esp-idf/components/driver/Kconfig

menu "Driver Configurations"

    menu "Legacy ADC Configuration"

        config ADC_DISABLE_DAC
            depends on SOC_DAC_SUPPORTED
            bool "Disable DAC when ADC2 is used on GPIO 25 and 26"
            default y
            help
                If this is set, the ADC2 driver will disable the output of the DAC corresponding to the specified
                channel. This is the default value.

                For testing, disable this option so that we can measure the output of DAC by internal ADC.

        config ADC_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy adc driver (driver/adc.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        menu "Legacy ADC Calibration Configuration"

            config ADC_CAL_EFUSE_TP_ENABLE
                depends on IDF_TARGET_ESP32
                bool "Use Two Point Values"
                default "y"
                help
                    Some ESP32s have Two Point calibration values burned into eFuse BLOCK3.
                    This option will allow the ADC calibration component to characterize the
                    ADC-Voltage curve using Two Point values if they are available.

            config ADC_CAL_EFUSE_VREF_ENABLE
                depends on IDF_TARGET_ESP32
                bool "Use eFuse Vref"
                default "y"
                help
                    Some ESP32s have Vref burned into eFuse BLOCK0. This option will allow
                    the ADC calibration component to characterize the ADC-Voltage curve using
                    eFuse Vref if it is available.

            config ADC_CAL_LUT_ENABLE
                depends on IDF_TARGET_ESP32
                bool "Use Lookup Tables"
                default "y"
                help
                    This option will allow the ADC calibration component to use Lookup Tables
                    to correct for non-linear behavior in 11db attenuation. Other attenuations
                    do not exhibit non-linear behavior hence will not be affected by this option.

            config ADC_CALI_SUPPRESS_DEPRECATE_WARN
                bool "Suppress legacy driver deprecated warning"
                default n
                help
                    Wether to suppress the deprecation warnings when using legacy adc calibration
                    driver (esp_adc_cal.h).
                    If you want to continue using the legacy driver, and don't want to see related
                    deprecation warnings, you can enable this option.

        endmenu

    endmenu  # ADC Configuration

    menu "SPI Configuration"

        config SPI_MASTER_IN_IRAM
            bool "Place transmitting functions of SPI master into IRAM"
            default n
            depends on !FREERTOS_PLACE_FUNCTIONS_INTO_FLASH
            select SPI_MASTER_ISR_IN_IRAM
            help
                Normally only the ISR of SPI master is placed in the IRAM, so that it
                can work without the flash when interrupt is triggered.
                For other functions, there's some possibility that the flash cache
                miss when running inside and out of SPI functions, which may increase
                the interval of SPI transactions.
                Enable this to put ``queue_trans``, ``get_trans_result`` and
                ``transmit`` functions into the IRAM to avoid possible cache miss.

                This configuration won't be available if `CONFIG_FREERTOS_PLACE_FUNCTIONS_INTO_FLASH` is enabled.

                During unit test, this is enabled to measure the ideal case of api.

        config SPI_MASTER_ISR_IN_IRAM
            bool "Place SPI master ISR function into IRAM"
            default y
            depends on !HEAP_PLACE_FUNCTION_INTO_FLASH
            select PERIPH_CTRL_FUNC_IN_IRAM
            help
                Place the SPI master ISR in to IRAM to avoid possible cache miss.

                Enabling this configuration is possible only when HEAP_PLACE_FUNCTION_INTO_FLASH
                is disabled since the spi master uses can allocate transactions buffers into DMA
                memory section using the heap component API that ipso facto has to be placed in IRAM.

                Also you can forbid the ISR being disabled during flash writing
                access, by add ESP_INTR_FLAG_IRAM when initializing the driver.

        config SPI_SLAVE_IN_IRAM
            bool "Place transmitting functions of SPI slave into IRAM"
            default n
            select SPI_SLAVE_ISR_IN_IRAM
            help
                Normally only the ISR of SPI slave is placed in the IRAM, so that it
                can work without the flash when interrupt is triggered.
                For other functions, there's some possibility that the flash cache
                miss when running inside and out of SPI functions, which may increase
                the interval of SPI transactions.
                Enable this to put ``queue_trans``, ``get_trans_result`` and
                ``transmit`` functions into the IRAM to avoid possible cache miss.

        config SPI_SLAVE_ISR_IN_IRAM
            bool "Place SPI slave ISR function into IRAM"
            default y
            select PERIPH_CTRL_FUNC_IN_IRAM
            help
                Place the SPI slave ISR in to IRAM to avoid possible cache miss.

