hyperion.ng/libsrc/leddevice/dev_serial/LedDeviceKarate.cpp

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

LedDeviceKarate::LedDeviceKarate(const QJsonObject &deviceConfig)
	: ProviderRs232(deviceConfig)
{
}

LedDevice* LedDeviceKarate::construct(const QJsonObject &deviceConfig)
{
	return new LedDeviceKarate(deviceConfig);
}

bool LedDeviceKarate::init(const QJsonObject &deviceConfig)
{
	bool isInitOK = false;

	// Initialise sub-class
	if ( ProviderRs232::init(deviceConfig) )
	{
		if (_ledCount != 8 && _ledCount != 16)
		{
			//Error( _log, "%d channels configured. This should always be 16!", _ledCount);
			QString errortext = QString ("%1 channels configured. This should always be 8 or 16!").arg(_ledCount);
			this->setInError(errortext);
			isInitOK = false;
		}
		else
		{
			_ledBuffer.resize(4 + _ledCount * 3); // 4-byte header, 3 RGB values
			_ledBuffer[0] = 0xAA;				  // Startbyte
			_ledBuffer[1] = 0x12;				  // Send all Channels in Batch
			_ledBuffer[2] = 0x00;				  // Checksum
			_ledBuffer[3] = _ledCount * 3;        // Number of Databytes send

			Debug( _log, "Karatelight header for %d leds: 0x%02x 0x%02x 0x%02x 0x%02x", _ledCount,
				  _ledBuffer[0], _ledBuffer[1], _ledBuffer[2], _ledBuffer[3] );

			isInitOK = true;
		}
	}
	return isInitOK;
}

int LedDeviceKarate::write(const std::vector<ColorRgb> &ledValues)
{
	for (signed iLed=0; iLed< static_cast<int>(_ledCount); iLed++)
        {
       		const ColorRgb& rgb = ledValues[iLed];
                _ledBuffer[iLed*3+4] = rgb.green;
                _ledBuffer[iLed*3+5] = rgb.blue;
                _ledBuffer[iLed*3+6] = rgb.red;
        }

	// Calc Checksum
	_ledBuffer[2] =  _ledBuffer[0] ^ _ledBuffer[1];
    	for (unsigned int i = 3; i < _ledBuffer.size(); i++)
      		_ledBuffer[2] ^= _ledBuffer[i];

	return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}