61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
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#pragma once
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// Hyperion leddevice includes
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#include "LedRs232Device.h"
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///
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/// The LedDevice for controlling a string of WS2812B leds. These are controlled over the mini-UART
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/// of the RPi (/dev/ttyAMA0).
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///
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class LedDeviceWs2812b : public LedRs232Device
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{
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public:
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///
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/// Constructs the device (all required parameters are hardcoded)
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///
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LedDeviceWs2812b();
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///
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/// Write the color data the the WS2812B led string
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///
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/// @param ledValues The color data
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/// @return Zero on succes else negative
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///
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virtual int write(const std::vector<ColorRgb> & ledValues);
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///
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/// Write zero to all leds(that have been written by a previous write operation)
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///
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/// @return Zero on succes else negative
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///
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virtual int switchOff();
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private:
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///
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/// Translate a color to the signal bits. The resulting bits are written to the given memory.
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///
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/// @param color The color to translate
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/// @param signal The pointer at the beginning of the signal to write
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/// @return The pointer at the end of the written signal
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///
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uint8_t * color2signal(const ColorRgb & color, uint8_t * signal);
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///
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/// Translates three bits to a single byte
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///
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/// @param bit1 The value of the first bit (1=true, zero=false)
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/// @param bit2 The value of the second bit (1=true, zero=false)
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/// @param bit3 The value of the third bit (1=true, zero=false)
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///
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/// @return The output-byte for the given two bit
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///
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uint8_t bits2Signal(const bool bit1, const bool bit2, const bool bit3) const;
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///
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/// The output buffer for writing bytes to the output
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///
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std::vector<uint8_t> _ledBuffer;
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};
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