                Also you can forbid the ISR being disabled during flash writing
                access, by add ESP_INTR_FLAG_IRAM when initializing the driver.

    endmenu # SPI Configuration

    menu "TWAI Configuration"
        depends on SOC_TWAI_SUPPORTED

        config TWAI_ISR_IN_IRAM
            bool "Place TWAI ISR function into IRAM"
            default n
            select PERIPH_CTRL_FUNC_IN_IRAM if TWAI_ERRATA_FIX_RX_FRAME_INVALID || TWAI_ERRATA_FIX_RX_FIFO_CORRUPT
            help
                Place the TWAI ISR in to IRAM. This will allow the ISR to avoid
                cache misses, and also be able to run whilst the cache is disabled
                (such as when writing to SPI Flash).
                Note that if this option is enabled:
                - Users should also set the ESP_INTR_FLAG_IRAM in the driver
                configuration structure when installing the driver (see docs for
                specifics).
                - Alert logging (i.e., setting of the TWAI_ALERT_AND_LOG flag)
                will have no effect.

        config TWAI_ERRATA_FIX_BUS_OFF_REC
            bool "Add SW workaround for REC change during bus-off"
            depends on IDF_TARGET_ESP32
            default y
            help
                When the bus-off condition is reached, the REC should be reset to 0 and frozen (via LOM) by the
                driver's ISR. However on the ESP32, there is an edge case where the REC will increase before the
                driver's ISR can respond in time (e.g., due to the rapid occurrence of bus errors), thus causing the
                REC to be non-zero after bus-off. A non-zero REC can prevent bus-off recovery as the bus-off recovery
                condition is that both TEC and REC become 0. Enabling this option will add a workaround in the driver
                to forcibly reset REC to zero on reaching bus-off.

        config TWAI_ERRATA_FIX_TX_INTR_LOST
            bool "Add SW workaround for TX interrupt lost errata"
            depends on IDF_TARGET_ESP32
            default y
            help
                On the ESP32, when a transmit interrupt occurs, and interrupt register is read on the same APB clock
                cycle, the transmit interrupt could be lost. Enabling this option will add a workaround that checks the
                transmit buffer status bit to recover any lost transmit interrupt.

        config TWAI_ERRATA_FIX_RX_FRAME_INVALID
            bool "Add SW workaround for invalid RX frame errata"
            depends on IDF_TARGET_ESP32
            default y
            help
                On the ESP32, when receiving a data or remote frame, if a bus error occurs in the data or CRC field,
                the data of the next received frame could be invalid. Enabling this option will add a workaround that
                will reset the peripheral on detection of this errata condition. Note that if a frame is transmitted on
                the bus whilst the reset is ongoing, the message will not be receive by the peripheral sent on the bus
                during the reset, the message will be lost.

        config TWAI_ERRATA_FIX_RX_FIFO_CORRUPT
            bool "Add SW workaround for RX FIFO corruption errata"
            depends on IDF_TARGET_ESP32
            default y
            help
                On the ESP32, when the RX FIFO overruns and the RX message counter maxes out at 64 messages, the entire
                RX FIFO is no longer recoverable. Enabling this option will add a workaround that resets the peripheral
                on detection of this errata condition. Note that if a frame is being sent on the bus during the reset
                bus during the reset, the message will be lost.

        config TWAI_ERRATA_FIX_LISTEN_ONLY_DOM
            bool "Add SW workaround for listen only transmits dominant bit errata"
            depends on IDF_TARGET_ESP32 || IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3 || IDF_TARGET_ESP32C3
            default y
            help
                When in the listen only mode, the TWAI controller must not influence the TWAI bus (i.e., must not send
                any dominant bits). However, while in listen only mode on the ESP32/ESP32-S2/ESP32-S3/ESP32-C3, the
                TWAI controller will still transmit dominant bits when it detects an error (i.e., as part of an active
                error frame). Enabling this option will add a workaround that forces the TWAI controller into an error
                passive state on initialization, thus preventing any dominant bits from being sent.

    endmenu # TWAI Configuration

    menu "Temperature sensor Configuration"
        depends on SOC_TEMP_SENSOR_SUPPORTED

        config TEMP_SENSOR_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy temperature sensor driver
                (driver/temp_sensor.h). If you want to continue using the legacy driver,
                and don't want to see related deprecation warnings, you can enable this option.

        config TEMP_SENSOR_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for temperature sensor driver.
                Note that, this option only controls the temperature sensor driver log, won't affect other drivers.

        config TEMP_SENSOR_ISR_IRAM_SAFE
            depends on SOC_TEMPERATURE_SENSOR_INTR_SUPPORT
            bool "Temperature sensor ISR IRAM-Safe"
            default n
            help
                Ensure the Temperature Sensor interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

    endmenu # TEMP_SENSOR Configuration

    menu "UART Configuration"

        config UART_ISR_IN_IRAM
            bool "Place UART ISR function into IRAM"
            depends on !RINGBUF_PLACE_ISR_FUNCTIONS_INTO_FLASH
            default n
            help
                If this option is not selected, UART interrupt will be disabled for a long time and
                may cause data lost when doing spi flash operation.

