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esp-idf
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components
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esp_system
Ivan Grokhotkov 249abb3fe8 esp_timer: allow querying the timer before esp_timer_init is called 4 anni fa
..
include 4869b3cd4a WDT: Add support for XTAL32K Watchdog timer 4 anni fa
ld 881e1b0fd5 deep sleep: add deep sleep support for esp32s3 4 anni fa
port 111ba5bbe6 trax: Adds ESP32-S3 support 4 anni fa
test d6f2fa4bab freertos: Remove critical nested macros 4 anni fa
test_eh_frame_parser 0771bd1711 espsystem: Rearchitecture and fix eh_frame_parser bugs 4 anni fa
CMakeLists.txt 4869b3cd4a WDT: Add support for XTAL32K Watchdog timer 4 anni fa
Kconfig 111ba5bbe6 trax: Adds ESP32-S3 support 4 anni fa
Makefile.projbuild b06dba7823 esp32: move app linker scripts 4 anni fa
README.md 32aa5f7e25 esp_system: add notes on timekeeping 4 anni fa
app.lf bbc599493e esp32: move common fragment definitions 4 anni fa
component.mk 265038bea3 esp_system: fix high level interrupt handler not linked for GNU Make 4 anni fa
crosscore_int.c 5e3689ae0f esp32h2: update esp_system and esp_hw_support to support esp32h2 4 anni fa
dbg_stubs.c 2a5d0a041e gcov: add stub table size entry 4 anni fa
eh_frame_parser.c 0771bd1711 espsystem: Rearchitecture and fix eh_frame_parser bugs 4 anni fa
esp_err.c c16ceafa5c esp_common: move esp_err 5 anni fa
esp_system.c c19b37d2a9 esp_system: Adds sync of FRC & RTC counters in esp_restart 4 anni fa
fpga_overrides.c 1a626ef6ca esp32: App can boot on FPGA image 4 anni fa
freertos_hooks.c 0e0914476c esp_common: move freertos hooks 5 anni fa
int_wdt.c e2275b1f63 gptimer: clean up hal and ll for driver-ng 4 anni fa
linker.lf 9069f70db3 system: add option to enable undefined behavior sanitizer (UBSAN) 4 anni fa
panic.c b5606f5e81 esp_system: make the abort operation compatible with clang 4 anni fa
sdkconfig.rename 5e3689ae0f esp32h2: update esp_system and esp_hw_support to support esp32h2 4 anni fa
stack_check.c 6e80811ca2 log: Remove redundant definition of LOG_LOCAL_LEVEL 4 anni fa
startup.c 249abb3fe8 esp_timer: allow querying the timer before esp_timer_init is called 4 anni fa
system_time.c 5e3689ae0f esp32h2: update esp_system and esp_hw_support to support esp32h2 4 anni fa
task_wdt.c e2275b1f63 gptimer: clean up hal and ll for driver-ng 4 anni fa
ubsan.c 9069f70db3 system: add option to enable undefined behavior sanitizer (UBSAN) 4 anni fa
xt_wdt.c 4869b3cd4a WDT: Add support for XTAL32K Watchdog timer 4 anni fa

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.