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Kconfig: add more help info for pm related options help

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wuzhenghui 2023-05-08 15:11:22 +08:00
parent 5c74093300
commit 388746ca31
2 changed files with 10 additions and 1 deletions
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8
components/esp_pm/Kconfig
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@ -138,13 +138,19 @@ menu "Power Management"
context of the necessary hardware for FreeRTOS to run, it will need at least 4.55 KB free heap
at sleep time. Otherwise sleep will not power down the peripherals.
Note: Please use this option with caution, the current IDF does not support the retention of
Note1: Please use this option with caution, the current IDF does not support the retention of
all peripherals. When the digital peripherals are powered off and a sleep and wake-up is completed,
the peripherals that have not saved the running context are equivalent to performing a reset.
!!! Please confirm the peripherals used in your application and their sleep retention support status
before enabling this option, peripherals sleep retention driver support status is tracked in
power_management.rst
Note2: When this option is enabled simultaneously with FREERTOS_USE_TICKLESS_IDLE, since the UART will
be powered down, the uart FIFO will be flushed before sleep to avoid data loss, however, this has the
potential to block the sleep process and cause the wakeup time to be skipped, which will cause the tick
of freertos to not be compensated correctly when returning from sleep and cause the system to crash.
To avoid this, you can increase FREERTOS_IDLE_TIME_BEFORE_SLEEP threshold in menuconfig.
config PM_UPDATE_CCOMPARE_HLI_WORKAROUND
bool
default y if PM_ENABLE && BTDM_CTRL_HLI

3
components/freertos/Kconfig
View File

@ -271,6 +271,9 @@ menu "FreeRTOS"
# Minimal value is 2 because of a check in FreeRTOS.h (search configEXPECTED_IDLE_TIME_BEFORE_SLEEP)
help
FreeRTOS will enter light sleep mode if no tasks need to run for this number of ticks.
You can enable PM_PROFILING feature in esp_pm components and dump the sleep status with
esp_pm_dump_locks, if the proportion of rejected sleeps is too high, please increase
this value to improve scheduling efficiency
endmenu # Kernel