/* * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include <stdio.h> #include <stdbool.h> #include "sdkconfig.h" #include "esp_err.h" #include "esp_intr_alloc.h" #include "soc/soc_caps.h" #include "hal/gpio_types.h" #include "esp_rom_gpio.h" #include "driver/gpio_etm.h" #ifdef __cplusplus extern "C" { #endif #define GPIO_PIN_COUNT (SOC_GPIO_PIN_COUNT) /// Check whether it is a valid GPIO number #define GPIO_IS_VALID_GPIO(gpio_num) ((gpio_num >= 0) && \ (((1ULL << (gpio_num)) & SOC_GPIO_VALID_GPIO_MASK) != 0)) /// Check whether it can be a valid GPIO number of output mode #define GPIO_IS_VALID_OUTPUT_GPIO(gpio_num) ((gpio_num >= 0) && \ (((1ULL << (gpio_num)) & SOC_GPIO_VALID_OUTPUT_GPIO_MASK) != 0)) /// Check whether it can be a valid digital I/O pad #define GPIO_IS_VALID_DIGITAL_IO_PAD(gpio_num) ((gpio_num >= 0) && \ (((1ULL << (gpio_num)) & SOC_GPIO_VALID_DIGITAL_IO_PAD_MASK) != 0)) typedef intr_handle_t gpio_isr_handle_t; /** * @brief GPIO interrupt handler * * @param arg User registered data */ typedef void (*gpio_isr_t)(void *arg); /** * @brief Configuration parameters of GPIO pad for gpio_config function */ typedef struct { uint64_t pin_bit_mask; /*!< GPIO pin: set with bit mask, each bit maps to a GPIO */ gpio_mode_t mode; /*!< GPIO mode: set input/output mode */ gpio_pullup_t pull_up_en; /*!< GPIO pull-up */ gpio_pulldown_t pull_down_en; /*!< GPIO pull-down */ gpio_int_type_t intr_type; /*!< GPIO interrupt type */ #if SOC_GPIO_SUPPORT_PIN_HYS_FILTER gpio_hys_ctrl_mode_t hys_ctrl_mode; /*!< GPIO hysteresis: hysteresis filter on slope input */ #endif } gpio_config_t; /** * @brief GPIO common configuration * * Configure GPIO's Mode,pull-up,PullDown,IntrType * * @param pGPIOConfig Pointer to GPIO configure struct * * @return * - ESP_OK success * - ESP_ERR_INVALID_ARG Parameter error * */ esp_err_t gpio_config(const gpio_config_t *pGPIOConfig); /** * @brief Reset an gpio to default state (select gpio function, enable pullup and disable input and output). * * @param gpio_num GPIO number. * * @note This function also configures the IOMUX for this pin to the GPIO * function, and disconnects any other peripheral output configured via GPIO * Matrix. * * @return Always return ESP_OK. */ esp_err_t gpio_reset_pin(gpio_num_t gpio_num); /** * @brief GPIO set interrupt trigger type * * @param gpio_num GPIO number. If you want to set the trigger type of e.g. of GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param intr_type Interrupt type, select from gpio_int_type_t * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error * */ esp_err_t gpio_set_intr_type(gpio_num_t gpio_num, gpio_int_type_t intr_type); /** * @brief Enable GPIO module interrupt signal * * @note ESP32: Please do not use the interrupt of GPIO36 and GPIO39 when using ADC or Wi-Fi and Bluetooth with sleep mode enabled. * Please refer to the comments of `adc1_get_raw`. * Please refer to Section 3.11 of <a href="https://espressif.com/sites/default/files/documentation/eco_and_workarounds_for_bugs_in_esp32_en.pdf">ESP32 ECO and Workarounds for Bugs</a> for the description of this issue. * * @param gpio_num GPIO number. If you want to enable an interrupt on e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error * */ esp_err_t gpio_intr_enable(gpio_num_t gpio_num); /** * @brief Disable GPIO module interrupt signal * * @note This function is allowed to be executed when Cache is disabled within ISR context, by enabling `CONFIG_GPIO_CTRL_FUNC_IN_IRAM` * * @param gpio_num GPIO number. If you want to disable the interrupt of e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * * @return * - ESP_OK success * - ESP_ERR_INVALID_ARG Parameter error * */ esp_err_t gpio_intr_disable(gpio_num_t gpio_num); /** * @brief GPIO set output level * * @note This function is allowed to be executed when Cache is disabled within ISR context, by enabling `CONFIG_GPIO_CTRL_FUNC_IN_IRAM` * * @param gpio_num GPIO number. If you want to set the output level of e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param level Output level. 