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esp-idf/components/esp_system
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morris fb7cc00378 Merge branch 'refactor/reorganize_the_interrupt_description_files' into 'master' 
refactor(interrupt): Put the interrupts definitions in soc/interrupts.h

Closes IDF-5776

See merge request espressif/esp-idf!24578
2023-07-19 12:05:56 +08:00
..
include System: remove digital-system reset within OS restart when Memprot on 2023-06-26 20:22:59 +02:00
ld esp32p4: introduce the target 2023-06-13 15:16:11 +08:00
port refactor(interrupt):put the interrupts definitions in soc/interrupts.h 2023-07-17 19:31:56 +08:00
task_wdt esp_system: Fix TIMG0 still enabled after Timer is freed 2023-03-06 04:58:11 +00:00
test_apps ci: add pd_vddsdio in lightsleep UT tests 2023-07-14 21:21:23 +08:00
test_eh_frame_parser System: implement libunwind library for RISC-V backtracing 2023-05-15 11:19:03 +08:00
.build-test-rules.yml ci: fix invalid kconfig options in system test apps 2023-05-09 11:27:55 +08:00
app.lf esp32: move common fragment definitions 2021-03-31 19:17:33 +08:00
check_system_init_priorities.py esp_system: add a script to check the startup priorities 2022-07-12 16:58:14 +02:00
CMakeLists.txt feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
crosscore_int.c esp32h4: checked all the corner stuffs of the removal 2023-04-23 12:03:07 +00:00
debug_stubs.c esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00
eh_frame_parser.c System: implement libunwind library for RISC-V backtracing 2023-05-15 11:19:03 +08:00
esp_err.c feature: add ram loadable app support 2023-02-01 17:57:22 +08:00
esp_ipc.c esp_ipc: Use task notifications instead of semaphores 2023-01-10 05:11:31 +08:00
esp_system.c System: remove digital-system reset within OS restart when Memprot on 2023-06-26 20:22:59 +02:00
fpga_overrides.c esp32h4: removed esp32h4 related codes 2023-04-23 12:03:07 +00:00
freertos_hooks.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
hw_stack_guard.c feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
int_wdt.c wdt: add support for H2 2023-02-23 11:22:51 +08:00
Kconfig feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
linker.lf feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
panic.c esp_app_format: IRAM space optimization 2023-05-17 23:40:59 +08:00
README.md brownout: Disable the hardware BOD when BOD interrupt is enabled 2023-04-21 10:22:59 +08:00
sdkconfig.rename TWDT: Use the new TWDT Kconfig options in the examples and tests 2023-02-17 11:22:25 +08:00
sdkconfig.rename.esp32 kconfig: move remaining kconfig options out of target component 2022-05-23 17:57:45 +08:00
sdkconfig.rename.esp32c3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s2 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
stack_check.c esp_system: fix placement of __stack_chk_fail from flash to RAM 2022-12-07 08:49:12 +01:00
startup.c efuse: add efuse hal api 2023-04-18 13:47:00 +05:30
system_init_fn.txt feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
system_time.c esp32h4: removed esp32h4 related codes 2023-04-23 12:03:07 +00:00
systick_etm.c systimer: assign counter and alarm in esp_hw_support 2023-01-10 17:05:49 +08:00
ubsan.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
xt_wdt.c esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00

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.

Brownout

on some boards, we name BOD1 as ana_bod, to unify the usage, using BOD1 in following passage.

BOD1 will be a little faster then BOD0, but BOD0 can be widely used(can reset rf, flash, or using interrupt, etc.) So, in IDF code, we use BOD1 in bootloader and BOD0 in the app.