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esp-idf
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components
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esp_system
Alexey Lapshin 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
..
include 65bc1ed055 System: remove digital-system reset within OS restart when Memprot on 2 年 前
ld 101e6a18eb esp32p4: introduce the target 2 年 前
port 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
task_wdt 2a2bd0f8ff esp_system: Fix TIMG0 still enabled after Timer is freed 2 年 前
test_apps 7fd74057a3 example: bringup light sleep example for esp32h2 2 年 前
test_eh_frame_parser eeaa40f71d System: implement libunwind library for RISC-V backtracing 2 年 前
.build-test-rules.yml a300b3eb81 ci: fix invalid kconfig options in system test apps 2 年 前
CMakeLists.txt 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
Kconfig 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
README.md a3d962d89a brownout: Disable the hardware BOD when BOD interrupt is enabled 2 年 前
app.lf bbc599493e esp32: move common fragment definitions 4 年 前
check_system_init_priorities.py 42654927d5 esp_system: add a script to check the startup priorities 3 年 前
crosscore_int.c 49f16eefbb esp32h4: checked all the corner stuffs of the removal 2 年 前
debug_stubs.c fb7aafd348 esp_system: fix and reenable no-format warning 2 年 前
eh_frame_parser.c eeaa40f71d System: implement libunwind library for RISC-V backtracing 2 年 前
esp_err.c 44df5b31af feature: add ram loadable app support 3 年 前
esp_ipc.c 23a290f29f esp_ipc: Use task notifications instead of semaphores 3 年 前
esp_system.c 65bc1ed055 System: remove digital-system reset within OS restart when Memprot on 2 年 前
fpga_overrides.c bf2a7b2df6 esp32h4: removed esp32h4 related codes 2 年 前
freertos_hooks.c 6005cc9163 hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 3 年 前
hw_stack_guard.c 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
int_wdt.c 5d26a0de9a wdt: add support for H2 2 年 前
linker.lf 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
panic.c b605404b06 esp_app_format: IRAM space optimization 2 年 前
sdkconfig.rename 5e5343d429 TWDT: Use the new TWDT Kconfig options in the examples and tests 3 年 前
sdkconfig.rename.esp32 0687daf2c8 kconfig: move remaining kconfig options out of target component 3 年 前
sdkconfig.rename.esp32c3 d2872095f9 soc: moved kconfig options out of the target component. 3 年 前
sdkconfig.rename.esp32s2 d2872095f9 soc: moved kconfig options out of the target component. 3 年 前
sdkconfig.rename.esp32s3 d2872095f9 soc: moved kconfig options out of the target component. 3 年 前
stack_check.c 4d16f46a88 esp_system: fix placement of __stack_chk_fail from flash to RAM 3 年 前
startup.c c3e701588e efuse: add efuse hal api 2 年 前
system_init_fn.txt 4df3ff619e feat(esp_system): implement hw stack guard for riscv chips 2 年 前
system_time.c bf2a7b2df6 esp32h4: removed esp32h4 related codes 2 年 前
systick_etm.c 6c1d98d556 systimer: assign counter and alarm in esp_hw_support 3 年 前
ubsan.c 6005cc9163 hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 3 年 前
xt_wdt.c fb7aafd348 esp_system: fix and reenable no-format warning 2 年 前

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.