esp-idf/components/esp_system
Marius Vikhammer f9c1a2b791 Merge branch 'feature/core_c6_component_tests' into 'master'
ci: update idf-core related tests for C6

Closes IDF-6888

See merge request espressif/esp-idf!22282
2023-02-14 16:47:52 +08:00
..
host_test/test_esp_system
include wdt: add support for WDTs on C6 2023-01-19 12:58:26 +08:00
ld esp_mm: h2 support 2023-02-07 20:23:53 +08:00
port Merge branch 'bugfix/reset_modem_lpcon_in_soft_reset' into 'master' 2023-02-14 10:31:17 +08:00
task_wdt
test ci: update idf-core related tests for C6 2023-02-13 13:01:57 +08:00
test_apps UT/esp32c2: reenable pm and sleep related UT 2023-02-02 20:26:08 +08:00
test_eh_frame_parser
.build-test-rules.yml UT/esp32c2: reenable pm and sleep related UT 2023-02-02 20:26:08 +08:00
CMakeLists.txt esp_mm: new virtual memory mapping apis via mmu 2023-02-07 20:23:52 +08:00
Kconfig
README.md
app.lf
check_system_init_priorities.py
crosscore_int.c
debug_stubs.c
eh_frame_parser.c
esp_err.c feature: add ram loadable app support 2023-02-01 17:57:22 +08:00
esp_ipc.c
esp_system.c
fpga_overrides.c pmu: sleep initialization and sleep start support for esp32c6 2023-01-31 22:12:27 +08:00
freertos_hooks.c
int_wdt.c
linker.lf
panic.c
sdkconfig.rename
sdkconfig.rename.esp32
sdkconfig.rename.esp32c3
sdkconfig.rename.esp32s2
sdkconfig.rename.esp32s3
stack_check.c
startup.c feature: add ram loadable app support 2023-02-01 17:57:22 +08:00
system_init_fn.txt sleep: light sleep supported for esp32c6 2023-01-31 22:12:58 +08:00
system_time.c
systick_etm.c
ubsan.c
xt_wdt.c

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.