pca9685_output.h

Go to the documentation of this file.

#pragma once
 
#include "esphome/core/component.h"
#include "esphome/components/output/float_output.h"
#include "esphome/components/i2c/i2c.h"
 
namespace esphome::pca9685 {
 
enum class PhaseBalancer {
  NONE = 0x00,
  LINEAR = 0x01,
};
 
inline constexpr uint8_t PCA9685_MODE_INVERTED = 0x10;
inline constexpr uint8_t PCA9685_MODE_OUTPUT_ONACK = 0x08;
inline constexpr uint8_t PCA9685_MODE_OUTPUT_TOTEM_POLE = 0x04;
inline constexpr uint8_t PCA9685_MODE_OUTNE_HIGHZ = 0x02;
inline constexpr uint8_t PCA9685_MODE_OUTNE_LOW = 0x01;
 
class PCA9685Output;
 
class PCA9685Channel : public output::FloatOutput {
 public:
  void set_channel(uint8_t channel) { channel_ = channel; }
  void set_parent(PCA9685Output *parent) { parent_ = parent; }
 
 protected:
  friend class PCA9685Output;
 
  void write_state(float state) override;
 
  uint8_t channel_;
  PCA9685Output *parent_;
};
 
class PCA9685Output : public Component, public i2c::I2CDevice {
 public:
  PCA9685Output(uint8_t mode = PCA9685_MODE_OUTPUT_ONACK | PCA9685_MODE_OUTPUT_TOTEM_POLE) : mode_(mode) {}
 
  void register_channel(PCA9685Channel *channel);
 
  void setup() override;
  void dump_config() override;
  float get_setup_priority() const override { return setup_priority::HARDWARE; }
  void loop() override;
  void set_extclk(bool extclk) { this->extclk_ = extclk; }
  void set_frequency(float frequency) { this->frequency_ = frequency; }
  void set_phase_balancer(PhaseBalancer balancer) { this->balancer_ = balancer; }
 
 protected:
  friend PCA9685Channel;
 
  void set_channel_value_(uint8_t channel, uint16_t value) {
    if (this->pwm_amounts_[channel] != value)
      this->update_ = true;
    this->pwm_amounts_[channel] = value;
  }
 
  float frequency_;
  uint8_t mode_;
  bool extclk_ = false;
  PhaseBalancer balancer_ = PhaseBalancer::LINEAR;
 
  uint8_t min_channel_{0xFF};
  uint8_t max_channel_{0x00};
  uint16_t pwm_amounts_[16] = {
      0,
  };
  bool update_{true};
};
 
}  // namespace esphome::pca9685