branches/linux-serial/Serial.cpp

#ifndef _MSC_VER //linux
#include <sys/types.h>
#include <sys/stat.h>

#include <unistd.h>
#include <errno.h>
#include <termios.h>
#include <fcntl.h>
#endif

#include "stdafx.h"
#include "Serial.h"

#include <stdexcept>
#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>

#define _POSIX_SOURCE 1 /* POSIX compliant source */
#define BAUDRATE B9600

#ifndef _MSC_VER // ugly hack, else will gcc not accept this constant in openLinux()
const int flags = O_RDWR | O_NOCTTY | O_NONBLOCK;
#endif

std::string writeLastError()
{
#ifdef _MSC_VER
        LPVOID lpMsgBuf;
        FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
                        NULL,
                        GetLastError(),
                        MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),
                        (LPSTR) &lpMsgBuf,
                        0,
                        NULL);

        std::ostringstream out;
        out << "Error" << lpMsgBuf;
        return out.str();
#else //linux
        return std::string( strerror(errno) );
#endif
}


CSerial::CSerial()
{
        mIsopen = false;
}


CSerial::CSerial(char* port, Baudrate bitrate)
{
        mPortstr = port;
        mBitrate = bitrate;
        mIsopen = false;

#ifdef _MSC_VER
        openWindows();
#else
        openLinux();
#endif
}

CSerial::~CSerial(void)
{
        close();
}

void CSerial::open(char* port, Baudrate bitrate)
{
        if (mIsopen)
                throw std::runtime_error("Port already opened");

        mPortstr = port;
        mBitrate = bitrate;
        
#ifdef _MSC_VER
        openWindows();
#else
        openLinux();
#endif
}

#ifdef _MSC_VER
void CSerial::openWindows()
{
        mComport = CreateFile( mPortstr, GENERIC_READ|GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);

        if (mComport == INVALID_HANDLE_VALUE)
        {
                throw std::runtime_error(writeLastError().c_str());
        }

        DCB dcb;
        dcb.DCBlength = sizeof(DCB);
        mDcbRestore.DCBlength = sizeof(DCB);

        if (!GetCommState(mComport,&dcb) || !GetCommState(mComport,&mDcbRestore))
        {
                std::string error = writeLastError();
                CloseHandle(mComport);
                throw std::exception(error.c_str());
        }

        dcb.BaudRate = convertBaudrate(mBitrate);
        dcb.ByteSize = 8;
        dcb.Parity = NOPARITY;
        dcb.StopBits = ONESTOPBIT;
        dcb.fDtrControl = DTR_CONTROL_DISABLE;
        dcb.fRtsControl = RTS_CONTROL_DISABLE;
        dcb.fParity = false;
        dcb.fDsrSensitivity = false;

        if (!SetCommState(mComport,&dcb))
        {
                std::string error = writeLastError();
                CloseHandle(mComport);
                throw std::runtime_error( error );
        }

        mIsopen = true;
}
#endif


#ifndef _MSC_VER
void CSerial::openLinux()
{
        termios newtio;

        std::cout << "opening port " << std::endl;      
        mFiledescriptor = ::open(mPortstr, flags);
        if (mFiledescriptor < 0)
                throw std::runtime_error( writeLastError() );

        std::cout << "port opened" << std::endl;
        bzero(&newtio, sizeof(newtio) ); 

        // use a std. 8N1 config
        newtio.c_cflag = convertBaudrate(mBitrate) | CRTSCTS | CS8 | CLOCAL | CREAD;
        newtio.c_iflag = IGNPAR;
        newtio.c_oflag = 0;

        // set input mode (non-canonical, no echo,...) 
        newtio.c_lflag = 0;
                         
        newtio.c_cc[VTIME]    = 0;   // inter-character timer unused 
        newtio.c_cc[VMIN]     = 0;   // blocking read until 1 chars received 
        

