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esp-idf/components/esp_system
Historia
Song Ruo Jing 182e937c5a clk_tree: Add basic clock support for esp32c6 
- Support SOC ROOT clock source switch
    - Support CPU frequency change
    - Support RTC SLOW clock source switch
    - Support RTC SLOW clock + RC FAST calibration

    Remove FPGA build for esp32c6
 		2022-12-13 19:18:34 +08:00
..
host_test/test_esp_system heap: add linux target support 2022-12-06 10:49:59 +08:00
include ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
ld Merge branch 'feature/s2_bootld_iram_increase' into 'master' 2022-12-12 11:50:12 +08:00
port clk_tree: Add basic clock support for esp32c6 2022-12-13 19:18:34 +08:00
task_wdt esp_timer: add a function to restart timer 2022-10-18 04:42:27 +00:00
test ci: Disable all currently failed target tests for esp32c6 2022-11-28 12:09:08 +08:00
test_apps ci: Make consistence between pytest_*.py and .build-test-rules.yml for esp32c6 (i.e. to pass check_test_scripts_build_test_rules.py) 2022-11-28 11:58:30 +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 ci: Make consistence between pytest_*.py and .build-test-rules.yml for esp32c6 (i.e. to pass check_test_scripts_build_test_rules.py) 2022-11-28 11:58:30 +08:00
CMakeLists.txt systimer: support etm event 2022-11-23 15:32:34 +08:00
Kconfig ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
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
check_system_init_priorities.py esp_system: add a script to check the startup priorities 2022-07-12 16:58:14 +02:00
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 esp_system: fix address printed by ESP_ERROR_CHECK 2022-07-12 17:01:47 +02:00
esp_ipc.c ipc: Increase stacksize when compiling with -O0 2022-07-18 13:55:03 +08:00
esp_system.c feat(esp_system): Partially buildable on Linux now 2022-11-16 09:03:09 +01:00
fpga_overrides.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +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
linker.lf feat(esp_system): Partially buildable on Linux now 2022-11-16 09:03:09 +01:00
panic.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
sdkconfig.rename TWDT: the Kconfig option ESP_TASK_WDT_EN is now used to enable Task Watchdog 2022-09-15 14:37:59 +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 ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
system_init_fn.txt esp_system: usb_console: fix restart when Wi-Fi is working 2022-07-28 17:15:03 +02:00
system_time.c ESP32H2: Add system support for ESP32H2 2022-12-07 11:38:51 +08:00
systick_etm.c systimer: support etm event 2022-11-23 15:32:34 +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.