gpio.hpp

[詳解]

#pragma once
 
#include "main.h"
 
#include <array>
#include <cstdint>
#include <functional>
 
#include "tutrcos/utility.hpp"
 
namespace tutrcos {
namespace peripheral {
 
class GPIO {
public:
  GPIO(GPIO_TypeDef *port, uint16_t pin) : port_{port}, pin_{pin} {
    auto gpio =
        std::find(get_instances().begin(), get_instances().end(), nullptr);
    TUTRCOS_VERIFY(gpio != get_instances().end());
    *gpio = this;
  }
 
  ~GPIO() {
    auto gpio = std::find(get_instances().begin(), get_instances().end(), this);
    TUTRCOS_VERIFY(gpio != get_instances().end());
    *gpio = nullptr;
  }
 
  void write(bool state) {
    HAL_GPIO_WritePin(port_, pin_, static_cast<GPIO_PinState>(state));
  }
 
  bool read() { return HAL_GPIO_ReadPin(port_, pin_); }
 
  void toggle() { HAL_GPIO_TogglePin(port_, pin_); }
 
  void set_callback(std::function<void()> &&callback) {
    callback_ = std::move(callback);
  }
 
  GPIO_TypeDef *get_hal_port() { return port_; }
 
  uint16_t get_hal_pin() { return pin_; }
 
private:
  GPIO_TypeDef *port_;
  uint16_t pin_;
  std::function<void()> callback_;
 
  static inline std::array<GPIO *, 20> &get_instances() {
    static std::array<GPIO *, 20> instances{};
    return instances;
  }
 
  friend void ::HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin);
};
 
} // namespace peripheral
} // namespace tutrcos