/*      cfmakeraw(&newtio);
        cfsetospeed(&newtio, B9600 );
        cfsetispeed(&newtio, B9600 );
*/      
                                        
        tcflush(mFiledescriptor, TCIFLUSH);
        tcsetattr(mFiledescriptor, TCSANOW, &newtio);
        
        std::cout << "port configured " << std::endl;
        mIsopen = true;
}
#endif

void CSerial::close()
{
        if (mIsopen)
        {
#ifdef _MSC_VER
                while (getComstat().cbOutQue >0)
                        Sleep(5);
                SetCommState(mComport,&mDcbRestore);
                CloseHandle(mComport);
#else // linux close()
                tcdrain(mFiledescriptor);
                tcsetattr(mFiledescriptor, TCSADRAIN, &mOldtio); //restore settings, when all data is written
                ::close(mFiledescriptor); //close()== system-call
#endif
                mIsopen = false;
        }
}


int CSerial::readByte()
{
        unsigned char out;
        unsigned long size;

        if (!mIsopen)
                throw std::runtime_error("Port not opened");
#ifdef _MSC_VER
        ReadFile(mComport,&out,1,&size,0);
        if (size != 1)
        {
                std::string error = writeLastError();
                CloseHandle(mComport);
                throw std::exception(error.c_str());
        }
#else //linux readByte()
        size = read(mFiledescriptor, &out, 1);
        if (size != 1) 
        {
                //std::cout << writeLastError() << std::endl;
                return -1;
        }
#endif

        printByte("Read", out);
        return out;
}


void CSerial::writeByte(unsigned char out)
{
        unsigned long size;

        printByte("Write", out);
        if (!mIsopen)
                throw std::runtime_error("Port not opened");

#ifdef _MSC_VER
        while (getComstat().cbOutQue >0)
                Sleep(2);

        WriteFile(mComport,&out,1,&size, NULL);
        if (size ==0)
        {
                std::string error = writeLastError();
                CloseHandle(mComport);
                throw std::exception(error.c_str());
        }
#else //linux writeByte()
        //tcdrain(mFiledescriptor);
        size = write(mFiledescriptor,&out,1);
        Sleep(50);
        //tcdrain(mFiledescriptor);
        if (size != 1)
                throw std::runtime_error(writeLastError() );
#endif
}

int CSerial::convertBaudrate(Baudrate rate)
{
        int retval=0;
#ifdef _MSC_VER
        switch( rate )
        {
                case Baud300:
                        retval = 300;
                        break;
                case Baud600:
                        retval = 600;
                        break;
                case Baud1200:
                        retval = 1200;
                        break;
                case Baud2400:
                        retval = 2400;
                        break;
                case Baud4800:
                        retval = 4800;
                        break;
                case Baud9600:
                        retval = 9600;
                        break;
                case Baud19200:
                        retval = 19200;
                        break;
                case Baud38400:
                        retval = 38400;
                        break;
                case Baud57600:
                        retval = 57600;
                        break;
                case Baud115200:
                        retval = 115200;
                        break;                  
        }
#else
        switch (rate)
        {
                case Baud300:
                        retval = B300;
                        break;
                case Baud600:
                        retval = B600;
                        break;
                case Baud1200:
                        retval = B1200;
                        break;
                case Baud2400:
                        retval = B2400;
                        break;
                case Baud4800:
                        retval = B4800;
                        break;
                case Baud9600:
                        retval = B9600;
                        break;
                case Baud19200:
                        retval = B19200;
                        break;
                case Baud38400:
                        retval = B38400;
                        break;
                case Baud57600:
                        retval = B57600;
                        break;
                case Baud115200:
                        retval = B115200;
                        break;
        }
#endif

        return retval;
}

#ifdef _MSC_VER
COMSTAT CSerial::getComstat() const
{
        if (!mIsopen)
                throw std::exception("Port not opened");

        COMSTAT stat;
        DWORD x;
        ClearCommError(mComport,&x,&stat);
        return stat;
}
#endif

int CSerial::bytesReady() const
{
#ifdef _MSC_VER
        return getComstat().cbInQue;
#else
        return 0;
#endif
}

int CSerial::outQueueSize() const
{
#ifdef _MSC_VER
        return getComstat().cbOutQue;
#else
        return 0;
#endif
}

// Debug function
//
void CSerial::printByte(char* description, unsigned char byte)
{
        std::cout << description << " : " <<  (int) byte << "/" << std::setw(2) << std::setfill('0') << std::hex << (int) byte << std::endl;
        std::cout << std::dec;
}


