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esp-idf/components/esp_system/Kconfig

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menu "ESP System Settings"
choice ESP_SYSTEM_PANIC
prompt "Panic handler behaviour"
default ESP_SYSTEM_PANIC_PRINT_REBOOT
help
If FreeRTOS detects unexpected behaviour or an unhandled exception, the panic handler is
invoked. Configure the panic handler's action here.
config ESP_SYSTEM_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 ESP_SYSTEM_PANIC_PRINT_REBOOT
bool "Print registers and reboot"
help
Outputs the relevant registers over the serial port and immediately
reset the processor.
config ESP_SYSTEM_PANIC_SILENT_REBOOT
bool "Silent reboot"
help
Just resets the processor without outputting anything
config ESP_SYSTEM_PANIC_GDBSTUB
bool "Invoke GDBStub"
select ESP_GDBSTUB_ENABLED
help
Invoke gdbstub on the serial port, allowing for gdb to attach to it to do a postmortem
of the crash.
endchoice
config ESP_SYSTEM_SINGLE_CORE_MODE
bool
default n
help
Only initialize and use the main core.
config ESP_SYSTEM_RTC_EXT_XTAL
# This is a High Layer Kconfig option, invisible, can be selected by other Kconfig option
# e.g. It will be selected on when ESP32_RTC_CLK_SRC_EXT_CRYS is on
bool
default n
config ESP_SYSTEM_RTC_EXT_XTAL_BOOTSTRAP_CYCLES
int "Bootstrap cycles for external 32kHz crystal"
depends on ESP_SYSTEM_RTC_EXT_XTAL
default 5 if IDF_TARGET_ESP32
default 0
range 0 32768
help
To reduce the startup time of an external RTC crystal,
we bootstrap it with a 32kHz square wave for a fixed number of cycles.
Setting 0 will disable bootstrapping (if disabled, the crystal may take
longer to start up or fail to oscillate under some conditions).
If this value is too high, a faulty crystal may initially start and then fail.
If this value is too low, an otherwise good crystal may not start.
To accurately determine if the crystal has started,
set a larger "Number of cycles for RTC_SLOW_CLK calibration" (about 3000).
config ESP_SYSTEM_RTC_FAST_MEM_AS_HEAP_DEPCHECK
bool
default y if IDF_TARGET_ESP32 && FREERTOS_UNICORE
default y if IDF_TARGET_ESP32S2
default y if IDF_TARGET_ESP32C3
default y if IDF_TARGET_ESP32S3
config ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP
bool "Enable RTC fast memory for dynamic allocations"
default y if IDF_TARGET_ESP32
default y if IDF_TARGET_ESP32S2
default y if IDF_TARGET_ESP32C3
default n if IDF_TARGET_ESP32S3 # TODO
depends on ESP_SYSTEM_RTC_FAST_MEM_AS_HEAP_DEPCHECK
help
This config option allows to add RTC fast memory region to system heap with capability
similar to that of DRAM region but without DMA. This memory will be consumed first per
heap initialization order by early startup services and scheduler related code. Speed
wise RTC fast memory operates on APB clock and hence does not have much performance impact.
menu "Memory protection"
config ESP_SYSTEM_MEMPROT_FEATURE
bool "Enable memory protection"
depends on IDF_TARGET_ESP32C3 || IDF_TARGET_ESP32S2
default "y"
help
If enabled, the permission control module watches all the memory access and fires the panic handler
if a permission violation is detected. This feature automatically splits
the SRAM memory into data and instruction segments and sets Read/Execute permissions
for the instruction part (below given splitting address) and Read/Write permissions
for the data part (above the splitting address). The memory protection is effective
on all access through the IRAM0 and DRAM0 buses.
config ESP_SYSTEM_MEMPROT_FEATURE_LOCK
depends on ESP_SYSTEM_MEMPROT_FEATURE
bool "Lock memory protection settings"
default "y"
help
Once locked, memory protection settings cannot be changed anymore.
The lock is reset only on the chip startup.
endmenu # Memory protection
config ESP_SYSTEM_EVENT_QUEUE_SIZE
int "System event queue size"
default 32
help
Config system event queue size in different application.
config ESP_SYSTEM_EVENT_TASK_STACK_SIZE
int "Event loop task stack size"
default 2304
help
Config system event task stack size in different application.
config ESP_MAIN_TASK_STACK_SIZE
int "Main task stack size"
default 3584
help
Configure the "main task" stack size. This is the stack of the task
which calls app_main(). If app_main() returns then this task is deleted
and its stack memory is freed.
choice ESP_MAIN_TASK_AFFINITY
prompt "Main task core affinity"
default ESP_MAIN_TASK_AFFINITY_CPU0
help
Configure the "main task" core affinity. This is the used core of the task
which calls app_main(). If app_main() returns then this task is deleted.
config ESP_MAIN_TASK_AFFINITY_CPU0
bool "CPU0"
config ESP_MAIN_TASK_AFFINITY_CPU1
bool "CPU1"
depends on !FREERTOS_UNICORE
config ESP_MAIN_TASK_AFFINITY_NO_AFFINITY
bool "No affinity"
endchoice
config ESP_MAIN_TASK_AFFINITY
hex
default 0x0 if ESP_MAIN_TASK_AFFINITY_CPU0
default 0x1 if ESP_MAIN_TASK_AFFINITY_CPU1
default FREERTOS_NO_AFFINITY if ESP_MAIN_TASK_AFFINITY_NO_AFFINITY
config ESP_MINIMAL_SHARED_STACK_SIZE
int "Minimal allowed size for shared stack"
default 2048
help
Minimal value of size, in bytes, accepted to execute a expression
with shared stack.
choice ESP_CONSOLE_UART
prompt "Channel for console output"
default ESP_CONSOLE_UART_DEFAULT
help
Select where to send console output (through stdout and stderr).
