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esp_system
Angus Gratton 059353b0c2 Merge branch 'feature/refactor_common_secure_boot_code' into 'master' %!s(int64=4) %!d(string=hai) anos
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include dc6b950257 doc: Add performance guides for execuion speed, binary size, RAM usage %!s(int64=4) %!d(string=hai) anos
port f124536948 system: add support for reset reason hint on S3 %!s(int64=4) %!d(string=hai) anos
test c112bd8b57 esp_system: move intr_alloc %!s(int64=4) %!d(string=hai) anos
CMakeLists.txt 6061a547e5 esp_phy: decouple esp_phy component from esp_wifi and bt %!s(int64=4) %!d(string=hai) anos
Kconfig 7bb91f912c gdbstub component %!s(int64=4) %!d(string=hai) anos
README.md 32aa5f7e25 esp_system: add notes on timekeeping %!s(int64=4) %!d(string=hai) anos
app.lf bbc599493e esp32: move common fragment definitions %!s(int64=4) %!d(string=hai) anos
component.mk 6061a547e5 esp_phy: decouple esp_phy component from esp_wifi and bt %!s(int64=4) %!d(string=hai) anos
crosscore_int.c 393bd64a1e esp32: move crosscore int %!s(int64=4) %!d(string=hai) anos
dbg_stubs.c 6e80811ca2 log: Remove redundant definition of LOG_LOCAL_LEVEL %!s(int64=4) %!d(string=hai) anos
esp_err.c c16ceafa5c esp_common: move esp_err %!s(int64=5) %!d(string=hai) anos
esp_system.c a7bac58480 esp32: move system api to esp_system %!s(int64=4) %!d(string=hai) anos
fpga_overrides.c 349f0cad3e esp_common: other movements %!s(int64=5) %!d(string=hai) anos
freertos_hooks.c 0e0914476c esp_common: move freertos hooks %!s(int64=5) %!d(string=hai) anos
int_wdt.c deaad431f4 esp_common: move task, int wdt %!s(int64=5) %!d(string=hai) anos
linker.lf 9069f70db3 system: add option to enable undefined behavior sanitizer (UBSAN) %!s(int64=4) %!d(string=hai) anos
panic.c 00a7ecb5a3 Code cleanup. Bugfix after rebase with master. Formating. %!s(int64=4) %!d(string=hai) anos
sdkconfig.rename 51e66d0f82 esp_common: move configs %!s(int64=5) %!d(string=hai) anos
stack_check.c 6e80811ca2 log: Remove redundant definition of LOG_LOCAL_LEVEL %!s(int64=4) %!d(string=hai) anos
startup.c f339b3fc96 efuse(esp32): Deprecate esp_efuse_burn_new_values() & esp_efuse_write_random_key() %!s(int64=4) %!d(string=hai) anos
system_time.c 5228d9f9ce esp32c3: Apply one-liner/small changes for ESP32-C3 %!s(int64=5) %!d(string=hai) anos
task_wdt.c a90f29fced wdt: Updates %!s(int64=5) %!d(string=hai) anos
ubsan.c 9069f70db3 system: add option to enable undefined behavior sanitizer (UBSAN) %!s(int64=4) %!d(string=hai) anos

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.