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esp-idf
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esp_system
Angus Gratton c22eb769e7 Merge branch 'bugfix/panic_instrprohibited' into 'master' il y a 4 ans
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include c22eb769e7 Merge branch 'bugfix/panic_instrprohibited' into 'master' il y a 4 ans
port c22eb769e7 Merge branch 'bugfix/panic_instrprohibited' into 'master' il y a 4 ans
test 6b57f33858 Merge branch 'refactor/movements_from_target_components' into 'master' il y a 4 ans
CMakeLists.txt bbc599493e esp32: move common fragment definitions il y a 4 ans
Kconfig 49f5fb5112 esp_system: add VDD_SDIO power domain configuration to documentation il y a 4 ans
README.md 32aa5f7e25 esp_system: add notes on timekeeping il y a 4 ans
app.lf bbc599493e esp32: move common fragment definitions il y a 4 ans
component.mk bbc599493e esp32: move common fragment definitions il y a 4 ans
crosscore_int.c 393bd64a1e esp32: move crosscore int il y a 4 ans
dbg_stubs.c 5a56f794ec esp_common: move dbg stubs il y a 5 ans
esp_async_memcpy.c e926298160 async_mcp: clean eof flag when prepare rx descriptors il y a 5 ans
esp_err.c c16ceafa5c esp_common: move esp_err il y a 5 ans
esp_system.c a7bac58480 esp32: move system api to esp_system il y a 4 ans
fpga_overrides.c 349f0cad3e esp_common: other movements il y a 5 ans
freertos_hooks.c 0e0914476c esp_common: move freertos hooks il y a 5 ans
int_wdt.c deaad431f4 esp_common: move task, int wdt il y a 5 ans
intr_alloc.c e361498a2a intr_alloc: re-enable unit test il y a 5 ans
linker.lf a7bac58480 esp32: move system api to esp_system il y a 4 ans
panic.c 51e66d0f82 esp_common: move configs il y a 5 ans
sdkconfig.rename 51e66d0f82 esp_common: move configs il y a 5 ans
sleep_modes.c 7d85c42e52 esp32: move brownout and cache err int setup il y a 4 ans
stack_check.c 883aba20be esp_common: move stack check il y a 5 ans
startup.c 94ac251091 Merge branch 'doc/general_notes' into 'master' il y a 4 ans
system_time.c 5228d9f9ce esp32c3: Apply one-liner/small changes for ESP32-C3 il y a 5 ans
task_wdt.c a90f29fced wdt: Updates il y a 4 ans

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.