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esp-idf/components/esp_system
History
Jakob Hasse a6cbf68991 compiler: replaced noreturn by __noreturn__ in header files 
* noreturn may be replaced by third-party macros,
  rendering it ineffective

* Closes https://github.com/espressif/esp-idf/issues/11339
2023-05-18 12:49:40 +08:00
..
include compiler: replaced noreturn by __noreturn__ in header files 2023-05-18 12:49:40 +08:00
ld esp_system (C6 & H2): Enables BOOTLOADER_RESERVE_RTC_MEM feature for bootloader 2023-05-01 06:27:11 +00:00
port compiler: replaced noreturn by __noreturn__ in header files 2023-05-18 12:49:40 +08:00
task_wdt esp_system: Fix TIMG0 still enabled after Timer is freed 2023-03-06 04:58:11 +00:00
test_apps ci: re-enable reset reason tests for all targets except H2. 2023-05-16 05:22:07 +00:00
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 ci: fix invalid kconfig options in system test apps 2023-05-10 09:42:12 +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_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00
crosscore_int.c esp32h4: checked all the corner stuffs of the removal 2023-04-26 18:53:12 +08:00
debug_stubs.c esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00
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 memprot: move memprot functions out of IRAM 2023-03-17 14:51:20 +08:00
fpga_overrides.c esp32h4: removed esp32h4 related codes 2023-04-26 18:53:12 +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 esp32h4: checked all the corner stuffs of the removal 2023-04-26 18:53:12 +08:00
linker.lf esp-system: move uncessary IRAM functions to flash 2023-04-24 10:27:31 +08:00
panic.c mcpwm: reset peripheral in restart, panic and halt 2023-05-09 18:30:46 +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 Merge branch 'feature/esp_timer_uses_shared_isr' into 'master' 2023-03-07 13:38:23 +08:00
system_time.c esp32h4: removed esp32h4 related codes 2023-04-26 18:53:12 +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 esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00

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.