hyperion.ng/libsrc/leddevice/LedDeviceWS281x.h
penfold42 e352dea7a6 Added support to invert the WS281x LED data.
This supports level shifters that invert the data
Config option - "invert" (integer)
if omitted, do not invert
if == 0, do not invert
if !=0, invert


Former-commit-id: 44ab64329641f0e1450174314a955d241641d149
2016-03-21 15:43:30 +11:00

45 lines
1.1 KiB
C++

#ifndef LEDDEVICEWS281X_H_
#define LEDDEVICEWS281X_H_
#pragma once
#include <leddevice/LedDevice.h>
#include <ws2811.h>
class LedDeviceWS281x : public LedDevice
{
public:
///
/// Constructs the LedDevice for WS281x (one wire 800kHz)
///
/// @param gpio The gpio pin to use (BCM chip counting, default is 18)
/// @param leds The number of leds attached to the gpio pin
/// @param freq The target frequency for the data line, default is 800000
/// @param dmanum The DMA channel to use, default is 5
/// @param invert Invert the output line to support an inverting level shifter
///
LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, const int dmanum, const int invert);
///
/// Destructor of the LedDevice, waits for DMA to complete and then cleans up
///
~LedDeviceWS281x();
///
/// Writes the led color values to the led-device
///
/// @param ledValues The color-value per led
/// @return Zero on succes else negative
///
virtual int write(const std::vector<ColorRgb> &ledValues);
/// Switch the leds off
virtual int switchOff();
private:
ws2811_t led_string;
bool initialized;
};
#endif /* LEDDEVICEWS281X_H_ */