branches/linux-serial/Serial.cpp

#ifdef _WINDOWS
#include "StdAfx.h"
#else //linux
#include <errno.h>
#endif

#include "Serial.h"

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

std::string writeLastError()
{
#ifdef _WINDOWS
        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
        char message[256];
        strerror_r(errno, message, 255);
        return std::string(message);
#endif
}


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

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

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

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

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

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

#ifdef _WINDOWS
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 = 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::exception(error.c_str());
        }

        mIsopen = true;
}
#endif


#ifndef _WINDOWS
void CSerial::openLinux()
{
}
#endif

void CSerial::close()
{
        if (mIsopen)
        {
#ifdef _WINDOWS
                while (getComstat().cbOutQue >0)
                        Sleep(5);
                SetCommState(mComport,&mDcbRestore);
                CloseHandle(mComport);
#else // linux close()
#endif
                mIsopen = false;
        }
}


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

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

int CSerial::outQueueSize() const
{
#ifdef _WINDOWS
        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	#ifdef _WINDOWS
2	#include "StdAfx.h"
3	#else //linux
4	#include <errno.h>
5	#endif
6
7	#include "Serial.h"
8
9	#include <stdexcept>
10	#include <string>
11	#include <sstream>
12	#include <iomanip>
13
14	std::string writeLastError()
15	{
16	#ifdef _WINDOWS
17	LPVOID lpMsgBuf;
18	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER\|FORMAT_MESSAGE_FROM_SYSTEM\|FORMAT_MESSAGE_IGNORE_INSERTS,
19	NULL,
20	GetLastError(),
21	MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),
22	(LPSTR) &lpMsgBuf,
23	0,
24	NULL);
25
26	std::ostringstream out;
27	out << "Error" << lpMsgBuf;
28	return out.str();
29	#else //linux
30	char message[256];
31	strerror_r(errno, message, 255);
32	return std::string(message);
33	#endif
34	}
35
36
37	CSerial::CSerial()
38	{
39	mIsopen = false;
40	}
41
42	CSerial::CSerial(char* port, int bitrate)
43	{
44	mPortstr = port;
45	mBitrate = bitrate;
46	mIsopen = false;
47
48	#ifdef _WINDOWS
49	openWindows();
50	#else
51	openLinux();
52	#endif
53	}
54
55	CSerial::~CSerial(void)
56	{
57	close();
58	}
59
60	void CSerial::open(char* port, int bitrate)
61	{
62	if (mIsopen)
63	throw std::runtime_error("Port already opened");
64
65	mPortstr = port;
66	mBitrate = bitrate;
67
68	#ifdef _WINDOWS
69	openWindows();
70	#else
71	openLinux();
72	#endif
73	}
74
75	#ifdef _WINDOWS
76	void CSerial::openWindows()
77	{
78	mComport = CreateFile( mPortstr, GENERIC_READ\|GENERIC_WRITE,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
79
80	if (mComport == INVALID_HANDLE_VALUE)
81	{
82	throw std::runtime_error(writeLastError().c_str());
83	}
84
85	DCB dcb;
86	dcb.DCBlength = sizeof(DCB);
87	mDcbRestore.DCBlength = sizeof(DCB);
88
89	if (!GetCommState(mComport,&dcb) \|\| !GetCommState(mComport,&mDcbRestore))
90	{
91	std::string error = writeLastError();
92	CloseHandle(mComport);
93	throw std::exception(error.c_str());
94	}
95
96	dcb.BaudRate = mBitrate;
97	dcb.ByteSize = 8;
98	dcb.Parity = NOPARITY;
99	dcb.StopBits = ONESTOPBIT;
100	dcb.fDtrControl = DTR_CONTROL_DISABLE;
101	dcb.fRtsControl = RTS_CONTROL_DISABLE;
102	dcb.fParity = false;
103	dcb.fDsrSensitivity = false;
104
105	if (!SetCommState(mComport,&dcb))
106	{
107	std::string error = writeLastError();
108	CloseHandle(mComport);
109	throw std::exception(error.c_str());
110	}
111
112	mIsopen = true;
113	}
114	#endif
115
116
117	#ifndef _WINDOWS
118	void CSerial::openLinux()
119	{
120	}
121	#endif
122
123	void CSerial::close()
124	{
125	if (mIsopen)
126	{
127	#ifdef _WINDOWS
128	while (getComstat().cbOutQue >0)
129	Sleep(5);
130	SetCommState(mComport,&mDcbRestore);
131	CloseHandle(mComport);
132	#else // linux close()
133	#endif
134	mIsopen = false;
135	}
136	}
137
138
139	unsigned char CSerial::readByte()
140	{
141	unsigned char out;
142	unsigned long size;
143
144	if (!mIsopen)
145	throw std::runtime_error("Port not opened");
146	#ifdef _WINDOWS
147	ReadFile(mComport,&out,1,&size,0);
148	if (size != 1)
149	{
150	std::string error = writeLastError();
151	CloseHandle(mComport);
152	throw std::exception(error.c_str());
153	}
154	#else //linux readByte()
155	#endif
156
157	//printByte("Read", out);
158	return out;
159	}
160
161
162	void CSerial::writeByte(unsigned char out)
163	{
164	unsigned long size;
165
166	//printByte("Write", out);
167	if (!mIsopen)
168	throw std::runtime_error("Port not opened");
169
170	#ifdef _WINDOWS
171	while (getComstat().cbOutQue >0)
172	Sleep(2);
173
174	WriteFile(mComport,&out,1,&size, NULL);
175	if (size ==0)
176	{
177	std::string error = writeLastError();
178	CloseHandle(mComport);
179	throw std::exception(error.c_str());
180	}
181	#else //linux writeByte()
182	#endif
183	}
184	#ifdef _WINDOWS
185	COMSTAT CSerial::getComstat() const
186	{
187	if (!mIsopen)
188	throw std::exception("Port not opened");
189
190	COMSTAT stat;
191	DWORD x;
192	ClearCommError(mComport,&x,&stat);
193	return stat;
194	}
195	#endif
196
197	int CSerial::bytesReady() const
198	{
199	#ifdef _WINDOWS
200	return getComstat().cbInQue;
201	#else
202	return 0;
203	#endif
204	}
205
206	int CSerial::outQueueSize() const
207	{
208	#ifdef _WINDOWS
209	return getComstat().cbOutQue;
210	#else
211	return 0;
212	#endif
213	}
214
215	/* Debug function
216	void CSerial::printByte(char* description, unsigned char byte)
217	{
218	std::cout << description << " : " << (int) byte << "/" << std::setw(2) << std::setfill('0') << std::hex << (int) byte << std::endl;
219	std::cout << std::dec;
220	}
221	*/
222
223	/*
224	void CSerial::writeBytes(UCVector out)
225	{
226	unsigned long bytesWritten;
227	unsigned int size = out.size();
228	unsigned char *buf = new unsigned char[size];
229
230	for (int i=0; i<size; i++)
231	buf[i] = out[i];
232
233	WriteFile(mComport,buf,size,&bytesWritten,NULL);
234	if (bytesWritten != size)
235	{
236	std::string error = writeLastError();
237	CloseHandle(mComport);
238	throw std::exception(error.c_str());
239	}
240	delete[] buf;
241	}
242	*/
243
244
245	/*
246	UCVector CSerial::readBytes(int maxcount)
247	{
248	UCVector buf;
249
250
251
252	return buf;
253	}
254	*/