/*
void CSerial::writeBytes(UCVector out)
{
        unsigned long bytesWritten;
        unsigned int size = out.size();
        unsigned char *buf = new unsigned char[size];

        for (int i=0; i<size; i++)
                buf[i] = out[i];

        WriteFile(mComport,buf,size,&bytesWritten,NULL);
        if (bytesWritten != size)
        {
                std::string error = writeLastError();
                CloseHandle(mComport);
                throw std::exception(error.c_str());
        }
        delete[] buf;
}
*/


/*
UCVector CSerial::readBytes(int maxcount)
{
        UCVector buf;


        return buf;
}
*/
1	torben	49	#ifndef _MSC_VER //linux
2	torben	46	#include <sys/types.h>
3			#include <sys/stat.h>
4
5			#include <unistd.h>
6	torben	44	#include <errno.h>
7	torben	46	#include <termios.h>
8			#include <fcntl.h>
9	torben	44	#endif
10	torben	38
11	torben	51	#include "stdafx.h"
12	torben	38	#include "Serial.h"
13
14	torben	44	#include <stdexcept>
15	torben	38	#include <string>
16			#include <sstream>
17	torben	46	#include <iostream>
18	torben	38	#include <iomanip>
19
20	torben	46	#define _POSIX_SOURCE 1 /* POSIX compliant source */
21	torben	47	#define BAUDRATE B9600
22	torben	46
23	torben	49	#ifndef _MSC_VER // ugly hack, else will gcc not accept this constant in openLinux()
24	torben	50	const int flags = O_RDWR \| O_NOCTTY \| O_NONBLOCK;
25	torben	46	#endif
26
27	torben	38	std::string writeLastError()
28			{
29	torben	49	#ifdef _MSC_VER
30	torben	38	LPVOID lpMsgBuf;
31			FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER\|FORMAT_MESSAGE_FROM_SYSTEM\|FORMAT_MESSAGE_IGNORE_INSERTS,
32			NULL,
33			GetLastError(),
34			MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),
35			(LPSTR) &lpMsgBuf,
36			0,
37			NULL);
38
39			std::ostringstream out;
40			out << "Error" << lpMsgBuf;
41			return out.str();
42	torben	44	#else //linux
43	torben	46	return std::string( strerror(errno) );
44	torben	44	#endif
45	torben	38	}
46
47
48			CSerial::CSerial()
49			{
50			mIsopen = false;
51			}
52
53	torben	54
54			CSerial::CSerial(char* port, Baudrate bitrate)
55	torben	38	{
56			mPortstr = port;
57			mBitrate = bitrate;
58			mIsopen = false;
59
60	torben	49	#ifdef _MSC_VER
61	torben	44	openWindows();
62			#else
63			openLinux();
64			#endif
65	torben	38	}
66
67			CSerial::~CSerial(void)
68			{
69			close();
70			}
71
72	torben	54	void CSerial::open(char* port, Baudrate bitrate)
73	torben	38	{
74			if (mIsopen)
75	torben	44	throw std::runtime_error("Port already opened");
76	torben	38
77			mPortstr = port;
78			mBitrate = bitrate;
79	torben	44
80	torben	49	#ifdef _MSC_VER
81	torben	44	openWindows();
82			#else
83			openLinux();
84			#endif
85	torben	38	}
86
87	torben	49	#ifdef _MSC_VER
88	torben	44	void CSerial::openWindows()
89	torben	38	{
90			mComport = CreateFile( mPortstr, GENERIC_READ\|GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
91
92			if (mComport == INVALID_HANDLE_VALUE)
93			{
94	torben	44	throw std::runtime_error(writeLastError().c_str());
95	torben	38	}
96
97			DCB dcb;
98			dcb.DCBlength = sizeof(DCB);
99			mDcbRestore.DCBlength = sizeof(DCB);
100
101			if (!GetCommState(mComport,&dcb) \|\| !GetCommState(mComport,&mDcbRestore))
102			{
103			std::string error = writeLastError();
104			CloseHandle(mComport);
105			throw std::exception(error.c_str());
106			}
107
108	torben	54	dcb.BaudRate = convertBaudrate(mBitrate);
109	torben	38	dcb.ByteSize = 8;
