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esp-idf/components/esp_system
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Armando 2d44dc1eed mmu: driver framework, for vaddr maintenance 
This commit gives basic mmu driver framework. Now it is able to maintain
mmu virtual address usage on esp32, esp32s2 and esp32s3. Usage to
external virtual address should rely on mmu functions to know which
address range is available, instead of hardcoded.

This commit also improves psram memory that is added to the heap
allocator. Now it's added to the heap, according to the memory
alignment.

Closes https://github.com/espressif/esp-idf/issues/8295
2022-08-26 17:59:06 +08:00
..
include feat (esp_system): simple os abstraction layer for critical sections 2022-08-17 10:04:35 +02:00
ld mmu: driver framework, for vaddr maintenance 2022-08-26 17:59:06 +08:00
port esp32c6: introduce the target 2022-08-19 11:13:02 +08:00
test uart: move frequency of clock sources out of HAL 2022-08-15 18:55:43 +00:00
test_apps docs: changes docs supported targets tables 2022-07-14 08:26:32 +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
.build-test-rules.yml feat: use standalone project idf-build-apps for find/build apps utils 2022-07-14 08:26:31 +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 esp_app_format: Fixed build errors and resolved dependencies 2022-08-17 10:59:31 +05:30
crosscore_int.c Task WDT: Interuptee task stack is now used for backtracing, regardless of the CPU core 2022-08-02 12:41:14 +08:00
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_system: fix address printed by ESP_ERROR_CHECK 2022-07-12 17:01:47 +02:00
esp_ipc.c ipc: Increase stacksize when compiling with -O0 2022-07-18 13:55:03 +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 hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
int_wdt.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
Kconfig kconfig: refactor xtal freq kconfig to common configuration item 2022-08-05 19:12:29 +08:00
linker.lf esp_system: usb_console: fix restart when Wi-Fi is working 2022-07-28 17:15:03 +02:00
panic.c esp_app_format: Fixed build errors and resolved dependencies 2022-08-17 10:59:31 +05:30
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 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.esp32h2 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_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
startup.c newlib: Add workaround for printf functions using 32-bit time_t on first call 2022-08-21 15:27:50 +08:00
system_init_fn.txt esp_system: usb_console: fix restart when Wi-Fi is working 2022-07-28 17:15:03 +02:00
system_time.c esp8684: rename target to esp32c2 2022-01-19 11:08:57 +08:00
task_wdt.c Task WDT: Interuptee task stack is now used for backtracing, regardless of the CPU core 2022-08-02 12:41:14 +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 bugfix (esp_system): made xt_wdt spinlock static 2022-07-22 08:17:59 +00:00

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.