gpio.h

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#pragma once
 
#include <string>
#include <vector>
#include <driver/gpio.h>
#include <freertos/FreeRTOS.h>
#include "include/log_sources.h"

namespace HAL::GPIO {
    enum class level_t : uint8_t {
        LOW = 0,
        HIGH = 1
    };
 
    struct pin_config_t {
        gpio_num_t gpio_pin;
        gpio_mode_t mode;
        gpio_pull_mode_t pull_mode;
        gpio_int_type_t intr_type;
    };
 
    struct fast_gpio_path_t {
        volatile uint32_t* set_register;
        volatile uint32_t* clear_register;
        uint32_t pin_mask;
    };

    class Controller {
    private:
        static constexpr const char* TAG = "HAL::GPIO";
        static constexpr log_source LOG_SOURCE = LOG_SOURCE_HAL_GPIO;
 
        mutable SemaphoreHandle_t mutex;
 
        struct saved_config_entry_t {
            gpio_num_t gpio_pin;
            gpio_mode_t mode;
        };
 
        std::vector<saved_config_entry_t> registered_entries;
 
    private:
        explicit Controller();
        ~Controller();
 
    public:
        Controller(const Controller&) = delete;
        Controller& operator=(const Controller&) = delete;

        static Controller& get_instance() {
            static Controller _instance;
            return _instance;
        }

        void enable_interrupts() const;

        void shutdown();

        void add(const pin_config_t& entry);

        void set_level(gpio_num_t gpio_pin, level_t level) const;

        [[nodiscard]] level_t get_level(gpio_num_t gpio_pin) const;

        [[nodiscard]] fast_gpio_path_t get_fast_path_data(gpio_num_t gpio_pin) const;
    };
}