tca9548a.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/components/i2c/i2c.h"
 
namespace esphome::tca9548a {
 
static const uint8_t TCA9548A_DISABLE_CHANNELS_COMMAND = 0x00;
 
class TCA9548AComponent;
class TCA9548AChannel final : public i2c::I2CBus {
 public:
  void set_channel(uint8_t channel) { this->channel_ = channel; }
  void set_parent(TCA9548AComponent *parent) { this->parent_ = parent; }
 
  i2c::ErrorCode write_readv(uint8_t address, const uint8_t *write_buffer, size_t write_count, uint8_t *read_buffer,
                             size_t read_count) override;
 
#ifdef I2C_PORT_FREQUENCY_COUNT
  void set_frequency(uint32_t frequency) { this->frequency_ = frequency; }
  i2c::ErrorCode switch_frequency(uint32_t frequency) override;
  uint32_t get_frequency() const override;
#endif
 
 protected:
#ifdef I2C_PORT_FREQUENCY_COUNT
  uint32_t select_frequency_() const;
  uint32_t transfer_frequency_() const;
  i2c::ErrorCode write_readv_at_port_frequency_(uint32_t select_frequency, uint8_t address, const uint8_t *write_buffer,
                                                size_t write_count, uint8_t *read_buffer, size_t read_count);
  i2c::ErrorCode transfer_(uint32_t select_frequency, uint8_t address, const uint8_t *write_buffer, size_t write_count,
                           uint8_t *read_buffer, size_t read_count);
  i2c::ErrorCode switch_bus_(uint32_t frequency);
  uint32_t frequency_{0};
#endif
  uint8_t channel_;
  TCA9548AComponent *parent_;
};
 
class TCA9548AComponent final : public Component, public i2c::I2CDevice {
 public:
  void setup() override;
  void dump_config() override;
  float get_setup_priority() const override { return setup_priority::IO; }
  void update();
 
  i2c::ErrorCode switch_to_channel(uint8_t channel);
  void disable_all_channels();
#ifdef I2C_PORT_FREQUENCY_COUNT
  void set_frequency(uint32_t frequency) { this->frequency_ = frequency; }
#endif
 
 protected:
  friend class TCA9548AChannel;
#ifdef I2C_PORT_FREQUENCY_COUNT
  uint32_t frequency_{0};
#endif
};
}  // namespace esphome::tca9548a