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80 lines
1.9 KiB
80 lines
1.9 KiB
/*
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* Copyright 2023 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#pragma once
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#include <stdint.h>
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#include <cstdint>
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#include <memory>
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#include "driver/spi_master.h"
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#include "lvgl/lvgl.h"
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#include "result.hpp"
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#include "tasks.hpp"
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#include "display_init.hpp"
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#include "gpios.hpp"
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namespace drivers {
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/*
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* LVGL display driver for ST77XX family displays.
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*/
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class Display {
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public:
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/*
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* Creates the display driver, and resets and reinitialises the display
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* over SPI. This never fails, since unfortunately these display don't give
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* us back any kind of signal to tell us we're actually using them correctly.
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*/
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static auto Create(IGpios& expander,
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const displays::InitialisationData& init_data) -> Display*;
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Display(IGpios& gpio, spi_device_handle_t handle);
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~Display();
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auto SetDisplayOn(bool) -> void;
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auto SetBrightness(uint_fast8_t) -> void;
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/* Driver callback invoked by LVGL when there is new data to display. */
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void OnLvglFlush(lv_disp_drv_t* disp_drv,
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const lv_area_t* area,
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lv_color_t* color_map);
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// Not copyable or movable.
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Display(const Display&) = delete;
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Display& operator=(const Display&) = delete;
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private:
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IGpios& gpio_;
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spi_device_handle_t handle_;
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bool display_on_;
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uint_fast8_t brightness_;
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lv_disp_draw_buf_t buffers_;
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lv_disp_drv_t driver_;
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lv_disp_t* display_ = nullptr;
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enum TransactionType {
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COMMAND = 0,
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DATA = 1,
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};
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void SendInitialisationSequence(const uint8_t* data);
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void SendCommandWithData(uint8_t command, const uint8_t* data, size_t length);
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void SendCmd(const uint8_t* data, size_t length);
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void SendData(const uint8_t* data, size_t length);
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void SendTransaction(TransactionType type,
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const uint8_t* data,
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size_t length);
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auto SetDutyCycle(uint_fast8_t, bool) -> void;
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};
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} // namespace drivers
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