110			dcb.Parity = NOPARITY;
111			dcb.StopBits = ONESTOPBIT;
112			dcb.fDtrControl = DTR_CONTROL_DISABLE;
113			dcb.fRtsControl = RTS_CONTROL_DISABLE;
114			dcb.fParity = false;
115			dcb.fDsrSensitivity = false;
116
117			if (!SetCommState(mComport,&dcb))
118			{
119			std::string error = writeLastError();
120			CloseHandle(mComport);
121	torben	49	throw std::runtime_error( error );
122	torben	38	}
123
124			mIsopen = true;
125			}
126	torben	44	#endif
127	torben	38
128	torben	44
129	torben	49	#ifndef _MSC_VER
130	torben	44	void CSerial::openLinux()
131			{
132	torben	46	termios newtio;
133
134			std::cout << "opening port " << std::endl;
135			mFiledescriptor = ::open(mPortstr, flags);
136			if (mFiledescriptor < 0)
137			throw std::runtime_error( writeLastError() );
138
139			std::cout << "port opened" << std::endl;
140			bzero(&newtio, sizeof(newtio) );
141
142			// use a std. 8N1 config
143	torben	54	newtio.c_cflag = convertBaudrate(mBitrate) \| CRTSCTS \| CS8 \| CLOCAL \| CREAD;
144	torben	46	newtio.c_iflag = IGNPAR;
145			newtio.c_oflag = 0;
146
147	torben	54	// set input mode (non-canonical, no echo,...)
148	torben	46	newtio.c_lflag = 0;
149
150	torben	54	newtio.c_cc[VTIME] = 0; // inter-character timer unused
151			newtio.c_cc[VMIN] = 0; // blocking read until 1 chars received
152
153	torben	47
154	torben	54	/* cfmakeraw(&newtio);
155			cfsetospeed(&newtio, B9600 );
156			cfsetispeed(&newtio, B9600 );
157			*/
158	torben	46
159			tcflush(mFiledescriptor, TCIFLUSH);
160			tcsetattr(mFiledescriptor, TCSANOW, &newtio);
161
162			std::cout << "port configured " << std::endl;
163			mIsopen = true;
164	torben	44	}
165			#endif
166
167	torben	38	void CSerial::close()
168			{
169			if (mIsopen)
170			{
171	torben	49	#ifdef _MSC_VER
172	torben	38	while (getComstat().cbOutQue >0)
173			Sleep(5);
174			SetCommState(mComport,&mDcbRestore);
175			CloseHandle(mComport);
176	torben	44	#else // linux close()
177	torben	46	tcdrain(mFiledescriptor);
178			tcsetattr(mFiledescriptor, TCSADRAIN, &mOldtio); //restore settings, when all data is written
179			::close(mFiledescriptor); //close()== system-call
180	torben	44	#endif
181	torben	38	mIsopen = false;
182			}
183			}
184
185
186	torben	47	int CSerial::readByte()
187	torben	38	{
188			unsigned char out;
189			unsigned long size;
190
191			if (!mIsopen)
192	torben	44	throw std::runtime_error("Port not opened");
193	torben	49	#ifdef _MSC_VER
194	torben	38	ReadFile(mComport,&out,1,&size,0);
195			if (size != 1)
196			{
197			std::string error = writeLastError();
198			CloseHandle(mComport);
199			throw std::exception(error.c_str());
200			}
201	torben	44	#else //linux readByte()
202	torben	46	size = read(mFiledescriptor, &out, 1);
203	torben	47	if (size != 1)
204			{
205	torben	54	//std::cout << writeLastError() << std::endl;
206	torben	47	return -1;
207			}
208	torben	44	#endif
209	torben	38
210	torben	46	printByte("Read", out);
211	torben	38	return out;
212			}
213
214
215			void CSerial::writeByte(unsigned char out)
216			{
217			unsigned long size;
218
219	torben	47	printByte("Write", out);
220	torben	38	if (!mIsopen)
221	torben	44	throw std::runtime_error("Port not opened");
222	torben	38
223	torben	49	#ifdef _MSC_VER
224	torben	38	while (getComstat().cbOutQue >0)
225			Sleep(2);
226
227			WriteFile(mComport,&out,1,&size, NULL);
228			if (size ==0)
229			{
230			std::string error = writeLastError();
