pcd_8544.h

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#pragma once

#include "esphome/core/component.h"
#include "esphome/components/spi/spi.h"
#include "esphome/components/display/display_buffer.h"

namespace esphome {
namespace pcd8544 {

class PCD8544 : public PollingComponent,
                public display::DisplayBuffer,
                public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_HIGH, spi::CLOCK_PHASE_TRAILING,
                                      spi::DATA_RATE_8MHZ> {
 public:
  const uint8_t PCD8544_POWERDOWN = 0x04;
  const uint8_t PCD8544_ENTRYMODE = 0x02;
  const uint8_t PCD8544_EXTENDEDINSTRUCTION = 0x01;

  const uint8_t PCD8544_DISPLAYBLANK = 0x0;
  const uint8_t PCD8544_DISPLAYNORMAL = 0x4;
  const uint8_t PCD8544_DISPLAYALLON = 0x1;
  const uint8_t PCD8544_DISPLAYINVERTED = 0x5;

  const uint8_t PCD8544_FUNCTIONSET = 0x20;
  const uint8_t PCD8544_DISPLAYCONTROL = 0x08;
  const uint8_t PCD8544_SETYADDR = 0x40;
  const uint8_t PCD8544_SETXADDR = 0x80;

  const uint8_t PCD8544_SETTEMP = 0x04;
  const uint8_t PCD8544_SETBIAS = 0x10;
  const uint8_t PCD8544_SETVOP = 0x80;
  uint8_t contrast_;

  void set_dc_pin(GPIOPin *dc_pin) { this->dc_pin_ = dc_pin; }
  void set_reset_pin(GPIOPin *reset) { this->reset_pin_ = reset; }
  void set_contrast(uint8_t contrast) { this->contrast_ = contrast; }
  float get_setup_priority() const override { return setup_priority::PROCESSOR; }

  void command(uint8_t value);
  void data(uint8_t value);

  void initialize();
  void dump_config() override;
  void HOT display();

  void update() override;

  void fill(Color color) override;

  void setup() override {
    this->setup_pins_();
    this->initialize();
  }

  display::DisplayType get_display_type() override { return display::DisplayType::DISPLAY_TYPE_BINARY; }

 protected:
  void draw_absolute_pixel_internal(int x, int y, Color color) override;

  void setup_pins_();

  void init_reset_();

  size_t get_buffer_length_();

  void start_command_();
  void end_command_();
  void start_data_();
  void end_data_();

  int get_width_internal() override;
  int get_height_internal() override;

  GPIOPin *reset_pin_;
  GPIOPin *dc_pin_;
};

}  // namespace pcd8544
}  // namespace esphome