esp-idf/components/esp32/Kconfig

menu "ESP32-specific"

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

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.

config MEMMAP_TRACEMEM_TWOBANKS
    bool "Reserve memory for tracing both pro as well as app cpu execution"
    default "n"
    depends on MEMMAP_TRACEMEM && MEMMAP_SMP
    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 && MEMMAP_TRACEMEM_TWOBANKS
    default 0x4000 if MEMMAP_TRACEMEM && !MEMMAP_TRACEMEM_TWOBANKS
    default 0x0

choice ESP32_COREDUMP_TO_FLASH_OR_UART
    prompt "Core dump destination"
    default ESP32_ENABLE_COREDUMP_TO_NONE
    help
        Select place to store core dump: flash, uart or none (to disable core dumps generation).

        If core dump is configured to be stored in flash and custom partition table is used add 
        corresponding entry to your CSV. For examples, please see predefined partition table CSV descriptions 
        in the components/partition_table directory.

config ESP32_ENABLE_COREDUMP_TO_FLASH
    bool "Flash"
    select ESP32_ENABLE_COREDUMP
config ESP32_ENABLE_COREDUMP_TO_UART
    bool "UART"
    select ESP32_ENABLE_COREDUMP
config ESP32_ENABLE_COREDUMP_TO_NONE
    bool "None"
endchoice

config ESP32_ENABLE_COREDUMP
    bool
    default F
    help
        Enables/disable core dump module.

config ESP32_CORE_DUMP_UART_DELAY
    int "Core dump print to UART delay"
    depends on ESP32_ENABLE_COREDUMP_TO_UART
    default 0
    help
        Config delay (in ms) before printing core dump to UART.
        Delay can be interrupted by pressing Enter key.

config ESP32_CORE_DUMP_LOG_LEVEL
    int "Core dump module logging level"
    depends on ESP32_ENABLE_COREDUMP
    default 1
    help
        Config core dump module logging level (0-5).

# Not implemented and/or needs new silicon rev to work
config MEMMAP_SPISRAM
    bool "Use external SPI SRAM chip as main memory"
    depends on ESP32_NEEDS_NEW_SILICON_REV
    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.

choice NUMBER_OF_MAC_ADDRESS_GENERATED_FROM_EFUSE
    bool "Number of MAC address generated from the hardware MAC address in efuse"
    default FOUR_MAC_ADDRESS_FROM_EFUSE
    help
        Config the number of MAC address which is generated from the hardware MAC address in efuse.
        If the number is two, the MAC addresses of WiFi station and bluetooth are generated from
        the hardware MAC address in efuse. The MAC addresses of WiFi softap and ethernet are derived
        from that of WiFi station and bluetooth respectively. 
        If the number is four, the MAC addresses of WiFi station, WiFi softap, bluetooth and ethernet
        are all generated from the hardware MAC address in efuse.

config TWO_MAC_ADDRESS_FROM_EFUSE
    bool "Two"
config FOUR_MAC_ADDRESS_FROM_EFUSE
    bool "Four"
endchoice

config NUMBER_OF_MAC_ADDRESS_GENERATED_FROM_EFUSE
    int 
    default 2 if TWO_MAC_ADDRESS_FROM_EFUSE 
    default 4 if FOUR_MAC_ADDRESS_FROM_EFUSE 

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 4096
    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.
        
        With this option enabled, C standard library functions which read from UART 
        (like scanf) will convert "\r\n" character sequences back to "\n".
        
        This option doesn't affect behavior of the UART driver (drivers/uart.h).

config NEWLIB_NANO_FORMAT
    bool "Enable 'nano' formatting options for printf/scanf family"
    default n
    help
        ESP32 ROM contains parts of newlib C library, including printf/scanf family
        of functions. These functions have been compiled with so-called "nano"
        formatting option. This option doesn't support 64-bit integer formats and C99
        features, such as positional arguments.

        For more details about "nano" formatting option, please see newlib readme file,
        search for '--enable-newlib-nano-formatted-io':
        https://sourceware.org/newlib/README

        If this option is enabled, build system will use functions available in
        ROM, reducing the application binary size. Functions available in ROM run
        faster than functions which run from flash. Functions available in ROM can
        also run when flash instruction cache is disabled.

