i2c_bus_host.h

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#pragma once
 
#ifdef USE_HOST
 
#include "esphome/core/component.h"
#include "esphome/core/log.h"
#include "i2c_bus.h"
 
namespace esphome::i2c {
 
class HostI2CBus final : public I2CBus, public Component {
 public:
  ~HostI2CBus() override;
 
  void setup() override;
  void dump_config() override;
  float get_setup_priority() const override { return setup_priority::BUS; }
 
  ErrorCode write_readv(uint8_t address, const uint8_t *write_buffer, size_t write_count, uint8_t *read_buffer,
                        size_t read_count) override;
 
  void set_device(const std::string &device) { this->device_ = device; }
  void set_scan(bool scan) { this->scan_ = scan; }
 
  void set_frequency(uint32_t frequency) { this->frequency_ = frequency; }
#ifdef I2C_PORT_FREQUENCY_COUNT
  // The kernel driver owns the clock, so switch_frequency keeps the base default
  uint32_t get_frequency() const override { return this->frequency_; }
#endif
 
  const std::string &get_device() const { return this->device_; }
 
 protected:
  void update_error_(const std::string &error);
  ErrorCode map_errno_to_error_code_(int err);
 
  std::string device_;
  uint32_t frequency_{50000};
  int file_descriptor_{-1};
  bool initialized_{false};
  std::string first_error_;
};
 
}  // namespace esphome::i2c
 
#endif  // USE_HOST