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esp-idf/components/esp_system
Historia
Marius Vikhammer bb88338118 system: move kconfig options out of target component 
Moved the following kconfig options out of the target component:
 * ESP32_X_BROWNOUT_* -> esp_system
 * ESP32_X_DEBUG_OCDAWARE -> esp_system
 * APP_NO_BLOBS -> build type (main kconfig)
 		2022-03-02 01:22:26 +00:00
..
include esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
ld Fix typos. 2022-02-25 19:32:15 +01:00
port system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
test esp_timer: remove legacy ESP32 FRC timer implementation. 2022-02-10 15:17:49 +08:00
test_eh_frame_parser espsystem: Rearchitecture and fix eh_frame_parser bugs 2021-07-15 12:47:51 +08:00
CMakeLists.txt esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
Kconfig system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
README.md esp_system: add notes on timekeeping 2021-03-25 16:09:33 +08:00
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
crosscore_int.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +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_system: Fix copyright header 2022-02-28 11:41:02 +05:30
esp_err.c esp_common: move esp_err 2021-02-24 12:16:37 +08:00
esp_ipc.c esp_system: ipc_isr does not use its own initialization task, it is done from ipc_task() 2022-01-13 21:28:08 +08:00
esp_system.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
fpga_overrides.c ESP8684: add freertos, hal, esp_system support 2021-11-06 17:33:44 +08:00
freertos_hooks.c esp_common: move freertos hooks 2021-02-24 12:16:37 +08:00
int_wdt.c esp_rom: extract int matrix route and cpu ticks getter 2022-02-09 13:52:20 +08:00
linker.lf system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00
panic.c esp_hw_support: Removed deprecated CPU util functions 2021-12-28 16:58:37 +05:30
sdkconfig.rename system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32c3 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32h2 kconfig: also parse target specific sdkconfig.rename.TARGET files 2022-01-31 11:36:08 +08:00
sdkconfig.rename.esp32s2 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32s3 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
stack_check.c log: Remove redundant definition of LOG_LOCAL_LEVEL 2021-04-23 18:13:04 +10:00
startup.c system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
system_time.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
task_wdt.c freertos: Remove legacy data types 2022-02-09 23:05:45 +08:00
ubsan.c system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00
xt_wdt.c WDT: Add support for XTAL32K Watchdog timer 2021-09-02 09:09:00 +08:00

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.