        If you need 64-bit integer formatting support or C99 features, keep this
        option disabled.

choice CONSOLE_UART
    prompt "UART for console output"
    default CONSOLE_UART_DEFAULT
    help
        Select whether to use UART for console output (through stdout and stderr).
        - Default is to use UART0 on pins GPIO1(TX) and GPIO3(RX).
        - If "Custom" is selected, UART0 or UART1 can be chosen,
          and any pins can be selected.
        - If "None" is selected, there will be no console output on any UART, except
          for initial output from ROM bootloader. This output can be further suppressed by
          bootstrapping GPIO13 pin to low logic level.

config CONSOLE_UART_DEFAULT
    bool "Default: UART0, TX=GPIO1, RX=GPIO3"
config CONSOLE_UART_CUSTOM
    bool "Custom"
config CONSOLE_UART_NONE
    bool "None"
endchoice

choice CONSOLE_UART_NUM
    prompt "UART peripheral to use for console output (0-1)"
    depends on CONSOLE_UART_CUSTOM
    default CONSOLE_UART_CUSTOM_NUM_0
    help
        Due of a ROM bug, UART2 is not supported for console output
        via ets_printf.

config CONSOLE_UART_CUSTOM_NUM_0
    bool "UART0"
config CONSOLE_UART_CUSTOM_NUM_1
    bool "UART1"
endchoice

config CONSOLE_UART_NUM
    int
    default 0 if CONSOLE_UART_DEFAULT || CONSOLE_UART_NONE
    default 0 if CONSOLE_UART_CUSTOM_NUM_0
    default 1 if CONSOLE_UART_CUSTOM_NUM_1

config CONSOLE_UART_TX_GPIO
    int "UART TX on GPIO#"
    depends on CONSOLE_UART_CUSTOM
    range 0 33
    default 19

config CONSOLE_UART_RX_GPIO
    int "UART RX on GPIO#"
    depends on CONSOLE_UART_CUSTOM
    range 0 39
    default 21

config CONSOLE_UART_BAUDRATE
    int "UART console baud rate"
    depends on !CONSOLE_UART_NONE
    default 115200
    range 1200 4000000

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


choice ESP32_PANIC
    prompt "Panic handler behaviour"
    default ESP32_PANIC_PRINT_REBOOT
    help
        If FreeRTOS detects unexpected behaviour or an unhandled exception, the panic handler is
        invoked. Configure the panic handlers action here.

config ESP32_PANIC_PRINT_HALT
    bool "Print registers and halt"
    help
        Outputs the relevant registers over the serial port and halt the
        processor. Needs a manual reset to restart.

config ESP32_PANIC_PRINT_REBOOT
    bool "Print registers and reboot"
    help
        Outputs the relevant registers over the serial port and immediately
        reset the processor.

config ESP32_PANIC_SILENT_REBOOT
    bool "Silent reboot"
    help
        Just resets the processor without outputting anything

config ESP32_PANIC_GDBSTUB
    bool "Invoke GDBStub"
    help
        Invoke gdbstub on the serial port, allowing for gdb to attach to it to do a postmortem
        of the crash.
endchoice

config ESP32_DEBUG_OCDAWARE
    bool "Make exception and panic handlers JTAG/OCD aware"
    default y
    help
        The FreeRTOS panic and unhandled exception handers can detect a JTAG OCD debugger and
        instead of panicking, have the debugger stop on the offending instruction.


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 300
    range 10 10000
    help
        The timeout of the watchdog, in miliseconds. Make this higher than the FreeRTOS tick rate.

config INT_WDT_CHECK_CPU1
    bool "Also watch CPU1 tick interrupt"
    depends on INT_WDT && !FREERTOS_UNICORE
    default y
    help
        Also detect if interrupts on CPU 1 are disabled for too long.

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 CPU0 idle task"
    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. Take Care: With this disabled, this
        watchdog will trigger if no tasks register themselves within the timeout value.

config TASK_WDT_CHECK_IDLE_TASK_CPU1
    bool "Task watchdog also watches CPU1 idle task"
    depends on TASK_WDT_CHECK_IDLE_TASK && !FREERTOS_UNICORE
    default y
    help
        Also check the idle task that runs on CPU1.

#The brownout detector code is disabled (by making it depend on a nonexisting symbol) because the current revision of ESP32
#silicon has a bug in the brown-out detector, rendering it unusable for resetting the CPU.
config BROWNOUT_DET
    bool "Hardware brownout detect & reset"
    default y
    depends on NEEDS_ESP32_NEW_SILICON_REV
    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.

#The voltage levels here are estimates, more work needs to be done to figure out the exact voltages
#of the brownout threshold levels.
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.


choice ESP32_TIME_SYSCALL
    prompt "Timers used for gettimeofday function"
    default ESP32_TIME_SYSCALL_USE_RTC_FRC1
    help
        This setting defines which hardware timers are used to
        implement 'gettimeofday' and 'time' functions in C library.

