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esp-idf/components/esp_system/Kconfig

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menu "ESP System Settings"
# Insert chip-specific cpu config
rsource "./port/soc/$IDF_TARGET/Kconfig.cpu"
orsource "./port/soc/$IDF_TARGET/Kconfig.cache"
orsource "./port/soc/$IDF_TARGET/Kconfig.memory"
orsource "./port/soc/$IDF_TARGET/Kconfig.tracemem"
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 "GDBStub on panic"
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.
config ESP_SYSTEM_GDBSTUB_RUNTIME
bool "GDBStub at runtime"
select ESP_GDBSTUB_ENABLED
depends on !IDF_TARGET_ESP32C2
help
Invoke gdbstub on the serial port, allowing for gdb to attach to it and to do a debug on runtime.
endchoice
config ESP_SYSTEM_PANIC_REBOOT_DELAY_SECONDS
int "Panic reboot delay (Seconds)"
default 0
range 0 99
depends on ESP_SYSTEM_PANIC_PRINT_REBOOT
help
After the panic handler executes, you can specify a number of seconds to
wait before the device reboots.
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 RTC_CLK_SRC_EXT_CRYS is on
bool
default n
config ESP_SYSTEM_RTC_EXT_OSC
# This is a High Layer Kconfig option, invisible, can be selected by other Kconfig option
# e.g. It will be selected on when ESPX_RTC_CLK_SRC_EXT_OSC 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
default y if IDF_TARGET_ESP32H4
default y if IDF_TARGET_ESP32C6
default n if IDF_TARGET_ESP32H2 # IDF-5667 & IDF-6847
depends on SOC_RTC_FAST_MEM_SUPPORTED
config ESP_SYSTEM_ALLOW_RTC_FAST_MEM_AS_HEAP
bool "Enable RTC fast memory for dynamic allocations"
default y
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.
config ESP_SYSTEM_USE_EH_FRAME
bool "Generate and use eh_frame for backtracing"
default n
depends on IDF_TARGET_ARCH_RISCV
help
Generate DWARF information for each function of the project. These information will parsed and used to
perform backtracing when panics occur. Activating this option will activate asynchronous frame unwinding
and generation of both .eh_frame and .eh_frame_hdr sections, resulting in a bigger binary size (20% to
100% larger). The main purpose of this option is to be able to have a backtrace parsed and printed by
the program itself, regardless of the serial monitor used.
This option shall NOT be used for production.
menu "Memory protection"
config ESP_SYSTEM_PMP_IDRAM_SPLIT
bool "Enable IRAM/DRAM split protection"
depends on SOC_CPU_IDRAM_SPLIT_USING_PMP
default "y"
help
If enabled, the CPU watches all the memory access and raises an exception in case
of any memory violation. This feature automatically splits
the SRAM memory, using PMP, 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
bool "Enable memory protection"
depends on SOC_MEMPROT_SUPPORTED
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 OTG 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.
- On chips with an USB serial/JTAG debug controller, selecting the option
for that redirects output to the CDC/ACM (serial port emulation) component
of that device.
config ESP_CONSOLE_UART_DEFAULT
bool "Default: UART0"
config ESP_CONSOLE_USB_CDC
bool "USB CDC"
# && !TINY_USB is because the ROM CDC driver is currently incompatible with TinyUSB.
depends on (IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3) && !TINY_USB
config ESP_CONSOLE_USB_SERIAL_JTAG
bool "USB Serial/JTAG Controller"
select ESPTOOLPY_NO_STUB if IDF_TARGET_ESP32C3 #ESPTOOL-252
depends on SOC_USB_SERIAL_JTAG_SUPPORTED
config ESP_CONSOLE_UART_CUSTOM
bool "Custom UART"
config ESP_CONSOLE_NONE
bool "None"
endchoice
choice ESP_CONSOLE_SECONDARY
depends on SOC_USB_SERIAL_JTAG_SUPPORTED
prompt "Channel for console secondary output"
default ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
help
This secondary option supports output through other specific port like USB_SERIAL_JTAG
when UART0 port as a primary is selected but not connected. This secondary output currently only supports
non-blocking mode without using REPL. If you want to output in blocking mode with REPL or
input through this secondary port, please change the primary config to this port
in `Channel for console output` menu.
config ESP_CONSOLE_SECONDARY_NONE
bool "No secondary console"
config ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
bool "USB_SERIAL_JTAG PORT"
depends on !ESP_CONSOLE_USB_SERIAL_JTAG
help
This option supports output through USB_SERIAL_JTAG port when the UART0 port is not connected.
The output currently only supports non-blocking mode without using the console.
If you want to output in blocking mode with REPL or input through USB_SERIAL_JTAG port,
please change the primary config to ESP_CONSOLE_USB_SERIAL_JTAG above.
