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91b86f55d5
esp-idf/components/esp_system
History
jiangguangming 91b86f55d5 esp_system: use ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE instead of IDF_TARGET_XXX
2023-03-06 20:32:04 +08:00
..
host_test/test_esp_system test: migrate linux target host test jobs into pytest-embedded 2023-01-16 10:25:55 +08:00
include wdt: add support for H2 2023-02-23 11:22:51 +08:00
ld esp32c6: bringup deepsleep examples 2023-03-02 15:06:05 +08:00
port esp_system: use ESP_ROM_NEEDS_SET_CACHE_MMU_SIZE instead of IDF_TARGET_XXX 2023-03-06 20:32:04 +08:00
task_wdt wdt: add support for H2 2023-02-23 11:22:51 +08:00
test_apps soc_caps: since esp32c6 only support one ext wakeup src, split SOC_PM_SUPPORT_EXT_WAKEUP 2023-03-02 15:06:05 +08:00
test_eh_frame_parser esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
.build-test-rules.yml UT/esp32c2: reenable pm and sleep related UT 2023-02-02 20:26:08 +08:00
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
check_system_init_priorities.py esp_system: add a script to check the startup priorities 2022-07-12 16:58:14 +02:00
CMakeLists.txt esp_wifi: move coex part from esp_wifi to esp_coex 2023-02-26 06:58:18 +00:00
crosscore_int.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
debug_stubs.c esp_system: fix gcc-12 compile errors 2023-02-22 05:33:03 +00:00
eh_frame_parser.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
esp_err.c feature: add ram loadable app support 2023-02-01 17:57:22 +08:00
esp_ipc.c esp_ipc: Use task notifications instead of semaphores 2023-01-10 05:11:31 +08:00
esp_system.c feat(esp_system): Partially buildable on Linux now 2022-11-16 09:03:09 +01:00
fpga_overrides.c pmu: sleep initialization and sleep start support for esp32c6 2023-01-31 22:12:27 +08:00
freertos_hooks.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
int_wdt.c wdt: add support for H2 2023-02-23 11:22:51 +08:00
Kconfig usb_serial_jtag: Improve the code for the issue of usb cdc device unable to work during sleep 2023-02-27 12:10:49 +08:00
linker.lf feat(esp_system): Partially buildable on Linux now 2022-11-16 09:03:09 +01:00
panic.c Merge branch 'feature/h2_wdt' into 'master' 2023-02-24 13:48:20 +08:00
README.md esp_system: add notes on timekeeping 2021-03-25 16:09:33 +08:00
sdkconfig.rename TWDT: Use the new TWDT Kconfig options in the examples and tests 2023-02-17 11:22:25 +08:00
sdkconfig.rename.esp32 kconfig: move remaining kconfig options out of target component 2022-05-23 17:57:45 +08:00
sdkconfig.rename.esp32c3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s2 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
stack_check.c esp_system: fix placement of __stack_chk_fail from flash to RAM 2022-12-07 08:49:12 +01:00
startup.c wdt: refactor wdt codes to use unified type 2023-02-15 12:08:55 +08:00
system_init_fn.txt codeclean: rename sleep_periph to sleep_sys_periph 2023-03-04 00:17:40 +08:00
system_time.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
systick_etm.c systimer: assign counter and alarm in esp_hw_support 2023-01-10 17:05:49 +08:00
ubsan.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
xt_wdt.c bugfix (esp_system): made xt_wdt spinlock static 2022-07-22 08:17:59 +00:00

README.md

System Notes

Timekeeping

The following are the timekeeping mechanisms available and their differences:

  1. System time (esp_system_get_time)

Time with the origin at g_startup_time. The implementation is not handled by esp_system, but it does provide a default implementation using RTC timer. Currently, esp_timer provides system time, since the hardware timers are under the control of that component. However, no matter the underlying timer, the system time provider should maintain the definition of having the origin point at g_startup_time.

  1. esp_timer time (esp_timer_get_time)

This is the time read from an underlying hardware timer, controlled through config. Origin is at the point where the underlying timer starts counting.

  1. newlib time (gettimeofday)

Timekeeping function in standard library. Can be set (settimeofday) or moved forward/backward (adjtime); with the possibility of the changes being made persistent through config. Currently implemented in terms of system time, as the point of origin is fixed. If persistence is enabled, RTC time is also used in conjuction with system time.

  1. RTC time (esp_rtc_get_time_us)

Time read from RTC timer.