Method readData

external/floppybridge/src/ArduinoInterface.cpp:988–1181

Reads just enough data to fulfill most extractions needed, but doesnt care about rotation position or index - pll should have the LinearExtractor configured

// Reads just enough data to fulfill most extractions needed, but doesnt care about rotation position or index - pll should have the LinearExtractor configured
DiagnosticResponse ArduinoInterface::readData(PLL::BridgePLL& pll) {
	pll.rotationExtractor()->reset(m_isHDMode);
	LinearExtractor* linearExtractor = dynamic_cast<LinearExtractor*>(pll.rotationExtractor());
	if (!linearExtractor) return DiagnosticResponse::drError;

	if (!m_tempBuffer) {
		m_tempBuffer = malloc(RAW_TRACKDATA_LENGTH_HD);
		if (!m_tempBuffer) return DiagnosticResponse::drError;
	}

	const uint32_t sizeRequired = m_isHDMode ? RAW_TRACKDATA_LENGTH_HD : RAW_TRACKDATA_LENGTH_DD;
	DiagnosticResponse response = readCurrentTrack(m_tempBuffer, sizeRequired, false);
	if (response != DiagnosticResponse::drOK) return response;
	linearExtractor->copyToBuffer(m_tempBuffer, sizeRequired);
	return response;
	
	m_lastCommand = LastCommand::lcReadTrackStream;

	if (m_version.major == 1 && m_version.minor < 8) {
		m_lastError = DiagnosticResponse::drOldFirmware;
		return m_lastError;
	}

	const bool highPrecisionMode = !m_isHDMode && m_version.deviceFlags1 & FLAGS_HIGH_PRECISION_SUPPORT;
	char mode = highPrecisionMode ? COMMAND_READTRACKSTREAM_HIGHPRECISION : COMMAND_READTRACKSTREAM;

	if (mode == COMMAND_READTRACKSTREAM_HIGHPRECISION && m_version.deviceFlags1 & FLAGS_FLUX_READ) mode = COMMAND_READTRACKSTREAM_HALFPLL;
	m_lastError = runCommand(mode);
	if (m_lastError != DiagnosticResponse::drOK) return m_lastError;
	m_isStreaming = true;

	applyCommTimeouts(true);
	unsigned char tempReadBuffer[4096] = { 0 };

	// Let the class know we're doing some streaming stuff
	m_abortStreaming = false;
	m_abortSignalled = false;

	// Number of times we failed to read anything
	int32_t readFail = 0;

	// Sliding window for abort
	char slidingWindow[5] = { 0,0,0,0,0 };
	bool timeout = false;
	bool dataState = false;
	bool isFirstByte = true;
	unsigned char mfmSequences = 0;

	MFMExtractionTarget* extractor = pll.rotationExtractor();

	for (;;) {

		// More efficient to read several bytes in one go		
		unsigned int bytesAvailable = m_comPort.getBytesWaiting();
		if (bytesAvailable < 1) bytesAvailable = 1;
		if (bytesAvailable > sizeof tempReadBuffer) bytesAvailable = sizeof tempReadBuffer;
		unsigned int bytesRead = m_comPort.read(tempReadBuffer, bytesAvailable);
		for (size_t a = 0; a < bytesRead; a++) {