endchoice
config ESP_CONSOLE_USB_SERIAL_JTAG_ENABLED
# Internal option, indicates that console USB SERIAL JTAG is used
bool
default y if ESP_CONSOLE_USB_SERIAL_JTAG || ESP_CONSOLE_SECONDARY_USB_SERIAL_JTAG
config ESP_CONSOLE_UART
# Internal option, indicates that console UART is used (and not USB, for example)
bool
default y if ESP_CONSOLE_UART_DEFAULT || ESP_CONSOLE_UART_CUSTOM
config ESP_CONSOLE_MULTIPLE_UART
bool
default y if !IDF_TARGET_ESP32C3 && !IDF_TARGET_ESP32H4 && !IDF_TARGET_ESP32C2
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 20 if IDF_TARGET_ESP32C2
default 21 if IDF_TARGET_ESP32C3
default 16 if IDF_TARGET_ESP32C6
default 24 if IDF_TARGET_ESP32H2
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 19 if IDF_TARGET_ESP32C2
default 20 if IDF_TARGET_ESP32C3
default 17 if IDF_TARGET_ESP32C6
default 23 if IDF_TARGET_ESP32H2
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 74880 if (IDF_TARGET_ESP32C2 && XTAL_FREQ_26)
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 !(SPIRAM && IDF_TARGET_ESP32)
default 800 if (SPIRAM && IDF_TARGET_ESP32)
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_EN
bool "Enable Task Watchdog Timer"
default y
select FREERTOS_ENABLE_TASK_SNAPSHOT
help
The Task Watchdog Timer can be used to make sure individual tasks are still
running. Enabling this option will enable the Task Watchdog Timer. It can be
either initialized automatically at startup or initialized after startup
(see Task Watchdog Timer API Reference)
config ESP_TASK_WDT_USE_ESP_TIMER
# Software implementation of Task Watchdog, handy for targets with only a single
# Timer Group, such as the ESP32-C2
bool
depends on ESP_TASK_WDT_EN
default y if IDF_TARGET_ESP32C2
default n if !IDF_TARGET_ESP32C2
select ESP_TIMER_SUPPORTS_ISR_DISPATCH_METHOD
config ESP_TASK_WDT_INIT
bool "Initialize Task Watchdog Timer on startup"
depends on ESP_TASK_WDT_EN
default y
help
Enabling this option will cause the Task Watchdog Timer to be initialized
automatically at startup.
config ESP_TASK_WDT_PANIC
bool "Invoke panic handler on Task Watchdog timeout"
depends on ESP_TASK_WDT_INIT
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_INIT
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_INIT
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_INIT && !FREERTOS_UNICORE
default y
help
If this option is enabled, the Task Watchdog Timer will wach the CPU1
Idle Task.
config ESP_XT_WDT
bool "Initialize XTAL32K watchdog timer on startup"
depends on !IDF_TARGET_ESP32 && (ESP_SYSTEM_RTC_EXT_OSC || ESP_SYSTEM_RTC_EXT_XTAL)
default n
help
This watchdog timer can detect oscillation failure of the XTAL32K_CLK. When such a failure
is detected the hardware can be set up to automatically switch to BACKUP32K_CLK and generate
an interrupt.
config ESP_XT_WDT_TIMEOUT
int "XTAL32K watchdog timeout period"
depends on ESP_XT_WDT
range 1 255
default 200
help
Timeout period configuration for the XTAL32K watchdog timer based on RTC_CLK.
config ESP_XT_WDT_BACKUP_CLK_ENABLE
bool "Automatically switch to BACKUP32K_CLK when timer expires"
depends on ESP_XT_WDT
default y
help
Enable this to automatically switch to BACKUP32K_CLK as the source of RTC_SLOW_CLK when
the watchdog timer expires.
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 (including required UART functions) is placed
in IRAM. This may be necessary to debug some complex issues with crashes while flash cache is
disabled (for example, when writing to SPI flash) or when flash cache is corrupted when an exception
is triggered.
config ESP_DEBUG_STUBS_ENABLE
bool "OpenOCD debug stubs"
default COMPILER_OPTIMIZATION_LEVEL_DEBUG
depends on !ESP32_TRAX && !ESP32S2_TRAX && !ESP32S3_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.
config ESP_DEBUG_OCDAWARE
bool "Make exception and panic handlers JTAG/OCD aware"
default y
select FREERTOS_DEBUG_OCDAWARE
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.
choice ESP_SYSTEM_CHECK_INT_LEVEL
prompt "Interrupt level to use for Interrupt Watchdog and other system checks"
default ESP_SYSTEM_CHECK_INT_LEVEL_4
help
Interrupt level to use for Interrupt Watchdog and other system checks.
config ESP_SYSTEM_CHECK_INT_LEVEL_5
bool "Level 5 interrupt"
depends on IDF_TARGET_ESP32
help
Using level 5 interrupt for Interrupt Watchdog and other system checks.
config ESP_SYSTEM_CHECK_INT_LEVEL_4
bool "Level 4 interrupt"
depends on !BTDM_CTRL_HLI
help
Using level 4 interrupt for Interrupt Watchdog and other system checks.
endchoice
# Insert chip-specific system config
rsource "./port/soc/$IDF_TARGET/Kconfig.system"
config ESP_SYSTEM_BROWNOUT_INTR
bool
default n
help
This config allows to trigger an interrupt when brownout detected. Software restart will be done
at the end of the default callback.
Two occasions need to restart the chip with interrupt so far.
(1). For ESP32 version 1, brown-out reset function doesn't work (see ESP32 errata 3.4).
So that we must restart from interrupt.
(2). For special workflow, the chip needs do more things instead of restarting directly. This part
needs to be done in callback function of interrupt.
endmenu # ESP System Settings
menu "IPC (Inter-Processor Call)"
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 1280 if !APPTRACE_ENABLE && IDF_TARGET_ESP32S3
default 1024
help
Configure the IPC tasks stack size. An 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 IPC stack size should be
enough for most common simple use cases. However, users can increase/decrease the stack size to their
needs.
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,
hence IPC task will run at (configMAX_PRIORITIES - 1) priority.
config ESP_IPC_ISR_ENABLE
bool
default y if !FREERTOS_UNICORE
help
The IPC ISR feature is similar to the IPC feature except that the callback function is executed in the
context of a High Priority Interrupt. The IPC ISR feature is itended for low latency execution of simple
callbacks written in assembly on another CPU. Due to being run in a High Priority Interrupt, the assembly
callbacks must be written with particular restrictions (see "IPC" and "High-Level Interrupt" docs for more
details).
endmenu # "IPC (Inter-Processor Call)
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