231			CloseHandle(mComport);
232			throw std::exception(error.c_str());
233			}
234	torben	44	#else //linux writeByte()
235	torben	47	//tcdrain(mFiledescriptor);
236	torben	46	size = write(mFiledescriptor,&out,1);
237	torben	47	Sleep(50);
238			//tcdrain(mFiledescriptor);
239	torben	46	if (size != 1)
240			throw std::runtime_error(writeLastError() );
241	torben	44	#endif
242	torben	38	}
243	torben	46
244	torben	54	int CSerial::convertBaudrate(Baudrate rate)
245			{
246			int retval=0;
247	torben	49	#ifdef _MSC_VER
248	torben	54	switch( rate )
249			{
250			case Baud300:
251			retval = 300;
252			break;
253			case Baud600:
254			retval = 600;
255			break;
256			case Baud1200:
257			retval = 1200;
258			break;
259			case Baud2400:
260			retval = 2400;
261			break;
262			case Baud4800:
263			retval = 4800;
264			break;
265			case Baud9600:
266			retval = 9600;
267			break;
268			case Baud19200:
269			retval = 19200;
270			break;
271			case Baud38400:
272			retval = 38400;
273			break;
274			case Baud57600:
275			retval = 57600;
276			break;
277	torben	55	case Baud115200:
278	torben	54	retval = 115200;
279			break;
280			}
281			#else
282			switch (rate)
283			{
284			case Baud300:
285			retval = B300;
286			break;
287			case Baud600:
288			retval = B600;
289			break;
290			case Baud1200:
291			retval = B1200;
292			break;
293			case Baud2400:
294			retval = B2400;
295			break;
296			case Baud4800:
297			retval = B4800;
298			break;
299			case Baud9600:
300			retval = B9600;
301			break;
302			case Baud19200:
303			retval = B19200;
304			break;
305			case Baud38400:
306			retval = B38400;
307			break;
308			case Baud57600:
309			retval = B57600;
310			break;
311			case Baud115200:
312			retval = B115200;
313			break;
314			}
315			#endif
316
317			return retval;
318			}
319
320			#ifdef _MSC_VER
321	torben	38	COMSTAT CSerial::getComstat() const
322			{
323			if (!mIsopen)
324			throw std::exception("Port not opened");
325
326			COMSTAT stat;
327			DWORD x;
328			ClearCommError(mComport,&x,&stat);
329			return stat;
330			}
331	torben	44	#endif
332	torben	38
333			int CSerial::bytesReady() const
334			{
335	torben	49	#ifdef _MSC_VER
336	torben	38	return getComstat().cbInQue;
337	torben	44	#else
338			return 0;
339			#endif
340	torben	38	}
341
342			int CSerial::outQueueSize() const
343			{
344	torben	49	#ifdef _MSC_VER
345	torben	38	return getComstat().cbOutQue;
346	torben	44	#else
347			return 0;
348			#endif
349	torben	38	}
350
351	torben	46	// Debug function
352			//
353	torben	38	void CSerial::printByte(char* description, unsigned char byte)
354			{
355			std::cout << description << " : " << (int) byte << "/" << std::setw(2) << std::setfill('0') << std::hex << (int) byte << std::endl;
356			std::cout << std::dec;
357			}
358
359	torben	46
360	torben	38	/*
361			void CSerial::writeBytes(UCVector out)
362			{
363			unsigned long bytesWritten;
364			unsigned int size = out.size();
365			unsigned char *buf = new unsigned char[size];
366
367			for (int i=0; i<size; i++)
368			buf[i] = out[i];
369
370			WriteFile(mComport,buf,size,&bytesWritten,NULL);
371			if (bytesWritten != size)
372			{
373			std::string error = writeLastError();
374			CloseHandle(mComport);
375			throw std::exception(error.c_str());
376			}
377			delete[] buf;
378			}
379			*/
380
381
382			/*
383			UCVector CSerial::readBytes(int maxcount)
384			{
385			UCVector buf;
386
387
388
389			return buf;
390			}
391			*/