i2c_bus_esp_idf.h

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#pragma once
 
#ifdef USE_ESP32
 
#include "esphome/core/component.h"
#include "i2c_bus.h"
#include <driver/i2c_master.h>
 
namespace esphome::i2c {
 
enum RecoveryCode {
  RECOVERY_FAILED_SCL_LOW,
  RECOVERY_FAILED_SDA_LOW,
  RECOVERY_COMPLETED,
};
 
class IDFI2CBus final : public InternalI2CBus, public Component {
 public:
  void setup() override;
  void dump_config() override;
  ErrorCode write_readv(uint8_t address, const uint8_t *write_buffer, size_t write_count, uint8_t *read_buffer,
                        size_t read_count) override;
  float get_setup_priority() const override { return setup_priority::BUS; }
 
  void set_scan(bool scan) { this->scan_ = scan; }
  void set_sda_pin(uint8_t sda_pin) { this->sda_pin_ = sda_pin; }
  void set_sda_pullup_enabled(bool sda_pullup_enabled) { this->sda_pullup_enabled_ = sda_pullup_enabled; }
  void set_scl_pin(uint8_t scl_pin) { this->scl_pin_ = scl_pin; }
  void set_scl_pullup_enabled(bool scl_pullup_enabled) { this->scl_pullup_enabled_ = scl_pullup_enabled; }
  void set_frequency(uint32_t frequency) { this->frequency_ = frequency; }
  void set_timeout(uint32_t timeout) { this->timeout_ = timeout; }
#if SOC_LP_I2C_SUPPORTED
  void set_lp_mode(bool lp_mode) { this->lp_mode_ = lp_mode; }
#endif
 
  int get_port() const override { return this->port_; }
#ifdef I2C_PORT_FREQUENCY_COUNT
  void add_frequency(uint32_t frequency);
  ErrorCode switch_frequency(uint32_t frequency) override;
  uint32_t get_frequency() const override { return this->frequency_; }
#endif
 
 private:
  void recover_();
  i2c_master_dev_handle_t add_device_(uint32_t frequency);
  RecoveryCode recovery_result_{};
 
 protected:
  i2c_master_dev_handle_t dev_{};
#ifdef I2C_PORT_FREQUENCY_COUNT
  // One handle per frequency used on the bus, registered at code generation
  struct FrequencyDevice {
    uint32_t frequency;
    i2c_master_dev_handle_t dev;
  };
  StaticVector<FrequencyDevice, I2C_PORT_FREQUENCY_COUNT + 1> devices_;
#endif
  i2c_master_bus_handle_t bus_{};
  i2c_port_t port_{};
  uint8_t sda_pin_{};
  bool sda_pullup_enabled_{};
  uint8_t scl_pin_{};
  bool scl_pullup_enabled_{};
  uint32_t frequency_{};
  uint32_t timeout_ = 0;
  bool initialized_ = false;
#if SOC_LP_I2C_SUPPORTED
  bool lp_mode_ = false;
#endif
};
 
}  // namespace esphome::i2c
 
#endif  // USE_ESP32