i2c_bus_arduino.h

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#pragma once
 
#ifdef USE_ARDUINO
 
#include "i2c_bus.h"
#include "esphome/core/component.h"
#include <Wire.h>
 
namespace esphome {
namespace i2c {
 
enum RecoveryCode {
  RECOVERY_FAILED_SCL_LOW,
  RECOVERY_FAILED_SDA_LOW,
  RECOVERY_COMPLETED,
};
 
class ArduinoI2CBus : public I2CBus, public Component {
 public:
  void setup() override;
  void dump_config() override;
  ErrorCode readv(uint8_t address, ReadBuffer *buffers, size_t cnt) override;
  ErrorCode writev(uint8_t address, WriteBuffer *buffers, size_t cnt, bool stop) override;
  float get_setup_priority() const override { return setup_priority::BUS; }
 
  void set_scan(bool scan) { scan_ = scan; }
  void set_sda_pin(uint8_t sda_pin) { sda_pin_ = sda_pin; }
  void set_scl_pin(uint8_t scl_pin) { scl_pin_ = scl_pin; }
  void set_frequency(uint32_t frequency) { frequency_ = frequency; }
  void set_timeout(uint32_t timeout) { timeout_ = timeout; }
 
 private:
  void recover_();
  void set_pins_and_clock_();
  RecoveryCode recovery_result_;
 
 protected:
  TwoWire *wire_;
  uint8_t sda_pin_;
  uint8_t scl_pin_;
  uint32_t frequency_;
  uint32_t timeout_ = 0;
  bool initialized_ = false;
};
 
}  // namespace i2c
}  // namespace esphome
 
#endif  // USE_ARDUINO