    endmenu # UART Configuration

    menu "GPIO Configuration"
        config GPIO_ESP32_SUPPORT_SWITCH_SLP_PULL
            bool "Support light sleep GPIO pullup/pulldown configuration for ESP32"
            depends on IDF_TARGET_ESP32
            help
                This option is intended to fix the bug that ESP32 is not able to switch to configured
                pullup/pulldown mode in sleep.
                If this option is selected, chip will automatically emulate the behaviour of switching,
                and about 450B of source codes would be placed into IRAM.

        config GPIO_CTRL_FUNC_IN_IRAM
            bool "Place GPIO control functions into IRAM"
            default n
            help
                Place GPIO control functions (like intr_disable/set_level) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
    endmenu # GPIO Configuration

    menu "Sigma Delta Modulator Configuration"
        depends on SOC_SDM_SUPPORTED
        config SDM_CTRL_FUNC_IN_IRAM
            bool "Place SDM control functions into IRAM"
            default n
            help
                Place SDM control functions (like set_duty) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config SDM_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy sigma delta driver.
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config SDM_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for SDM driver.
                Note that, this option only controls the SDM driver log, won't affect other drivers.
    endmenu # Sigma Delta Modulator Configuration

    menu "Analog Comparator Configuration"
        depends on SOC_ANA_CMPR_SUPPORTED
        config ANA_CMPR_ISR_IRAM_SAFE
            bool "Analog comparator ISR IRAM-Safe"
            default n
            help
                Ensure the Analog Comparator interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config ANA_CMPR_CTRL_FUNC_IN_IRAM
            bool "Place Analog Comparator control functions into IRAM"
            default n
            help
                Place Analog Comparator control functions (like ana_cmpr_set_internal_reference) into IRAM,
                so that these functions can be IRAM-safe and able to be called in an IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config ANA_CMPR_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for Analog Comparator driver.
                Note that, this option only controls the Analog Comparator driver log, won't affect other drivers.
    endmenu # Analog Comparator Configuration

    menu "GPTimer Configuration"
        config GPTIMER_CTRL_FUNC_IN_IRAM
            bool "Place GPTimer control functions into IRAM"
            default n
            help
                Place GPTimer control functions (like start/stop) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config GPTIMER_ISR_IRAM_SAFE
            bool "GPTimer ISR IRAM-Safe"
            default n
            help
                Ensure the GPTimer interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config GPTIMER_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy timer group driver (driver/timer.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config GPTIMER_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for GPTimer driver.
                Note that, this option only controls the GPTimer driver log, won't affect other drivers.
    endmenu # GPTimer Configuration

    menu "PCNT Configuration"
        depends on SOC_PCNT_SUPPORTED
        config PCNT_CTRL_FUNC_IN_IRAM
            bool "Place PCNT control functions into IRAM"
            default n
            help
                Place PCNT control functions (like start/stop) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config PCNT_ISR_IRAM_SAFE
            bool "PCNT ISR IRAM-Safe"
            default n
            help
                Ensure the PCNT interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config PCNT_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy PCNT driver (driver/pcnt.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config PCNT_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for PCNT driver.
                Note that, this option only controls the PCNT driver log, won't affect other drivers.
    endmenu # PCNT Configuration

    menu "RMT Configuration"
        depends on SOC_RMT_SUPPORTED
        config RMT_ISR_IRAM_SAFE
            bool "RMT ISR IRAM-Safe"
            default n
            select GDMA_ISR_IRAM_SAFE if SOC_RMT_SUPPORT_DMA     # RMT basic functionality relies on GDMA callback
            select GDMA_CTRL_FUNC_IN_IRAM if SOC_RMT_SUPPORT_DMA # RMT needs to restart the GDMA in the interrupt
            help
                Ensure the RMT interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config RMT_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy rmt driver (driver/rmt.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config RMT_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for RMT driver.
                Note that, this option only controls the RMT driver log, won't affect other drivers.
    endmenu # RMT Configuration

    menu "MCPWM Configuration"
        depends on SOC_MCPWM_SUPPORTED
        config MCPWM_ISR_IRAM_SAFE
            bool "Place MCPWM ISR function into IRAM"
            default n
            help
                This will ensure the MCPWM interrupt handle is IRAM-Safe, allow to avoid flash
                cache misses, and also be able to run whilst the cache is disabled.
                (e.g. SPI Flash write)

