esp-idf/components/esp32/Kconfig

menu "ESP32-specific config"

choice ESP32_DEFAULT_CPU_FREQ_MHZ
    prompt "CPU frequency"
    default ESP32_DEFAULT_CPU_FREQ_240
    help
        CPU frequency to be set on application startup.

config ESP32_DEFAULT_CPU_FREQ_80
    bool "80 MHz"
config ESP32_DEFAULT_CPU_FREQ_160
    bool "160 MHz"
config ESP32_DEFAULT_CPU_FREQ_240
    bool "240 MHz"
endchoice

config ESP32_DEFAULT_CPU_FREQ_MHZ
    int
    default 80 if ESP32_DEFAULT_CPU_FREQ_80
    default 160 if ESP32_DEFAULT_CPU_FREQ_160
    default 240 if ESP32_DEFAULT_CPU_FREQ_240

choice ESP32_WIFI_OR_BT
    prompt "Select stack to enable (WiFi or BT)"
    default ESP32_ENABLE_WIFI
    help
        Temporarily, WiFi and BT stacks can not be used at the same time.
        Select which stack to enable.

config ESP32_ENABLE_STACK_WIFI
    bool "WiFi"
    select WIFI_ENABLED if ESP32_ENABLE_STACK_WIFI
config ESP32_ENABLE_STACK_BT
    bool "BT"
    select MEMMAP_BT if ESP32_ENABLE_STACK_BT
    select BT_ENABLED if ESP32_ENABLE_STACK_BT
config ESP32_ENABLE_STACK_NONE
    bool "None"
endchoice

config MEMMAP_BT
    bool
    depends on ESP32_ENABLE_STACK_BT
    help
        The Bluetooth stack uses memory that cannot be used as generic memory anymore. This
        reserves the space for that within the memory map of the compiled binary.
        This option is required to enable BT stack.
        Temporarily, this option is not compatible with WiFi stack.

config MEMMAP_SMP
    bool "Reserve memory for two cores"
    default "y"
    help
        The ESP32 contains two cores. If you plan to only use one, you can disable this item
        to save some memory. (ToDo: Make this automatically depend on unicore support)

config MEMMAP_TRACEMEM
    bool "Use TRAX tracing feature"
    default "n"
    help
        The ESP32 contains a feature which allows you to trace the execution path the processor
        has taken through the program. This is stored in a chunk of 32K (16K for single-processor)
        of memory that can't be used for general purposes anymore. Disable this if you do not know
        what this is.

# Memory to reverse for trace, used in linker script
config TRACEMEM_RESERVE_DRAM
    hex
    default 0x8000 if MEMMAP_TRACEMEM
    default 0x0

config MEMMAP_SPISRAM
    bool "Use external SPI SRAM chip as main memory"
    default "n"
    help
        The ESP32 can control an external SPI SRAM chip, adding the memory it contains to the 
        main memory map. Enable this if you have this hardware and want to use it in the same
        way as on-chip RAM.

config WIFI_ENABLED
    bool
    default "y"
    depends on ESP32_ENABLE_STACK_WIFI
    help
        This compiles in the low-level WiFi stack.

        Temporarily, this option is not compatible with BT stack.

config SYSTEM_EVENT_QUEUE_SIZE
    int "System event queue size"
    default 32
    help
        Config system event queue size in different application.

config SYSTEM_EVENT_TASK_STACK_SIZE
    int "Event loop task stack size"
    default 2048
    help
        Config system event task stack size in different application.


config MAIN_TASK_STACK_SIZE
    int "Main task stack size"
    default 4096
    help
        Config system event task stack size in different application.


config NEWLIB_STDOUT_ADDCR
    bool "Standard-out output adds carriage return before newline"
    default y
    help
        Most people are used to end their printf strings with a newline. If this
        is sent as is to the serial port, most terminal programs will only move the
        cursor one line down, not also move it to the beginning of the line. This
        is usually done by an added CR character. Enabling this will make the
        standard output code automatically add a CR character before a LF.

config ULP_COPROC_ENABLED
    bool "Enable Ultra Low Power (ULP) Coprocessor"
    default "n"
    help
        Set to 'y' if you plan to load a firmware for the coprocessor.

