esp-idf/components/esp_system
Mahavir Jain 72b7161612 Merge branch 'test/enable_esp_crt_bundle_tests_for_esp32h2' into 'master'
test: enable mbedtls esp_crt_bundle test for esp32h2

Closes IDF-6847

See merge request espressif/esp-idf!22725
2023-03-14 18:54:15 +08:00
..
host_test/test_esp_system
include
ld
port system: Clean up code, some single core chips have useless dual-core code 2023-03-13 10:27:57 +08:00
task_wdt
test_apps
test_eh_frame_parser
.build-test-rules.yml
CMakeLists.txt
Kconfig test: enable mbedtls esp_crt_bundle test for esp32h2 2023-03-13 12:00:01 +05:30
README.md
app.lf
check_system_init_priorities.py
crosscore_int.c
debug_stubs.c
eh_frame_parser.c
esp_err.c
esp_ipc.c
esp_system.c
fpga_overrides.c
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
system_init_fn.txt
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.