8cbb95b181
- Added PWM brightness control to ST7796 driver (0-100%) - Implemented hardware sleep mode for ST7796 (saves ~150mA) - Added sleep/wake functions preserving framebuffer and settings - Implemented timer-based inactivity detection (checks every 10s) - Auto-sleep after 5 minutes of no user input - Touch controller remains active during TFT sleep for instant wake - E-ink display also sleeps after timeout, requires re-init on wake - Added hardware_pwm library dependency to CMakeLists.txt - Brightness and sleep/wake methods exposed through display abstraction layer
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
#ifndef LOW_LEVEL_DISPLAY_H
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#define LOW_LEVEL_DISPLAY_H
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#include <stdint.h>
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#include <stdbool.h>
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// Display type enumeration
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typedef enum {
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DISPLAY_TYPE_ST7796,
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DISPLAY_TYPE_ST7789,
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DISPLAY_TYPE_EPAPER
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} DisplayType;
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// Abstract display interface
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class LowLevelDisplay {
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public:
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virtual ~LowLevelDisplay() {}
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// Core display operations - all work with 1-bit monochrome buffers
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virtual bool init() = 0;
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virtual void clear(bool white = true) = 0; // Clear to white or black
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virtual void draw_pixel(int x, int y, bool white) = 0;
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virtual void draw_buffer(const uint8_t* bit_buffer) = 0; // 1-bit buffer (width*height/8 bytes)
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virtual void refresh() = 0; // Update display (converts 1-bit to native format)
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// Display properties
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virtual int get_width() const = 0;
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virtual int get_height() const = 0;
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virtual DisplayType get_type() const = 0;
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virtual bool is_color() const = 0;
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// Optional: Backlight control (if supported)
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virtual void set_backlight(bool on) { (void)on; }
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// Optional: Brightness control (if supported)
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// brightness: 0-100 (percentage), 0=off, 100=full brightness
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virtual void set_brightness(uint8_t brightness) { (void)brightness; }
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virtual uint8_t get_brightness() const { return 100; } // Default to full brightness
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// Optional: Orientation control (not commonly needed for bitmap displays)
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virtual void set_rotation(uint8_t rotation) { (void)rotation; }
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// Factory method - creates display based on type, using board_config.h for pins
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static LowLevelDisplay* create(DisplayType type, int width, int height);
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};
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#endif // LOW_LEVEL_DISPLAY_H
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