- Default is to use UART0 on pre-defined GPIOs.
- 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 ROM output can be suppressed by
GPIO strapping or EFUSE, refer to chip datasheet for details.
- On chips with USB peripheral, "USB CDC" option redirects output to the
CDC port. This option uses the CDC driver in the chip ROM.
This option is incompatible with TinyUSB stack.
config ESP_CONSOLE_UART_DEFAULT
bool "Default: UART0"
config ESP_CONSOLE_USB_CDC
bool "USB CDC"
# The naming is confusing: USB_ENABLED means that TinyUSB driver is enabled, not USB in general.
# && !USB_ENABLED is because the ROM CDC driver is currently incompatible with TinyUSB.
depends on (IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3) && !USB_ENABLED
config ESP_CONSOLE_UART_CUSTOM
bool "Custom UART"
config ESP_CONSOLE_NONE
bool "None"
endchoice
# Internal option, indicates that console UART is used (and not USB, for example)
config ESP_CONSOLE_UART
bool
default y if ESP_CONSOLE_UART_DEFAULT || ESP_CONSOLE_UART_CUSTOM
config ESP_CONSOLE_MULTIPLE_UART
bool
default y if !IDF_TARGET_ESP32C3
choice ESP_CONSOLE_UART_NUM
prompt "UART peripheral to use for console output (0-1)"
depends on ESP_CONSOLE_UART_CUSTOM && ESP_CONSOLE_MULTIPLE_UART
default ESP_CONSOLE_UART_CUSTOM_NUM_0
help
This UART peripheral is used for console output from the ESP-IDF Bootloader and the app.
If the configuration is different in the Bootloader binary compared to the app binary, UART
is reconfigured after the bootloader exits and the app starts.
Due to an ESP32 ROM bug, UART2 is not supported for console output
via esp_rom_printf.
config ESP_CONSOLE_UART_CUSTOM_NUM_0
bool "UART0"
config ESP_CONSOLE_UART_CUSTOM_NUM_1
bool "UART1"
endchoice
config ESP_CONSOLE_UART_NUM
int
default 0 if ESP_CONSOLE_UART_DEFAULT
default 0 if !ESP_CONSOLE_MULTIPLE_UART
default 0 if ESP_CONSOLE_UART_CUSTOM_NUM_0
default 1 if ESP_CONSOLE_UART_CUSTOM_NUM_1
default -1 if !ESP_CONSOLE_UART
config ESP_CONSOLE_UART_TX_GPIO
int "UART TX on GPIO#"
depends on ESP_CONSOLE_UART_CUSTOM
range 0 46
default 1 if IDF_TARGET_ESP32
default 21 if IDF_TARGET_ESP32C3
default 43
help
This GPIO is used for console UART TX output in the ESP-IDF Bootloader and the app (including
boot log output and default standard output and standard error of the app).
If the configuration is different in the Bootloader binary compared to the app binary, UART
is reconfigured after the bootloader exits and the app starts.
config ESP_CONSOLE_UART_RX_GPIO
int "UART RX on GPIO#"
depends on ESP_CONSOLE_UART_CUSTOM
range 0 46
default 3 if IDF_TARGET_ESP32
default 20 if IDF_TARGET_ESP32C3
default 44
help
This GPIO is used for UART RX input in the ESP-IDF Bootloader and the app (including
default default standard input of the app).
Note: The default ESP-IDF Bootloader configures this pin but doesn't read anything from the UART.
If the configuration is different in the Bootloader binary compared to the app binary, UART
is reconfigured after the bootloader exits and the app starts.
config ESP_CONSOLE_UART_BAUDRATE
int
prompt "UART console baud rate" if ESP_CONSOLE_UART_CUSTOM
depends on ESP_CONSOLE_UART
default 115200
range 1200 4000000 if !PM_ENABLE
range 1200 1000000 if PM_ENABLE
help
This baud rate is used by both the ESP-IDF Bootloader and the app (including
boot log output and default standard input/output/error of the app).
The app's maximum baud rate depends on the UART clock source. If Power Management is disabled,
the UART clock source is the APB clock and all baud rates in the available range will be sufficiently
accurate. If Power Management is enabled, REF_TICK clock source is used so the baud rate is divided
from 1MHz. Baud rates above 1Mbps are not possible and values between 500Kbps and 1Mbps may not be
accurate.