        - If only FRC1 timer is used, gettimeofday will provide time at
          microsecond resolution. Time will not be preserved when going
          into deep sleep mode.
        - If both FRC1 and RTC timers are used, timekeeping will
          continue in deep sleep. Time will be reported at 1 microsecond
          resolution.
        - If only RTC timer is used, timekeeping will continue in
          deep sleep, but time will be measured at 6.(6) microsecond
          resolution. Also the gettimeofday function itself may take
          longer to run.
        - If no timers are used, gettimeofday and time functions
          return -1 and set errno to ENOSYS.
        - When RTC is used for timekeeping, two RTC_STORE registers are
          used to keep time in deep sleep mode.

config ESP32_TIME_SYSCALL_USE_RTC
    bool "RTC"
config ESP32_TIME_SYSCALL_USE_RTC_FRC1
    bool "RTC and FRC1"
config ESP32_TIME_SYSCALL_USE_FRC1
    bool "FRC1"
config ESP32_TIME_SYSCALL_USE_NONE
    bool "None"
endchoice

choice ESP32_RTC_CLOCK_SOURCE
    prompt "RTC clock source"
    default ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC
    help
        Choose which clock is used as RTC clock source.
        The only available option for now is to use internal
        150kHz RC oscillator.

config ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC
    bool "Internal RC"
config ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
    bool "External 32kHz crystal"
    depends on DOCUMENTATION_FOR_RTC_CNTL
endchoice

config ESP32_DEEP_SLEEP_WAKEUP_DELAY
    int "Extra delay in deep sleep wake stub (in us)"
    default 0
    range 0 5000
    help
        When ESP32 exits deep sleep, the CPU and the flash chip are powered on
        at the same time. CPU will run deep sleep stub first, and then
        proceed to load code from flash. Some flash chips need sufficient
        time to pass between power on and first read operation. By default,
        without any extra delay, this time is approximately 900us.

        If you are using a flash chip which needs more than 900us to become
        ready after power on, set this parameter to add extra delay
        to the default deep sleep stub.

        If you are seeing "flash read err, 1000" message printed to the
        console after deep sleep reset, try increasing this value.

endmenu

menuconfig WIFI_ENABLED
    bool "WiFi"
    default y
    help
       Select this option to enable WiFi stack and show the submenu with WiFi configuration choices.

config SW_COEXIST_ENABLE
    bool "Software controls WiFi/Bluetooth coexistence"
    depends on WIFI_ENABLED && BT_ENABLED
    default n
    help
        If enabled, WiFi & Bluetooth coexistence is controlled by software rather than hardware.
        Recommended for heavy traffic scenarios. Both coexistence configuration options are
        automatically managed, no user intervention is required.


config ESP32_WIFI_STATIC_RX_BUFFER_NUM
    int "Max number of WiFi static RX buffers"
    depends on WIFI_ENABLED
    range 2 25
    default 10
    help
        Set the number of WiFi static rx buffers. Each buffer takes approximately 1.6KB of RAM.
        The static rx buffers are allocated when esp_wifi_init is called, they are not freed
        until esp_wifi_deinit is called. 
        WiFi hardware use these buffers to receive packets, generally larger number for higher
        throughput but more memory, smaller number for lower throughput but less memory.

config ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM
    int "Max number of WiFi dynamic RX buffers"
    depends on WIFI_ENABLED
    range 0 64
    default 0
    help
        Set the number of WiFi dynamic rx buffers, 0 means no limitation for dynamic rx buffer
        allocation. The size of dynamic rx buffers is not fixed.
        For each received packet in static rx buffers, WiFi driver makes a copy
        to dynamic rx buffers and then deliver it to high layer stack. The dynamic rx buffer
        is freed when the application, such as socket, successfully received the packet.
        For some applications, the WiFi driver receiving speed is faster than application 
        consuming speed, we may run out of memory if no limitation for the dynamic rx buffer
        number.  Generally the number of dynamic rx buffer should be no less than static
        rx buffer number if it is not 0. 