0: low ; 1: high * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG GPIO number error * */ esp_err_t gpio_set_level(gpio_num_t gpio_num, uint32_t level); /** * @brief GPIO get input level * * @warning If the pad is not configured for input (or input and output) the returned value is always 0. * * @param gpio_num GPIO number. If you want to get the logic level of e.g. pin GPIO16, gpio_num should be GPIO_NUM_16 (16); * * @return * - 0 the GPIO input level is 0 * - 1 the GPIO input level is 1 * */ int gpio_get_level(gpio_num_t gpio_num); /** * @brief GPIO set direction * * Configure GPIO direction,such as output_only,input_only,output_and_input * * @param gpio_num Configure GPIO pins number, it should be GPIO number. If you want to set direction of e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param mode GPIO direction * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG GPIO error * */ esp_err_t gpio_set_direction(gpio_num_t gpio_num, gpio_mode_t mode); /** * @brief Configure GPIO pull-up/pull-down resistors * * @note ESP32: Only pins that support both input & output have integrated pull-up and pull-down resistors. Input-only GPIOs 34-39 do not. * * @param gpio_num GPIO number. If you want to set pull up or down mode for e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param pull GPIO pull up/down mode. * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG : Parameter error * */ esp_err_t gpio_set_pull_mode(gpio_num_t gpio_num, gpio_pull_mode_t pull); /** * @brief Enable GPIO wake-up function. * * @param gpio_num GPIO number. * * @param intr_type GPIO wake-up type. Only GPIO_INTR_LOW_LEVEL or GPIO_INTR_HIGH_LEVEL can be used. * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_wakeup_enable(gpio_num_t gpio_num, gpio_int_type_t intr_type); /** * @brief Disable GPIO wake-up function. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_wakeup_disable(gpio_num_t gpio_num); /** * @brief Register GPIO interrupt handler, the handler is an ISR. * The handler will be attached to the same CPU core that this function is running on. * * This ISR function is called whenever any GPIO interrupt occurs. See * the alternative gpio_install_isr_service() and * gpio_isr_handler_add() API in order to have the driver support * per-GPIO ISRs. * * @param fn Interrupt handler function. * @param arg Parameter for handler function * @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred) * ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info. * @param handle Pointer to return handle. If non-NULL, a handle for the interrupt will be returned here. * * \verbatim embed:rst:leading-asterisk * To disable or remove the ISR, pass the returned handle to the :doc:`interrupt allocation functions </api-reference/system/intr_alloc>`. * \endverbatim * * @return * - ESP_OK Success ; * - ESP_ERR_INVALID_ARG GPIO error * - ESP_ERR_NOT_FOUND No free interrupt found with the specified flags */ esp_err_t gpio_isr_register(void (*fn)(void *), void *arg, int intr_alloc_flags, gpio_isr_handle_t *handle); /** * @brief Enable pull-up on GPIO. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_pullup_en(gpio_num_t gpio_num); /** * @brief Disable pull-up on GPIO. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_pullup_dis(gpio_num_t gpio_num); /** * @brief Enable pull-down on GPIO. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_pulldown_en(gpio_num_t gpio_num); /** * @brief Disable pull-down on GPIO. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_pulldown_dis(gpio_num_t gpio_num); /** * @brief Install the GPIO driver's ETS_GPIO_INTR_SOURCE ISR handler service, which allows per-pin GPIO interrupt handlers. * * This function is incompatible with gpio_isr_register() - if that function is used, a single global ISR is registered for all GPIO interrupts. If this function is used, the ISR service provides a global GPIO ISR and individual pin handlers are registered via the gpio_isr_handler_add() function. * * @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred) * ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info. * * @return * - ESP_OK Success * - ESP_ERR_NO_MEM No memory to install this service * - ESP_ERR_INVALID_STATE ISR service already installed. * - ESP_ERR_NOT_FOUND No free interrupt found with the specified flags * - ESP_ERR_INVALID_ARG GPIO error */ esp_err_t gpio_install_isr_service(int intr_alloc_flags); /** * @brief Uninstall the driver's GPIO ISR service, freeing related resources. */ void gpio_uninstall_isr_service(void); /** * @brief Add ISR handler for the corresponding GPIO pin. * * Call this function after using gpio_install_isr_service() to * install the driver's GPIO ISR handler service. * * The pin ISR handlers no longer need