hyperion.ng/libsrc/leddevice/LedDeviceAtmo.cpp

// STL includes
#include <cstring>
#include <cstdio>
#include <iostream>

// Linux includes
#include <fcntl.h>
#include <sys/ioctl.h>

// hyperion local includes
#include "LedDeviceAtmo.h"

LedDeviceAtmo::LedDeviceAtmo(const std::string& outputDevice, const unsigned baudrate) :
	LedRs232Device(outputDevice, baudrate),
	_ledBuffer(0)
{
	_ledBuffer.resize(4 + 3*5);
	_ledBuffer[0] = 0xFF; // Startbyte
	_ledBuffer[1] = 0x00; // StartChannel(Low)
	_ledBuffer[2] = 0x00; // StartChannel(High)
	_ledBuffer[3] = 0x0F; // Number of Databytes send (always! 15)
}

int LedDeviceAtmo::write(const std::vector<ColorRgb> &ledValues)
{
        // The protocol is shomehow limited. we always need to send exactly 5 channels + header
        // (19 bytes) for the hardware to recognize the data
        if (ledValues.size() != 5)
        {
                printf("AtmoLight: %d channels configured. This should always be 5!\n", ledValues.size());
                return 0;
        }

	// write data
	memcpy(4 + _ledBuffer.data(), ledValues.data(), ledValues.size() * 3);
	return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}

int LedDeviceAtmo::switchOff()
{
	memset(4 + _ledBuffer.data(), 0, _ledBuffer.size() - 4);
	return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}