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52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/display/display_buffer.h"
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#include "esphome/components/spi/spi.h"
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namespace esphome {
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namespace st7920 {
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class ST7920;
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using st7920_writer_t = std::function<void(ST7920 &)>;
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class ST7920 : public PollingComponent,
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public display::DisplayBuffer,
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public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_HIGH, spi::CLOCK_PHASE_TRAILING,
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spi::DATA_RATE_200KHZ> {
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public:
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void set_writer(st7920_writer_t &&writer) { this->writer_local_ = writer; }
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void set_height(uint16_t height) { this->height_ = height; }
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void set_width(uint16_t width) { this->width_ = width; }
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// ========== INTERNAL METHODS ==========
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// (In most use cases you won't need these)
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void setup() override;
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void dump_config() override;
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float get_setup_priority() const override;
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void update() override;
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void fill(Color color) override;
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void write_display_data();
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display::DisplayType get_display_type() override { return display::DisplayType::DISPLAY_TYPE_BINARY; }
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protected:
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void draw_absolute_pixel_internal(int x, int y, Color color) override;
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int get_height_internal() override;
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int get_width_internal() override;
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size_t get_buffer_length_();
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void display_init_();
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void command_(uint8_t value);
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void data_(uint8_t value);
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void send_(uint8_t type, uint8_t value);
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void goto_xy_(uint16_t x, uint16_t y);
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void start_transaction_();
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void end_transaction_();
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int16_t width_ = 128, height_ = 64;
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optional<st7920_writer_t> writer_local_{};
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};
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} // namespace st7920
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} // namespace esphome
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