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
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
#ifndef LOW_LEVEL_DISPLAY_ST7796_H
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#define LOW_LEVEL_DISPLAY_ST7796_H
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#include "low_level_display.h"
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#include "st7796.h"
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class LowLevelDisplayST7796 : public LowLevelDisplay {
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private:
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const st7796_config* config;
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int width;
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int height;
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bool initialized;
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uint16_t* rgb_buffer; // Persistent buffer for 1-bit to RGB565 conversion
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bool invert_color; // If true, swap black/white
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public:
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LowLevelDisplayST7796(const st7796_config* cfg, int w, int h, bool invert = false);
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~LowLevelDisplayST7796() override;
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// Core display operations - converts 1-bit to RGB565 internally
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bool init() override;
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void clear(bool white = true) override;
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void draw_pixel(int x, int y, bool white) override;
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void draw_buffer(const uint8_t* bit_buffer) override;
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void refresh() override;
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// Display properties
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int get_width() const override { return width; }
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int get_height() const override { return height; }
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DisplayType get_type() const override { return DISPLAY_TYPE_ST7796; }
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bool is_color() const override { return true; }
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// Backlight control
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void set_backlight(bool on) override;
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// Brightness control (0-100)
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void set_brightness(uint8_t brightness) override;
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uint8_t get_brightness() const override;
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// Power management
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void sleep(); // Put display to sleep (low power, touch still active)
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void wake(); // Wake display from sleep
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// Orientation control
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void set_rotation(uint8_t rotation) override;
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// Color inversion control
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void set_invert_color(bool inv) { invert_color = inv; }
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bool get_invert_color() const { return invert_color; }
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};
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#endif // LOW_LEVEL_DISPLAY_ST7796_H
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