esp-idf/components/esp32c2/Kconfig

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menu "ESP32C2-Specific"
visible if IDF_TARGET_ESP32C2
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choice ESP32C2_DEFAULT_CPU_FREQ_MHZ
prompt "CPU frequency"
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default ESP32C2_DEFAULT_CPU_FREQ_40 if IDF_ENV_FPGA
default ESP32C2_DEFAULT_CPU_FREQ_120 if !IDF_ENV_FPGA
help
CPU frequency to be set on application startup.
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config ESP32C2_DEFAULT_CPU_FREQ_40
bool "40 MHz"
depends on IDF_ENV_FPGA
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config ESP32C2_DEFAULT_CPU_FREQ_80
bool "80 MHz"
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config ESP32C2_DEFAULT_CPU_FREQ_120
bool "120 MHz"
endchoice
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config ESP32C2_DEFAULT_CPU_FREQ_MHZ
int
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default 40 if ESP32C2_DEFAULT_CPU_FREQ_40
default 80 if ESP32C2_DEFAULT_CPU_FREQ_80
default 120 if ESP32C2_DEFAULT_CPU_FREQ_120
menu "Cache config"
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choice ESP32C2_MMU_PAGE_SIZE
# TODO: IDF-3821
prompt "Cache page size"
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default ESP32C2_MMU_PAGE_SIZE_64KB
help
Cache page size to be set on application startup
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config ESP32C2_MMU_PAGE_SIZE_16KB
bool "16KB"
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config ESP32C2_MMU_PAGE_SIZE_32KB
bool "32KB"
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config ESP32C2_MMU_PAGE_SIZE_64KB
bool "64KB"
endchoice
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config ESP32C2_INSTRUCTION_CACHE_WRAP
bool
prompt "Instruction cache wrap"
help
If enabled, instruction cache will use wrap mode to read spi flash.
The wrap length is fixed to 32B
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config ESP32C2_MMU_PAGE_MODE
int
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default 0 if ESP32C2_MMU_PAGE_SIZE_16KB
default 1 if ESP32C2_MMU_PAGE_SIZE_32KB
default 2 if ESP32C2_MMU_PAGE_SIZE_64KB
endmenu
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config ESP32C2_DEBUG_STUBS_ENABLE
bool "OpenOCD debug stubs"
default COMPILER_OPTIMIZATION_LEVEL_DEBUG
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depends on !ESP32C2_TRAX
help
Debug stubs are used by OpenOCD to execute pre-compiled onboard code which does some useful debugging,
e.g. GCOV data dump.
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choice ESP32C2_TIME_SYSCALL
prompt "Timers used for gettimeofday function"
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default ESP32C2_TIME_SYSCALL_USE_RTC_SYSTIMER
help
This setting defines which hardware timers are used to
implement 'gettimeofday' and 'time' functions in C library.
- If both high-resolution (systimer) and RTC timers are used, timekeeping will
continue in deep sleep. Time will be reported at 1 microsecond
resolution. This is the default, and the recommended option.
- If only high-resolution timer (systimer) is used, gettimeofday will
provide time at microsecond resolution.
Time will not be preserved when going into deep sleep mode.
- 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.
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config ESP32C2_TIME_SYSCALL_USE_RTC_SYSTIMER
bool "RTC and high-resolution timer"
select ESP_TIME_FUNCS_USE_RTC_TIMER
select ESP_TIME_FUNCS_USE_ESP_TIMER
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config ESP32C2_TIME_SYSCALL_USE_RTC
bool "RTC"
select ESP_TIME_FUNCS_USE_RTC_TIMER
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config ESP32C2_TIME_SYSCALL_USE_SYSTIMER
bool "High-resolution timer"
select ESP_TIME_FUNCS_USE_ESP_TIMER
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config ESP32C2_TIME_SYSCALL_USE_NONE
bool "None"
select ESP_TIME_FUNCS_USE_NONE
endchoice
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choice ESP32C2_RTC_CLK_SRC
prompt "RTC clock source"
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default ESP32C2_RTC_CLK_SRC_INT_RC
help
Choose which clock is used as RTC clock source.
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config ESP32C2_RTC_CLK_SRC_INT_RC
bool "Internal 150kHz RC oscillator"
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config ESP32C2_RTC_CLK_SRC_EXT_OSC
bool "External 32kHz oscillator at 32K_XP pin"
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config ESP32C2_RTC_CLK_SRC_INT_8MD256
bool "Internal 8MHz oscillator, divided by 256 (~32kHz)"
endchoice
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config ESP32C2_RTC_CLK_CAL_CYCLES
int "Number of cycles for RTC_SLOW_CLK calibration"
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default 3000 if ESP32C2_RTC_CLK_SRC_EXT_CRYS || ESP32C2_RTC_CLK_SRC_EXT_OSC || ESP32C2_RTC_CLK_SRC_INT_8MD256
default 1024 if ESP32C2_RTC_CLK_SRC_INT_RC
range 0 27000 if ESP32C2_RTC_CLK_SRC_EXT_CRYS || ESP32C2_RTC_CLK_SRC_EXT_OSC || ESP32C2_RTC_CLK_SRC_INT_8MD256
range 0 32766 if ESP32C2_RTC_CLK_SRC_INT_RC
help
When the startup code initializes RTC_SLOW_CLK, it can perform
calibration by comparing the RTC_SLOW_CLK frequency with main XTAL
frequency. This option sets the number of RTC_SLOW_CLK cycles measured
by the calibration routine. Higher numbers increase calibration
precision, which may be important for applications which spend a lot of
time in deep sleep. Lower numbers reduce startup time.
When this option is set to 0, clock calibration will not be performed at
startup, and approximate clock frequencies will be assumed:
- 150000 Hz if internal RC oscillator is used as clock source. For this use value 1024.
- 32768 Hz if the 32k crystal oscillator is used. For this use value 3000 or more.
In case more value will help improve the definition of the launch of the crystal.
If the crystal could not start, it will be switched to internal RC.
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config ESP32C2_LIGHTSLEEP_GPIO_RESET_WORKAROUND # IDF-3904
bool "light sleep GPIO reset workaround"
default y
select PM_SLP_DISABLE_GPIO if FREERTOS_USE_TICKLESS_IDLE
help
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ESP32C2 will reset at wake-up if GPIO is received a small electrostatic pulse during
light sleep, with specific condition
- GPIO needs to be configured as input-mode only
- The pin receives a small electrostatic pulse, and reset occurs when the pulse
voltage is higher than 6 V
For GPIO set to input mode only, it is not a good practice to leave it open/floating,
The hardware design needs to controlled it with determined supply or ground voltage
is necessary.
This option provides a software workaround for this issue. Configure to isolate all
GPIO pins in sleep state.
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endmenu # ESP32C2-Specific