esp-idf/components/esp_system
Shu Chen f8f9e545e8 Merge branch 'feature/support_esp32h2_hw_support' into 'master'
Feature/support esp32h2 hw support

Closes IDF-3378 and IDF-3396

See merge request espressif/esp-idf!14545
2021-08-26 06:00:27 +00:00
..
include Merge branch 'optimization/config_option_LWIP_TCPIP_CORE_LOCKING' into 'master' 2021-08-25 08:52:43 +00:00
ld Adjust the variable name & 2021-08-25 16:06:28 +08:00
port Merge branch 'feature/support_esp32h2_hw_support' into 'master' 2021-08-26 06:00:27 +00:00
test esp32: move remaining tests 2021-07-16 20:14:27 +08:00
test_eh_frame_parser espsystem: Rearchitecture and fix eh_frame_parser bugs 2021-07-15 12:47:51 +08:00
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
CMakeLists.txt esp_common: Add API for IPC to run small pieces of code on the other CPU, in the context of the level 4 interrupt 2021-08-03 14:35:29 +08:00
component.mk esp32: move app linker scripts 2021-07-16 20:14:27 +08:00
crosscore_int.c esp32h2: update esp_system and esp_hw_support to support esp32h2 2021-07-01 19:53:11 +08:00
dbg_stubs.c gcov: add stub table size entry 2021-08-20 15:00:55 +08:00
eh_frame_parser.c espsystem: Rearchitecture and fix eh_frame_parser bugs 2021-07-15 12:47:51 +08:00
esp_err.c esp_common: move esp_err 2021-02-24 12:16:37 +08:00
esp_system.c esp_system: Adds sync of FRC & RTC counters in esp_restart 2021-07-21 10:23:24 +05:00
fpga_overrides.c esp32: App can boot on FPGA image 2021-07-16 10:50:06 +10:00
freertos_hooks.c esp_common: move freertos hooks 2021-02-24 12:16:37 +08:00
int_wdt.c esp_common: move task, int wdt 2021-02-24 12:16:37 +08:00
Kconfig esp_common: Add API for IPC to run small pieces of code on the other CPU, in the context of the level 4 interrupt 2021-08-03 14:35:29 +08:00
linker.lf system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00
Makefile.projbuild esp32: move app linker scripts 2021-07-16 20:14:27 +08:00
panic.c Update tests for assert and abort 2021-08-05 11:09:22 +05:30
README.md esp_system: add notes on timekeeping 2021-03-25 16:09:33 +08:00
sdkconfig.rename esp32h2: update esp_system and esp_hw_support to support esp32h2 2021-07-01 19:53:11 +08:00
stack_check.c log: Remove redundant definition of LOG_LOCAL_LEVEL 2021-04-23 18:13:04 +10:00
startup.c esp32h2: add rtc clock support 2021-08-26 11:25:39 +08:00
system_time.c esp32h2: update esp_system and esp_hw_support to support esp32h2 2021-07-01 19:53:11 +08:00
task_wdt.c esp32h2: update esp_system and esp_hw_support to support esp32h2 2021-07-01 19:53:11 +08:00
ubsan.c system: add option to enable undefined behavior sanitizer (UBSAN) 2021-04-22 23:33:45 +02:00

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.