pcf8574_display.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/components/lcd_base/lcd_display.h"
#include "esphome/components/i2c/i2c.h"
#include "esphome/components/display/display.h"
 
namespace esphome::lcd_pcf8574 {
 
class PCF8574LCDDisplay;
 
using pcf8574_lcd_writer_t = display::DisplayWriter<PCF8574LCDDisplay>;
 
class PCF8574LCDDisplay : public lcd_base::LCDDisplay, public i2c::I2CDevice {
 public:
  void set_writer(pcf8574_lcd_writer_t &&writer) { this->writer_ = std::move(writer); }
  void setup() override;
  void dump_config() override;
  void backlight();
  void no_backlight();
 
 protected:
  bool is_four_bit_mode() override { return true; }
  void write_n_bits(uint8_t value, uint8_t n) override;
  void send(uint8_t value, bool rs) override;
 
  void call_writer() override { this->writer_(*this); }
 
  // Stores the current state of the backlight.
  uint8_t backlight_value_;
  pcf8574_lcd_writer_t writer_;
};
 
}  // namespace esphome::lcd_pcf8574