37 lines
794 B
C++
37 lines
794 B
C++
#pragma once
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#include <cstdint>
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#include <functional>
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#include <driver/gpio.h>
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#include <esp_timer.h>
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class Backlight {
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public:
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Backlight();
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~Backlight();
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void RestoreBrightness();
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void SetBrightness(uint8_t brightness, bool permanent = false);
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inline uint8_t brightness() const { return brightness_; }
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protected:
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void OnTransitionTimer();
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virtual void SetBrightnessImpl(uint8_t brightness) = 0;
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esp_timer_handle_t transition_timer_ = nullptr;
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uint8_t brightness_ = 0;
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uint8_t target_brightness_ = 0;
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uint8_t step_ = 1;
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};
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class PwmBacklight : public Backlight {
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public:
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PwmBacklight(gpio_num_t pin, bool output_invert = false, uint32_t freq_hz = 25000);
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~PwmBacklight();
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void SetBrightnessImpl(uint8_t brightness) override;
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};
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