Chapter 2. API Reference
CONFIG_PM_RTOS_IDLE_OPT
Put RTOS IDLE related codes in internal RAM
Found in: Component config > Power Management
If enabled, about 260B of RTOS_IDLE related source code would be in IRAM and chip would sleep
longer for 40us at most each time. This feature is intended to be used when lower power consumption
is needed while there is enough place in IRAM to place source code.
CONFIG_PM_SLP_DISABLE_GPIO
Disable all GPIO when chip at sleep
Found in: Component config > Power Management
This feature is intended to disable all GPIO pins at automantic sleep to get a lower power mode.
If enabled, chips will disable all GPIO pins at automantic sleep to reduce about 200~300 uA cur-
rent. If you want to specifically use some pins normally as chip wakes when chip sleeps, you
can call ‘gpio_sleep_sel_dis’to disable this feature on those pins. You can also keep this fea-
ture on and call ‘gpio_sleep_set_direction’and ‘gpio_sleep_set_pull_mode’to have a different
GPIO configuration at sleep. Waring: If you want to enable this option on ESP32, you should en-
able GPIO_ESP32_SUPPORT_SWITCH_SLP_PULL at first, otherwise you will not be able to switch
pullup/pulldown mode.
ESP System Settings Contains:
• CONFIG_ESP_SYSTEM_RTC_EXT_XTAL_BOOTSTRAP_CYCLES
• CONFIG_ESP_CONSOLE_UART
• CONFIG_ESP_CONSOLE_USB_CDC_SUPPORT_ETS_PRINTF
• CONFIG_ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP
• CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE
• CONFIG_ESP_TASK_WDT
• CONFIG_ESP_XT_WDT
• CONFIG_ESP_SYSTEM_CHECK_INT_LEVEL
• CONFIG_ESP_INT_WDT
• CONFIG_ESP_MAIN_TASK_AFFINITY
• CONFIG_ESP_MAIN_TASK_STACK_SIZE
• Memory protection
• CONFIG_ESP_MINIMAL_SHARED_STACK_SIZE
• CONFIG_ESP_SYSTEM_PANIC
• CONFIG_ESP_PANIC_HANDLER_IRAM
• CONFIG_ESP_CONSOLE_USB_CDC_RX_BUF_SIZE
• CONFIG_ESP_SYSTEM_EVENT_QUEUE_SIZE
• CONFIG_ESP_CONSOLE_UART_BAUDRATE
• CONFIG_ESP_CONSOLE_UART_NUM
• CONFIG_ESP_CONSOLE_UART_RX_GPIO
• CONFIG_ESP_CONSOLE_UART_TX_GPIO
CONFIG_ESP_SYSTEM_PANIC
Panic handler behaviour
Found in: Component config > ESP System Settings
If FreeRTOS detects unexpected behaviour or an unhandled exception, the panic handler is invoked.
Configure the panic handler’s action here.
Available options:
• Print registers and halt (ESP_SYSTEM_PANIC_PRINT_HALT)
Outputs the relevant registers over the serial port and halt the processor. Needs a manual reset
to restart.
Espressif Systems 1119
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