        config MCPWM_CTRL_FUNC_IN_IRAM
            bool "Place MCPWM control functions into IRAM"
            default n
            help
                Place MCPWM control functions (like set_compare_value) into IRAM,
                so that these functions can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config MCPWM_SUPPRESS_DEPRECATE_WARN
            bool "Suppress leagcy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy MCPWM driver (driver/mcpwm.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config MCPWM_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for MCPWM driver.
                Note that, this option only controls the MCPWM driver log, won't affect other drivers.
    endmenu # MCPWM Configuration

    menu "I2S Configuration"
        depends on SOC_I2S_SUPPORTED
        config I2S_ISR_IRAM_SAFE
            bool "I2S ISR IRAM-Safe"
            default n
            help
                Ensure the I2S interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config I2S_SUPPRESS_DEPRECATE_WARN
            bool "Suppress leagcy driver deprecated warning"
            default n
            help
                Enable this option will suppress the deprecation warnings of using APIs in legacy I2S driver.

        config I2S_ENABLE_DEBUG_LOG
            bool "Enable I2S debug log"
            default n
            help
                Wether to enable the debug log message for I2S driver.
                Note that, this option only controls the I2S driver log, will not affect other drivers.
    endmenu # I2S Configuration

    menu "DAC Configuration"
        depends on SOC_DAC_SUPPORTED
        config DAC_CTRL_FUNC_IN_IRAM
            bool "Place DAC control functions into IRAM"
            default n
            help
                Place DAC control functions (e.g. 'dac_oneshot_output_voltage') into IRAM,
                so that this function can be IRAM-safe and able to be called in the other IRAM interrupt context.
                Enabling this option can improve driver performance as well.

        config DAC_ISR_IRAM_SAFE
            bool "DAC ISR IRAM-Safe"
            default n
            help
                Ensure the DAC interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

        config DAC_SUPPRESS_DEPRECATE_WARN
            bool "Suppress legacy driver deprecated warning"
            default n
            help
                Wether to suppress the deprecation warnings when using legacy DAC driver (driver/dac.h).
                If you want to continue using the legacy driver, and don't want to see related deprecation warnings,
                you can enable this option.

        config DAC_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for DAC driver.
                Note that, this option only controls the DAC driver log, won't affect other drivers.

        config DAC_DMA_AUTO_16BIT_ALIGN
            bool "Align the continuous data to 16 bit automatically"
            depends on SOC_DAC_DMA_16BIT_ALIGN
            default y
            help
                Whether to left shift the continuous data to align every bytes to 16 bits in the driver.
                On ESP32, although the DAC resolution is only 8 bits,
                the hardware requires 16 bits data in continuous mode.
                By enabling this option, the driver will left shift 8 bits for the input data automatically.
                Only disable this option when you decide to do this step by yourself.
                Note that the driver will allocate a new piece of memory to save the converted data.

    endmenu # DAC Configuration

    menu "USB Serial/JTAG Configuration"
        depends on SOC_USB_SERIAL_JTAG_SUPPORTED
        config USJ_NO_AUTO_LS_ON_CONNECTION
            bool "Don't enter the automatic light sleep when USB Serial/JTAG port is connected"
            depends on PM_ENABLE && ESP_CONSOLE_USB_SERIAL_JTAG_ENABLED && !SOC_USB_SERIAL_JTAG_SUPPORT_LIGHT_SLEEP
            default n
            help
                If enabled, the chip will constantly monitor the connection status of the USB Serial/JTAG port. As long
                as the USB Serial/JTAG is connected, a ESP_PM_NO_LIGHT_SLEEP power management lock will be acquired to
                prevent the system from entering light sleep.
                This option can be useful if serial monitoring is needed via USB Serial/JTAG while power management is
                enabled, as the USB Serial/JTAG cannot work under light sleep and after waking up from light sleep.
                Note. This option can only control the automatic Light-Sleep behavior. If esp_light_sleep_start() is
                called manually from the program, enabling this option will not prevent light sleep entry even if the
                USB Serial/JTAG is in use.
    endmenu # USB Serial/JTAG Configuration

    menu "Parallel IO Configuration"
        depends on SOC_PARLIO_SUPPORTED

        config PARLIO_ENABLE_DEBUG_LOG
            bool "Enable debug log"
            default n
            help
                Wether to enable the debug log message for parallel IO driver.
                Note that, this option only controls the parallel IO driver log, won't affect other drivers.

        config PARLIO_ISR_IRAM_SAFE
            bool "Parallel IO ISR IRAM-Safe"
            default n
            select GDMA_CTRL_FUNC_IN_IRAM # the driver needs to start the GDMA in the interrupt
            help
                Ensure the Parallel IO interrupt is IRAM-Safe by allowing the interrupt handler to be
                executable when the cache is disabled (e.g. SPI Flash write).

    endmenu # Parallel IO Configuration

endmenu  # Driver configurations