uint64_t) REG_READ(RTC_BOOT_TIME_HIGH_REG)) << 32); 110 #else 111 result = s_boot_time; 112 #endif 113 _lock_release(&s_boot_time_lock); 114 return result; 115 } 116 esp_set_time_from_rtc(void)117void esp_set_time_from_rtc(void) 118 { 119 #if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) && defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER ) 120 // initialize time from RTC clock 121 s_microseconds_offset = esp_rtc_get_time_us() - esp_system_get_time(); 122 #endif // CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER && CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER 123 } 124 esp_sync_timekeeping_timers(void)125void esp_sync_timekeeping_timers(void) 126 { 127 #if defined( CONFIG_ESP_TIME_FUNCS_USE_ESP_TIMER ) && defined( CONFIG_ESP_TIME_FUNCS_USE_RTC_TIMER ) 128 struct timeval tv; 129 gettimeofday(&tv, NULL); 130 settimeofday(&tv, NULL); 131 int64_t s_microseconds_offset_cur = esp_rtc_get_time_us() - esp_system_get_time(); 132 esp_time_impl_set_boot_time(esp_time_impl_get_boot_time() + ((int64_t)s_microseconds_offset - s_microseconds_offset_cur)); 133 #endif 134 } 135 esp_time_impl_init(void)136void esp_time_impl_init(void) 137 { 138 esp_set_time_from_rtc(); 139 } 140
