mirror of
https://github.com/hyperion-project/hyperion.ng.git
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bd6e0f0d2a
Former-commit-id: 102e394d445abed39444dd5f9519ff8bda50d7e9
138 lines
3.3 KiB
C++
138 lines
3.3 KiB
C++
#pragma once
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// STL includes
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#include <cassert>
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// Local hyperion includes
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#include "LedRs232Device.h"
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namespace ws2811
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{
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/**
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* Enumaration of known signal timings
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*/
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enum SignalTiming
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{
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option_3755,
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option_3773,
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option_2855,
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option_2882,
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not_a_signaltiming
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};
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enum SpeedMode
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{
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lowspeed,
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highspeed
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};
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/**
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* Enumeration of the signal 'parts' (T 0 high, T 1 high, T 0 low, T 1 low).
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*/
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enum TimeOption
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{
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T0H,
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T1H,
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T0L,
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T1L
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};
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/**
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* Structure holding the signal for a signle byte
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*/
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struct ByteSignal
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{
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uint8_t bit_1;
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uint8_t bit_2;
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uint8_t bit_3;
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uint8_t bit_4;
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uint8_t bit_5;
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uint8_t bit_6;
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uint8_t bit_7;
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uint8_t bit_8;
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};
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// Make sure the structure is exatly the length we require
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static_assert(sizeof(ByteSignal) == 8, "Incorrect sizeof ByteSignal (expected 8)");
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/**
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* Translates a string to a signal timing
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*
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* @param signalTiming The string specifying the signal timing
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* @param defaultValue The default value (used if the string does not match any known timing)
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*
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* @return The SignalTiming (or not_a_signaltiming if it did not match)
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*/
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SignalTiming fromString(const std::string& signalTiming, const SignalTiming defaultValue);
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/**
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* Returns the required baudrate for a specific signal-timing
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*
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* @param SpeedMode The WS2811/WS2812 speed mode (WS2812b only has highspeed)
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*
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* @return The required baudrate for the signal timing
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*/
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unsigned getBaudrate(const SpeedMode speedMode);
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/**
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* The number of 'signal units' (bits) For the subpart of a specific timing scheme
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*
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* @param timing The controller option
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* @param option The signal part
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*/
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unsigned getLength(const SignalTiming timing, const TimeOption option);
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/**
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* Constructs a 'bit' based signal with defined 'high' length (and implicite defined 'low'
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* length. The signal is based on a 10bits bytes (incl. high startbit and low stopbit). The
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* total length of the high is given as parameter:<br>
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* lenHigh=7 => |-------|___| => 1 1111 1100 0 => 252 (start and stop bit are implicite)
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*
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* @param lenHigh The total length of the 'high' length (incl start-bit)
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* @return The byte representing the high-low signal
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*/
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uint8_t bitToSignal(unsigned lenHigh);
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/**
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* Translate a byte into signal levels for a specific WS2811 option
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*
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* @param ledOption The WS2811 configuration
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* @param byte The byte to translate
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*
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* @return The signal for the given byte (one byte per bit)
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*/
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ByteSignal translate(SignalTiming ledOption, uint8_t byte);
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}
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class LedDeviceWs2811 : public LedRs232Device
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{
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public:
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///
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/// Constructs the LedDevice with Ws2811 attached via a serial port
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///
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/// @param outputDevice The name of the output device (eg '/dev/ttyS0')
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/// @param fastDevice The used baudrate for writing to the output device
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///
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LedDeviceWs2811(const std::string& outputDevice);
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///
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/// Writes the led color values to the led-device
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///
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/// @param ledValues The color-value per led
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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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/// Switch the leds off
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virtual int switchOff();
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private:
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void fillEncodeTable(const ws2811::SignalTiming ledOption);
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/** Translation table of byte to signal */
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std::vector<ws2811::ByteSignal> _byteToSignalTable;
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/// The buffer containing the packed RGB values
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std::vector<ws2811::ByteSignal> _ledBuffer;
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};
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