to be declared with IRAM_ATTR, * unless you pass the ESP_INTR_FLAG_IRAM flag when allocating the * ISR in gpio_install_isr_service(). * * This ISR handler will be called from an ISR. So there is a stack * size limit (configurable as "ISR stack size" in menuconfig). This * limit is smaller compared to a global GPIO interrupt handler due * to the additional level of indirection. * * @param gpio_num GPIO number * @param isr_handler ISR handler function for the corresponding GPIO number. * @param args parameter for ISR handler. * * @return * - ESP_OK Success * - ESP_ERR_INVALID_STATE Wrong state, the ISR service has not been initialized. * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_isr_handler_add(gpio_num_t gpio_num, gpio_isr_t isr_handler, void *args); /** * @brief Remove ISR handler for the corresponding GPIO pin. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_STATE Wrong state, the ISR service has not been initialized. * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_isr_handler_remove(gpio_num_t gpio_num); /** * @brief Set GPIO pad drive capability * * @param gpio_num GPIO number, only support output GPIOs * @param strength Drive capability of the pad * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_set_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t strength); /** * @brief Get GPIO pad drive capability * * @param gpio_num GPIO number, only support output GPIOs * @param strength Pointer to accept drive capability of the pad * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_get_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t *strength); /** * @brief Enable gpio pad hold function. * * When a GPIO is set to hold, its state is latched at that moment and will not change when the internal * signal or the IO MUX/GPIO configuration is modified (including input enable, output enable, output value, * function, and drive strength values). This function can be used to retain the state of GPIOs when the chip * or system is reset, for example, when watchdog time-out or Deep-sleep events are triggered. * * This function works in both input and output modes, and only applicable to output-capable GPIOs. * If this function is enabled: * in output mode: the output level of the GPIO will be locked and can not be changed. * in input mode: the input read value can still reflect the changes of the input signal. * * However, on ESP32/S2/C3/S3/C2, this function cannot be used to hold the state of a digital GPIO during Deep-sleep. * Even if this function is enabled, the digital GPIO will be reset to its default state when the chip wakes up from * Deep-sleep. If you want to hold the state of a digital GPIO during Deep-sleep, please call `gpio_deep_sleep_hold_en`. * * Power down or call `gpio_hold_dis` will disable this function. * * @param gpio_num GPIO number, only support output-capable GPIOs * * @return * - ESP_OK Success * - ESP_ERR_NOT_SUPPORTED Not support pad hold function */ esp_err_t gpio_hold_en(gpio_num_t gpio_num); /** * @brief Disable gpio pad hold function. * * When the chip is woken up from Deep-sleep, the gpio will be set to the default mode, so, the gpio will output * the default level if this function is called. If you don't want the level changes, the gpio should be configured to * a known state before this function is called. * e.g. * If you hold gpio18 high during Deep-sleep, after the chip is woken up and `gpio_hold_dis` is called, * gpio18 will output low level(because gpio18 is input mode by default). If you don't want this behavior, * you should configure gpio18 as output mode and set it to hight level before calling `gpio_hold_dis`. * * @param gpio_num GPIO number, only support output-capable GPIOs * * @return * - ESP_OK Success * - ESP_ERR_NOT_SUPPORTED Not support pad hold function */ esp_err_t gpio_hold_dis(gpio_num_t gpio_num); #if !SOC_GPIO_SUPPORT_HOLD_SINGLE_IO_IN_DSLP /** * @brief Enable all digital gpio pads hold function during Deep-sleep. * * Enabling this feature makes all digital gpio pads be at the holding state during Deep-sleep. The state of each pad * holds is its active configuration (not pad's sleep configuration!). * * Note that this pad hold feature only works when the chip is in Deep-sleep mode. When the chip is in active mode, * the digital gpio state can be changed freely even you have called this function. * * After this API is being called, the