Function esp_idf_sys::gpio_isr_handler_add

pub unsafe extern "C" fn gpio_isr_handler_add(
    gpio_num: gpio_num_t,
    isr_handler: gpio_isr_t,
    args: *mut c_void,
) -> esp_err_t

@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