choice ESP32_WIFI_TX_BUFFER
    prompt "Type of WiFi TX buffers"
    depends on WIFI_ENABLED
    default ESP32_WIFI_DYNAMIC_TX_BUFFER
    help
        Select type of WiFi tx buffers and show the submenu with the number of WiFi tx buffers choice. 
        If "STATIC" is selected, WiFi tx buffers are allocated when WiFi is initialized and released
        when WiFi is de-initialized. If "DYNAMIC" is selected, WiFi tx buffer is allocated when tx
        data is delivered from LWIP to WiFi and released when tx data is sent out by WiFi.
        The size of each static tx buffers is fixed to about 1.6KB and the size of dynamic tx buffers is 
        depend on the length of the data delivered from LWIP.
        If PSRAM is enabled, "STATIC" should be selected to guarantee enough WiFi tx buffers. 
        If PSRAM is disabled, "DYNAMIC" should be selected to improve the utilization of RAM. 

config ESP32_WIFI_STATIC_TX_BUFFER
    bool "STATIC"
config ESP32_WIFI_DYNAMIC_TX_BUFFER
    bool "DYNAMIC"
endchoice

config ESP32_WIFI_TX_BUFFER_TYPE
    int
    depends on WIFI_ENABLED
    default 0 if ESP32_WIFI_STATIC_TX_BUFFER
    default 1 if ESP32_WIFI_DYNAMIC_TX_BUFFER

config ESP32_WIFI_STATIC_TX_BUFFER_NUM
    int "Max number of WiFi static TX buffers"
    depends on WIFI_ENABLED 
    depends on ESP32_WIFI_STATIC_TX_BUFFER
    range 16 64
    default 32
    help
        Set the number of WiFi static tx buffers. Each buffer takes approximately 1.6KB of RAM.
        The static rx buffers are allocated when esp_wifi_init is called, they are not released
        until esp_wifi_deinit is called.
        For each tx packet from high layer stack, WiFi driver make a copy of it. For some applications,
        especially the UDP application, the high layer deliver speed is faster than the WiFi tx
        speed, we may run out of static tx buffers. 

config ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM
    int "Max number of WiFi dynamic TX buffers"
    depends on WIFI_ENABLED 
    depends on ESP32_WIFI_DYNAMIC_TX_BUFFER
    range 16 64
    default 32
    help
        Set the number of WiFi dynamic tx buffers, 0 means no limitation for dynamic tx buffer
        allocation. The size of dynamic tx buffers is not fixed.
        For each tx packet from high layer stack, WiFi driver make a copy of it. For some applications,
        especially the UDP application, the high layer deliver speed is faster than the WiFi tx
        speed, we may run out of memory if no limitation for the dynamic tx buffer number. 

config ESP32_WIFI_AMPDU_ENABLED
    bool "WiFi AMPDU"
    depends on WIFI_ENABLED
    default y
    help
        Select this option to enable AMPDU feature


config ESP32_WIFI_NVS_ENABLED
    bool "WiFi NVS flash"
    depends on WIFI_ENABLED
    default y
    help
        Select this option to enable WiFi NVS flash

config PHY_ENABLED
	bool
	default y if WIFI_ENABLED || BT_ENABLED

menu PHY
	visible if PHY_ENABLED
	
config ESP32_PHY_CALIBRATION_AND_DATA_STORAGE
    bool "Do phy calibration and store calibration data in NVS"
    depends on PHY_ENABLED
    default y
    help
        If this option is enabled, NVS will be initialized and calibration data will be loaded from there.
        PHY calibration will be skipped on deep sleep wakeup. If calibration data is not found, full calibration
        will be performed and stored in NVS. In all other cases, only partial calibration will be performed. 

        If unsure, choose 'y'.

config ESP32_PHY_INIT_DATA_IN_PARTITION
    bool "Use a partition to store PHY init data"
    depends on PHY_ENABLED
    default n
    help
        If enabled, PHY init data will be loaded from a partition.
        When using a custom partition table, make sure that PHY data
        partition is included (type: 'data', subtype: 'phy').
        With default partition tables, this is done automatically.
        If PHY init data is stored in a partition, it has to be flashed there,
        otherwise runtime error will occur.

        If this option is not enabled, PHY init data will be embedded
        into the application binary.

        If unsure, choose 'n'.
	
config ESP32_PHY_MAX_WIFI_TX_POWER
    int "Max WiFi TX power (dBm)"
    range 0 20
    default 20
    depends on PHY_ENABLED && WIFI_ENABLED
    help
        Set maximum transmit power for WiFi radio. Actual transmit power for high
        data rates may be lower than this setting.

config ESP32_PHY_MAX_TX_POWER
	int
	depends on PHY_ENABLED
	default 20 if !WIFI_ENABLED
	default ESP32_PHY_MAX_WIFI_TX_POWER if WIFI_ENABLED

endmenu