esp-idf/components/esp_system
morris 483149e41b global: fix some potential out-of-bounds issue
...that found by Coverity Scan
2022-04-08 11:05:43 +08:00
..
include Remove IRAM_ATTR from any function declarations 2022-03-22 09:58:50 +00:00
ld cache/mmu: implememnt cache and mmu hal APIs in bootloader 2022-03-11 22:43:11 +08:00
port Merge branch 'bugfix/remove_ref_non_ex_options' into 'master' 2022-03-25 18:02:54 +08:00
test Merge branch 'bugfix/ipc_blocking' into 'master' 2022-03-31 13:28:39 +08:00
test_eh_frame_parser esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
CMakeLists.txt hw_support: move periph_ctrl from driver to hw_support 2022-03-29 11:53:31 +08:00
crosscore_int.c This commit add to GDBstup: 2022-03-01 19:49:24 +03:00
debug_stubs.c debug_stubs: Refactor and add support for RISCV 2021-11-04 01:33:24 +03:00
eh_frame_parser.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
esp_err.c esp_common: move esp_err 2021-02-24 12:16:37 +08:00
esp_ipc.c global: fix some potential out-of-bounds issue 2022-04-08 11:05:43 +08:00
esp_system.c freertos: Fix usage of vTaskSuspendAll()/xTaskResumeAll() 2022-03-08 14:59:18 +08:00
fpga_overrides.c ESP8684: add freertos, hal, esp_system support 2021-11-06 17:33:44 +08:00
freertos_hooks.c esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies 2022-03-22 11:19:32 +08:00
int_wdt.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
Kconfig Merge branch 'feature/gdbstub_rt_multicore' into 'master' 2022-03-17 19:59:29 +08:00
linker.lf system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00
panic.c esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies 2022-03-22 11:19:32 +08:00
README.md esp_system: add notes on timekeeping 2021-03-25 16:09:33 +08:00
sdkconfig.rename system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32c3 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32h2 kconfig: also parse target specific sdkconfig.rename.TARGET files 2022-01-31 11:36:08 +08:00
sdkconfig.rename.esp32s2 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
sdkconfig.rename.esp32s3 system: move kconfig options out of target component 2022-03-02 01:22:26 +00:00
stack_check.c esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
startup.c esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies 2022-03-22 11:19:32 +08:00
system_time.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
task_wdt.c freertos: Remove legacy data types 2022-02-09 23:05:45 +08:00
ubsan.c esp_system: fix ubsan builtins' prototypes to suppress Wbuiltin-declaration-mismatch 2022-03-14 09:31:00 +00:00
xt_wdt.c WDT: Add support for XTAL32K Watchdog timer 2021-09-02 09:09:00 +08:00

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.