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esp-idf/components/esp_system
History
Jing Li 75a82988f1 Merge branch 'refactor/wdt_use_unified_type' into 'master' 
wdt: refactor wdt codes to use unified type

Closes IDF-5653

See merge request espressif/esp-idf!22378
2023-02-21 09:46:06 +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 esp_system: include FreeRTOS.h explicitly in critical_section.h 2023-02-16 15:12:13 +08:00
ld esp_mm: h2 support 2023-02-07 20:23:53 +08:00
port Merge branch 'refactor/wdt_use_unified_type' into 'master' 2023-02-21 09:46:06 +08:00
task_wdt esp_timer: add a function to restart timer 2022-10-18 04:42:27 +00:00
test rmt: expose private API to get channel ID 2023-02-16 11:37:25 +08:00
test_apps TWDT: Use the new TWDT Kconfig options in the examples and tests 2023-02-17 11:22:25 +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_mm: new virtual memory mapping apis via mmu 2023-02-07 20:23:52 +08:00
crosscore_int.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
debug_stubs.c debug_stubs: Refactor and add support for RISCV 2021-11-04 01:33:24 +03:00
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: implement interrupt wdt and task wdt for ESP32-C2 2022-09-15 14:37:59 +08:00
Kconfig esp32h2(ci): enable target test 2023-02-15 10:20:43 +08:00
linker.lf feat(esp_system): Partially buildable on Linux now 2022-11-16 09:03:09 +01:00
panic.c Merge branch 'refactor/wdt_use_unified_type' into 'master' 2023-02-21 09:46:06 +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 clock retention: supported soc and modem system power and clock sleep retention 2023-02-15 11:46:40 +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.