100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
#pragma once
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "esp_lcd_touch_gt911.h"
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#include "common/semaphore_guard.h"
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#include <vector>
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#include <atomic>
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#include "epd_handler.h"
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// Refresh mode configuration
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#define PARTIAL_REFRESH_THRESHOLD 10 // Full refresh every N partial refreshes
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#define DISPLAY_WIDTH 800
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#define DISPLAY_HEIGHT 480
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// forward declarations
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class EInkDisplayHandler;
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struct RefreshArea {
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public:
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RefreshArea(int32_t x_start, int32_t y_start, int32_t x_end, int32_t y_end)
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: x1(x_start), y1(y_start), x2(x_end), y2(y_end) { }
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int32_t x1;
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int32_t y1;
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int32_t x2;
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int32_t y2;
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// reset to empty area
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void reset() {
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x1 = y1 = x2 = y2 = 0;
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}
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// expand area to include another area
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void expand_to_include(const RefreshArea& other) {
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expand_to_include(other.x1, other.y1, other.x2, other.y2);
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}
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void expand_to_include(int32_t x1, int32_t y1, int32_t x2, int32_t y2) {
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const bool force_update = is_empty();
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if (x1 < this->x1 || force_update) this->x1 = x1;
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if (y1 < this->y1 || force_update) this->y1 = y1;
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if (x2 > this->x2 || force_update) this->x2 = x2;
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if (y2 > this->y2 || force_update) this->y2 = y2;
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}
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bool is_empty() const {
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return (x1 == 0 && y1 == 0 && x2 == 0 && y2 == 0);
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}
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uint32_t area() const {
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if (is_empty()) return 0;
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return (x2 - x1 + 1) * (y2 - y1 + 1);
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}
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};
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class EInkDisplayHandler {
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public:
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EInkDisplayHandler();
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virtual ~EInkDisplayHandler();
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esp_err_t init_devices(EventGroupHandle_t system_event_group = nullptr);
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esp_err_t refresh_display(void);
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esp_err_t full_write(const uint8_t* framebuffer, const bool white_basemap = true);
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esp_err_t partial_refresh(const uint8_t* framebuffer, const RefreshArea& area, const bool is_last_partial_update = true);
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esp_err_t clear_display(void);
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esp_err_t deep_sleep_display(void);
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// Request a full refresh on next flush
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void request_full_refresh(void);
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bool is_busy() {
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return epd_handler_.is_busy();
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}
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esp_lcd_touch_handle_t get_touch_handle() const { return tp_handle_; }
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private:
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esp_err_t init_display_pins_(void);
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esp_err_t epd_init_internal_(uint32_t transaction_id); // full fast refresh init
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esp_err_t epd_init_partial_internal_(uint32_t transaction_id); // partial refresh init (within existing transaction)
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esp_err_t init_touch_(void);
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// write to the internal draw buffer
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void write_to_buffer_(const uint8_t* src, const RefreshArea& area);
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// write the internal draw buffer to the display's old sram
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esp_err_t refresh_old_buffer_(uint32_t transaction_id);
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EPDHandler epd_handler_;
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uint32_t partial_refresh_count_ = 0;
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bool force_full_refresh_ = false;
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std::atomic<bool> is_deep_sleep_ { false };
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SemaphoreHandle_t refresh_mutex_ = nullptr;
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esp_lcd_panel_io_handle_t tp_io_handle_ = nullptr;
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esp_lcd_touch_handle_t tp_handle_ = nullptr;
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// this buffer reflects the current display state (1=black, 0=white)
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uint8_t* draw_buffer_ = nullptr;
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uint8_t* old_buffer_ = nullptr;
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RefreshArea refresh_area_ = { 0, 0, 0, 0 };
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};
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