text: /***********************************************************************************************************************
  *                                                                                                                      *
  * libscopehal v0.1                                                                                                     *
  *                                                                                                                      *
  * Copyright (c) 2012-2021 Andrew D. Zonenberg and contributors                                                         *
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  ***********************************************************************************************************************/
  
  /**
  	@file
  	@author Alyssa Milburn
  	@brief Implementation of SCPIUARTTransport
   */
  
  #include "scopehal.h"
  
  using namespace std;
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  // Construction / destruction
  
  SCPIUARTTransport::SCPIUARTTransport(const string& args)
  {
  	char devfile[128];
  	unsigned int baudrate = 0;
  	if(2 != sscanf(args.c_str(), "%127[^:]:%u", devfile, &baudrate))
  	{
  		//default if port not specified
  		m_devfile = args;
  		m_baudrate = 115200;
  	}
  	else
  	{
  		m_devfile = devfile;
  		m_baudrate = baudrate;
  	}
  
  	LogDebug("Connecting to SCPI oscilloscope at %s:%d\n", m_devfile.c_str(), m_baudrate);
  
  	if(!m_uart.Connect(m_devfile, m_baudrate))
  	{
  		m_uart.Close();
  		LogError("Couldn't connect to UART\n");
  		return;
  	}
  }
  
  SCPIUARTTransport::~SCPIUARTTransport()
  {
  }
  
  bool SCPIUARTTransport::IsConnected()
  {
  	return m_uart.IsValid();
  }
  
  ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  // Actual transport code
  
  string SCPIUARTTransport::GetTransportName()
  {
  	return "uart";
  }
  
  string SCPIUARTTransport::GetConnectionString()
  {
  	char tmp[256];
  	snprintf(tmp, sizeof(tmp), "%s:%u", m_devfile.c_str(), m_baudrate);
  	return string(tmp);
  }
  
  bool SCPIUARTTransport::SendCommand(const string& cmd)
  {
  	LogTrace("Sending %s\n", cmd.c_str());
  	string tempbuf = cmd + "\n";
  	return m_uart.Write((unsigned char*)tempbuf.c_str(), tempbuf.length());
  }
  
  string SCPIUARTTransport::ReadReply(bool endOnSemicolon)
  {
  	//FIXME: there *has* to be a more efficient way to do this...
  	// (see the same code in Socket)
  	char tmp = ' ';
  	string ret;
  	while(true)
  	{
  		if(!m_uart.Read((unsigned char*)&tmp, 1))
  			break;
  		if( (tmp == '\n') || ( (tmp == ';') && endOnSemicolon ) )
  			break;
  		else
  			ret += tmp;
  	}
  	LogTrace("Got %s\n", ret.c_str());
  	return ret;
  }
  
  void SCPIUARTTransport::SendRawData(size_t len, const unsigned char* buf)
  {
  	m_uart.Write(buf, len);
  }
  
  size_t SCPIUARTTransport::ReadRawData(size_t len, unsigned char* buf)
  {
  	if(!m_uart.Read(buf, len))
  		return 0;
  	return len;
  }
  
  bool SCPIUARTTransport::IsCommandBatchingSupported()
  {
  	return true;
  }
  