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

#include "LedDeviceDMX.h"
#include <QSerialPort>
#ifndef _WIN32
#include <time.h>
#endif

LedDeviceDMX::LedDeviceDMX(const QJsonObject &deviceConfig)
	: ProviderRs232()
	, _dmxDeviceType(0)
	, _dmxStart(1)
	, _dmxSlotsPerLed(3)
	, _dmxLedCount(0)
	, _dmxChannelCount(0)
{
	_devConfig = deviceConfig;
	_deviceReady = false;
}

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

bool LedDeviceDMX::init(const QJsonObject &deviceConfig)
{
	bool isInitOK = ProviderRs232::init(deviceConfig);

	if ( isInitOK )
	{
		QString dmxString = deviceConfig["dmxdevice"].toString("invalid");
		if (dmxString == "raw")
		{
			_dmxDeviceType = 0;
			_dmxStart = 1;
			_dmxSlotsPerLed = 3;
		}
		else if (dmxString == "McCrypt")
		{
			_dmxDeviceType = 1;
			_dmxStart = 1;
			_dmxSlotsPerLed = 4;
		}
		else
		{
			//Error(_log, "unknown dmx device type %s", QSTRING_CSTR(dmxString));
			QString errortext = QString ("unknown dmx device type: %1").arg(dmxString);
			this->setInError(errortext);
			return false;
		}

		Debug(_log, "_dmxString \"%s\", _dmxDeviceType %d", QSTRING_CSTR(dmxString), _dmxDeviceType );
		_rs232Port.setStopBits(QSerialPort::TwoStop);

		_dmxLedCount  =  qMin(static_cast<int>(_ledCount), 512/_dmxSlotsPerLed);
		_dmxChannelCount  = 1 + _dmxSlotsPerLed * _dmxLedCount;

		Debug(_log, "_dmxStart %d, _dmxSlotsPerLed %d", _dmxStart, _dmxSlotsPerLed);
		Debug(_log, "_ledCount %d, _dmxLedCount %d, _dmxChannelCount %d", _ledCount, _dmxLedCount, _dmxChannelCount);

		_ledBuffer.resize(_dmxChannelCount, 0);
		_ledBuffer[0] = 0x00;	// NULL START code
	}
	return isInitOK;
}

int LedDeviceDMX::write(const std::vector<ColorRgb> &ledValues)
{
	switch (_dmxDeviceType) {
	case 0:
		memcpy(_ledBuffer.data()+1, ledValues.data(), _dmxChannelCount-1);
		break;
	case 1:
		int l =_dmxStart;
		for (int d=0; d<_dmxLedCount; d++)
		{
			_ledBuffer[l++] = ledValues[d].red;
			_ledBuffer[l++] = ledValues[d].green;
			_ledBuffer[l++] = ledValues[d].blue;
			_ledBuffer[l++] = 255;
		}
		break;
	}

	_rs232Port.setBreakEnabled(true);
// Note Windows: There is no concept of ns sleeptime, the closest possible is 1ms but requested is 0,000176ms
#ifndef _WIN32
	nanosleep((const struct timespec[]){{0, 176000L}}, NULL);	// 176 uSec break time
#endif
	_rs232Port.setBreakEnabled(false);
#ifndef _WIN32
	nanosleep((const struct timespec[]){{0, 12000L}}, NULL);	// 176 uSec make after break time
#endif

#undef uberdebug
#ifdef uberdebug
	printf ("Writing %d bytes", _dmxChannelCount);
	for (unsigned int i=0; i < _dmxChannelCount; i++)
	{
		if (i%32 == 0) {
			printf ("\n%04x: ", i);
		}
		printf ("%02x ", _ledBuffer[i]);
	}
	printf ("\n");
#endif

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