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>


#ifdef DEBUG
#include <iostream>
#include <iomanip>
#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;

        mFiledescriptor = ::open(mPortstr, O_RDWR | O_NOCTTY | O_NONBLOCK);
        if (mFiledescriptor < 0)
                throw std::runtime_error( writeLastError() );

        bzero(&newtio, sizeof(newtio) ); 

        // use a std. 8N1 config
        newtio.c_cflag = convertBaudrate(mBitrate) | 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 
        
                                        
        tcflush(mFiledescriptor, TCIFLUSH);
        tcsetattr(mFiledescriptor, TCSANOW, &newtio);
        
        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) 
        {
                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)
{
#ifdef DEBUG
        std::cout << description << " : " <<  (int) byte << "/" << std::setw(2) << std::setfill('0') << std::hex << (int) byte << std::endl;
        std::cout << std::dec;
#endif
}


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