If the configuration is different in the Bootloader binary compared to the app binary, UART
is reconfigured after the bootloader exits and the app starts.
config ESP_CONSOLE_USB_CDC_RX_BUF_SIZE
int "Size of USB CDC RX buffer"
depends on ESP_CONSOLE_USB_CDC
default 64
range 4 16384
help
Set the size of USB CDC RX buffer. Increase the buffer size if your application
is often receiving data over USB CDC.
config ESP_CONSOLE_USB_CDC_SUPPORT_ETS_PRINTF
bool "Enable esp_rom_printf / ESP_EARLY_LOG via USB CDC"
depends on ESP_CONSOLE_USB_CDC
default n
help
If enabled, esp_rom_printf and ESP_EARLY_LOG output will also be sent over USB CDC.
Disabling this option saves about 1kB or RAM.
config ESP_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 ESP_INT_WDT_TIMEOUT_MS
int "Interrupt watchdog timeout (ms)"
depends on ESP_INT_WDT
default 300 if !ESP32_SPIRAM_SUPPORT
default 800 if ESP32_SPIRAM_SUPPORT
range 10 10000
help
The timeout of the watchdog, in miliseconds. Make this higher than the FreeRTOS tick rate.
config ESP_INT_WDT_CHECK_CPU1
bool "Also watch CPU1 tick interrupt"
depends on ESP_INT_WDT && !FREERTOS_UNICORE
default y
help
Also detect if interrupts on CPU 1 are disabled for too long.
config ESP_TASK_WDT
bool "Initialize Task Watchdog Timer on startup"
default y
help
The Task Watchdog Timer can be used to make sure individual tasks are still
running. Enabling this option will cause the Task Watchdog Timer to be
initialized automatically at startup. The Task Watchdog timer can be
initialized after startup as well (see Task Watchdog Timer API Reference)
config ESP_TASK_WDT_PANIC
bool "Invoke panic handler on Task Watchdog timeout"
depends on ESP_TASK_WDT
default n
help
If this option is enabled, the Task Watchdog Timer will be configured to
trigger the panic handler when it times out. This can also be configured
at run time (see Task Watchdog Timer API Reference)
config ESP_TASK_WDT_TIMEOUT_S
int "Task Watchdog timeout period (seconds)"
depends on ESP_TASK_WDT
range 1 60
default 5
help
Timeout period configuration for the Task Watchdog Timer in seconds.
This is also configurable at run time (see Task Watchdog Timer API Reference)
config ESP_TASK_WDT_CHECK_IDLE_TASK_CPU0
bool "Watch CPU0 Idle Task"
depends on ESP_TASK_WDT
default y
help
If this option is enabled, the Task Watchdog Timer will watch the CPU0
Idle Task. Having the Task Watchdog watch the Idle Task allows for detection
of CPU starvation as the Idle Task not being called is usually a symptom of
CPU starvation. Starvation of the Idle Task is detrimental as FreeRTOS household
tasks depend on the Idle Task getting some runtime every now and then.
config ESP_TASK_WDT_CHECK_IDLE_TASK_CPU1
bool "Watch CPU1 Idle Task"
depends on ESP_TASK_WDT && !FREERTOS_UNICORE
default y
help
If this option is enabled, the Task Wtachdog Timer will wach the CPU1
Idle Task.
config ESP_IPC_TASK_STACK_SIZE
int "Inter-Processor Call (IPC) task stack size"
range 512 65536 if !APPTRACE_ENABLE
range 2048 65536 if APPTRACE_ENABLE
default 2048 if APPTRACE_ENABLE
default 1024
help
Configure the IPC tasks stack size. One IPC task runs on each core
(in dual core mode), and allows for cross-core function calls.
See IPC documentation for more details.
The default stack size should be enough for most common use cases.
It can be shrunk if you are sure that you do not use any custom
IPC functionality.
config ESP_IPC_USES_CALLERS_PRIORITY
bool "IPC runs at caller's priority"
default y
depends on !FREERTOS_UNICORE
help
If this option is not enabled then the IPC task will keep behavior
same as prior to that of ESP-IDF v4.0, and hence IPC task will run
at (configMAX_PRIORITIES - 1) priority.
config ESP_PANIC_HANDLER_IRAM
bool "Place panic handler code in IRAM"
default n
help
If this option is disabled (default), the panic handler code is placed in flash not IRAM.
This means that if ESP-IDF crashes while flash cache is disabled, the panic handler will
automatically re-enable flash cache before running GDB Stub or Core Dump. This adds some minor
risk, if the flash cache status is also corrupted during the crash.
If this option is enabled, the panic handler code is placed in IRAM. This allows the panic
handler to run without needing to re-enable cache first. This may be necessary to debug some
complex issues with crashes while flash cache is disabled (for example, when writing to
SPI flash.)
config ESP_DEBUG_STUBS_ENABLE
bool
default COMPILER_OPTIMIZATION_LEVEL_DEBUG
depends on !ESP32_TRAX && !ESP32S2_TRAX
help
Debug stubs are used by OpenOCD to execute pre-compiled onboard code
which does some useful debugging stuff, e.g. GCOV data dump.
endmenu # ESP System Settings
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