        If this option is enabled, further coprocessor configuration will appear in the Components menu.

config ULP_COPROC_RESERVE_MEM
    int "RTC slow memory reserved for coprocessor"
    default 512
    range 32 8192
    depends on ULP_COPROC_ENABLED
    help
        Bytes of memory to reserve for ULP coprocessor firmware & data.

        Data is reserved at the beginning of RTC slow memory.

# Set CONFIG_ULP_COPROC_RESERVE_MEM to 0 if ULP is disabled
config ULP_COPROC_RESERVE_MEM
    int
    default 0
    depends on !ULP_COPROC_ENABLED

menu "Watchdogs & brown-out detection"

config INT_WDT
    bool "Interrupt watchdog"
    default y
    help
        This watchdog timer can detect if the FreeRTOS tick interrupt has not been called for a certain time,
        either because a task turned off interrupts and did not turn them on for a long time, or because an
        interrupt handler did not return. It will try to invoke the panic handler first and failing that
        reset the SoC.

config INT_WDT_TIMEOUT_MS
    int "Interrupt watchdog timeout (ms)"
    depends on INT_WDT
    default 10
    range INT_WDT_TIMEOUT_MIN 10000
    help
        The timeout of the watchdog, in miliseconds. Make this higher than the FreeRTOS tick rate.

config TASK_WDT
    bool "Task watchdog"
    default y
    help
        This watchdog timer can be used to make sure individual tasks are still running.

config TASK_WDT_PANIC
    bool "Invoke panic handler when Task Watchdog is triggered"
    depends on TASK_WDT
    default n
    help
        Normally, the Task Watchdog will only print out a warning if it detects it has not
        been fed. If this is enabled, it will invoke the panic handler instead, which
        can then halt or reboot the chip.

config TASK_WDT_TIMEOUT_S
    int "Task watchdog timeout (seconds)"
    depends on TASK_WDT
    range 1 60
    default 5
    help
        Timeout for the task WDT, in seconds.

config TASK_WDT_CHECK_IDLE_TASK
    bool "Task watchdog watches idle tasks"
    depends on TASK_WDT
    default y
    help
        With this turned on, the task WDT can detect if the idle task is not called within the task
        watchdog timeout period. The idle task not being called usually is a symptom of another
        task hoarding the CPU. It is also a bad thing because FreeRTOS household tasks depend on the 
        idle task getting some runtime every now and then.

config BROWNOUT_DET
    bool "Hardware brownout detect & reset"
    default y
    help
        The ESP32 has a built-in brownout detector which can detect if the voltage is lower than 
        a specific value. If this happens, it will reset the chip in order to prevent unintended
        behaviour.

choice BROWNOUT_DET_LVL_SEL
    prompt "Brownout voltage level"
    depends on BROWNOUT_DET
    default BROWNOUT_DET_LVL_SEL_25
    help
        The brownout detector will reset the chip when the supply voltage is below this level.

config BROWNOUT_DET_LVL_SEL_0
    bool "2.1V"
config BROWNOUT_DET_LVL_SEL_1
    bool "2.2V"
config BROWNOUT_DET_LVL_SEL_2
    bool "2.3V"
config BROWNOUT_DET_LVL_SEL_3
    bool "2.4V"
config BROWNOUT_DET_LVL_SEL_4
    bool "2.5V"
config BROWNOUT_DET_LVL_SEL_5
    bool "2.6V"
config BROWNOUT_DET_LVL_SEL_6
    bool "2.7V"
config BROWNOUT_DET_LVL_SEL_7
    bool "2.8V"
endchoice

config BROWNOUT_DET_LVL
    int
    default 0 if BROWNOUT_DET_LVL_SEL_0
    default 1 if BROWNOUT_DET_LVL_SEL_1
    default 2 if BROWNOUT_DET_LVL_SEL_2
    default 3 if BROWNOUT_DET_LVL_SEL_3
    default 4 if BROWNOUT_DET_LVL_SEL_4
    default 5 if BROWNOUT_DET_LVL_SEL_5
    default 6 if BROWNOUT_DET_LVL_SEL_6
    default 7 if BROWNOUT_DET_LVL_SEL_7


config BROWNOUT_DET_RESETDELAY
    int "Brownout reset delay (in uS)"
    depends on BROWNOUT_DET
    range 0 6820
    default 1000
    help
        The brownout detector can reset the chip after a certain delay, in order to make sure e.g. a voltage dip has entirely passed
        before trying to restart the chip. You can set the delay here.

endmenu



endmenu