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#pragma once
#include <cstdint>
#include <memory>
#include "driver/spi_master.h"
#include "lvgl/lvgl.h"
#include "result.hpp"
#include "display_init.hpp"
#include "gpio_expander.hpp"
namespace drivers {
/*
* LVGL display driver for ST77XX family displays.
*/
class Display {
public:
/*
* Creates the display driver, and resets and reinitialises the display
* over SPI. This never fails, since unfortunately these display don't give
* us back any kind of signal to tell us we're actually using them correctly.
*/
static auto create(GpioExpander* expander,
const displays::InitialisationData& init_data)
-> std::unique_ptr<Display>;
Display(GpioExpander* gpio, spi_device_handle_t handle);
~Display();
/* Driver callback invoked by LVGL when there is new data to display. */
void OnLvglFlush(lv_disp_drv_t* disp_drv,
const lv_area_t* area,
lv_color_t* color_map);
private:
GpioExpander* gpio_;
spi_device_handle_t handle_;
lv_disp_draw_buf_t buffers_;
lv_disp_drv_t driver_;
lv_disp_t* display_ = nullptr;
enum TransactionType {
COMMAND = 0,
DATA = 1,
};
void SendInitialisationSequence(const uint8_t* data);
void SendCommandWithData(uint8_t command, const uint8_t* data, size_t length);
void SendCmd(const uint8_t* data, size_t length);
void SendData(const uint8_t* data, size_t length);
void SendTransaction(TransactionType type,
const uint8_t* data,
size_t length);
};
} // namespace drivers
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