digital gpio Deep-sleep hold feature will work during every sleep process. You * should call `gpio_deep_sleep_hold_dis` to disable this feature. */ void gpio_deep_sleep_hold_en(void); /** * @brief Disable all digital gpio pads hold function during Deep-sleep. */ void gpio_deep_sleep_hold_dis(void); #endif //!SOC_GPIO_SUPPORT_HOLD_SINGLE_IO_IN_DSLP /** * @brief Set pad input to a peripheral signal through the IOMUX. * @param gpio_num GPIO number of the pad. * @param signal_idx Peripheral signal id to input. One of the ``*_IN_IDX`` signals in ``soc/gpio_sig_map.h``. */ void gpio_iomux_in(uint32_t gpio_num, uint32_t signal_idx); /** * @brief Set peripheral output to an GPIO pad through the IOMUX. * @param gpio_num gpio_num GPIO number of the pad. * @param func The function number of the peripheral pin to output pin. * One of the ``FUNC_X_*`` of specified pin (X) in ``soc/io_mux_reg.h``. * @param oen_inv True if the output enable needs to be inverted, otherwise False. */ void gpio_iomux_out(uint8_t gpio_num, int func, bool oen_inv); #if SOC_GPIO_SUPPORT_FORCE_HOLD /** * @brief Force hold all digital and rtc gpio pads. * * GPIO force hold, no matter the chip in active mode or sleep modes. * * This function will immediately cause all pads to latch the current values of input enable, output enable, * output value, function, and drive strength values. * * @warning This function will hold flash and UART pins as well. Therefore, this function, and all code run afterwards * (till calling `gpio_force_unhold_all` to disable this feature), MUST be placed in internal RAM as holding the flash * pins will halt SPI flash operation, and holding the UART pins will halt any UART logging. * */ esp_err_t gpio_force_hold_all(void); /** * @brief Force unhold all digital and rtc gpio pads. * */ esp_err_t gpio_force_unhold_all(void); #endif /** * @brief Enable SLP_SEL to change GPIO status automantically in lightsleep. * @param gpio_num GPIO number of the pad. * * @return * - ESP_OK Success * */ esp_err_t gpio_sleep_sel_en(gpio_num_t gpio_num); /** * @brief Disable SLP_SEL to change GPIO status automantically in lightsleep. * @param gpio_num GPIO number of the pad. * * @return * - ESP_OK Success */ esp_err_t gpio_sleep_sel_dis(gpio_num_t gpio_num); /** * @brief GPIO set direction at sleep * * Configure GPIO direction,such as output_only,input_only,output_and_input * * @param gpio_num Configure GPIO pins number, it should be GPIO number. If you want to set direction of e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param mode GPIO direction * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG GPIO error */ esp_err_t gpio_sleep_set_direction(gpio_num_t gpio_num, gpio_mode_t mode); /** * @brief Configure GPIO pull-up/pull-down resistors at sleep * * @note ESP32: Only pins that support both input & output have integrated pull-up and pull-down resistors. Input-only GPIOs 34-39 do not. * * @param gpio_num GPIO number. If you want to set pull up or down mode for e.g. GPIO16, gpio_num should be GPIO_NUM_16 (16); * @param pull GPIO pull up/down mode. * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG : Parameter error */ esp_err_t gpio_sleep_set_pull_mode(gpio_num_t gpio_num, gpio_pull_mode_t pull); #if SOC_GPIO_SUPPORT_DEEPSLEEP_WAKEUP #define GPIO_IS_DEEP_SLEEP_WAKEUP_VALID_GPIO(gpio_num) ((gpio_num >= 0) && \ (((1ULL << (gpio_num)) & SOC_GPIO_DEEP_SLEEP_WAKE_VALID_GPIO_MASK) != 0)) /** * @brief Enable GPIO deep-sleep wake-up function. * * @param gpio_num GPIO number. * * @param intr_type GPIO wake-up type. Only GPIO_INTR_LOW_LEVEL or GPIO_INTR_HIGH_LEVEL can be used. * * @note Called by the SDK. User shouldn't call this directly in the APP. * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_deep_sleep_wakeup_enable(gpio_num_t gpio_num, gpio_int_type_t intr_type); /** * @brief Disable GPIO deep-sleep wake-up function. * * @param gpio_num GPIO number * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_deep_sleep_wakeup_disable(gpio_num_t gpio_num); #endif //SOC_GPIO_SUPPORT_DEEPSLEEP_WAKEUP /** * @brief Dump IO configuration information to console * * @param out_stream IO stream (e.g. stdout) * @param io_bit_mask IO pin bit mask, each bit maps to an IO * * @return * - ESP_OK Success * - ESP_ERR_INVALID_ARG Parameter error */ esp_err_t gpio_dump_io_configuration(FILE *out_stream, uint64_t io_bit_mask); #ifdef __cplusplus } #endif