added missing hardy rules and source version
[deb_libcec.git] / src / lib / platform / windows / serialport.cpp
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1/*
2 * This file is part of the libCEC(R) library.
3 *
b492c10e 4 * libCEC(R) is Copyright (C) 2011-2012 Pulse-Eight Limited. All rights reserved.
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5 * libCEC(R) is an original work, containing original code.
6 *
7 * libCEC(R) is a trademark of Pulse-Eight Limited.
8 *
9 * This program is dual-licensed; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 *
23 *
24 * Alternatively, you can license this library under a commercial license,
25 * please contact Pulse-Eight Licensing for more information.
26 *
27 * For more information contact:
28 * Pulse-Eight Licensing <license@pulse-eight.com>
29 * http://www.pulse-eight.com/
30 * http://www.pulse-eight.net/
31 */
32
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33#include "../sockets/serialport.h"
34#include "../util/baudrate.h"
35#include "../util/timeutils.h"
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36
37using namespace std;
f00ff009 38using namespace PLATFORM;
abbca718 39
99666519 40void FormatWindowsError(int iErrorCode, CStdString &strMessage)
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41{
42 if (iErrorCode != ERROR_SUCCESS)
43 {
44 char strAddMessage[1024];
45 FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, iErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), strAddMessage, 1024, NULL);
46 strMessage.append(": ");
47 strMessage.append(strAddMessage);
48 }
49}
50
251eb3e8 51bool CSerialSocket::SetTimeouts(serial_socket_t socket, int* iError, DWORD iTimeoutMs)
abbca718 52{
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53 if (socket == INVALID_HANDLE_VALUE)
54 return false;
55
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56 if (iTimeoutMs == m_iCurrentReadTimeout)
57 return true;
99666519 58
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59 COMMTIMEOUTS cto;
60 if (iTimeoutMs == 0)
15678787 61 {
251eb3e8 62 cto.ReadIntervalTimeout = MAXDWORD;
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63 cto.ReadTotalTimeoutConstant = 0;
64 cto.ReadTotalTimeoutMultiplier = 0;
65 }
66 else
67 {
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68 cto.ReadIntervalTimeout = 0;
69 cto.ReadTotalTimeoutConstant = iTimeoutMs;
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70 cto.ReadTotalTimeoutMultiplier = 0;
71 }
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72
73 if (!SetCommTimeouts(socket, &cto))
74 {
75 *iError = GetLastError();
76 return false;
77 }
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78 else
79 {
80 m_iCurrentReadTimeout = iTimeoutMs;
81 }
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82
83 return true;
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84}
85
99666519 86void CSerialSocket::Close(void)
abbca718 87{
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88 if (IsOpen())
89 SerialSocketClose(m_socket);
4da0e7f1 90 m_socket = INVALID_SERIAL_SOCKET_VALUE;
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91}
92
93void CSerialSocket::Shutdown(void)
94{
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95 if (IsOpen())
96 SerialSocketClose(m_socket);
4da0e7f1 97 m_socket = INVALID_SERIAL_SOCKET_VALUE;
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98}
99
100ssize_t CSerialSocket::Write(void* data, size_t len)
101{
48c1be3c 102 return IsOpen() ? SerialSocketWrite(m_socket, &m_iError, data, len) : -1;
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103}
104
105ssize_t CSerialSocket::Read(void* data, size_t len, uint64_t iTimeoutMs /* = 0 */)
106{
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107 DWORD dwTimeoutMs((DWORD)iTimeoutMs);
108 if (iTimeoutMs != (uint64_t)iTimeoutMs)
109 dwTimeoutMs = MAXDWORD;
110
111 return IsOpen() && SetTimeouts(m_socket, &m_iError, dwTimeoutMs) ?
112 SerialSocketRead(m_socket, &m_iError, data, len, iTimeoutMs) :
113 -1;
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114}
115
116bool CSerialSocket::Open(uint64_t iTimeoutMs /* = 0 */)
117{
118 iTimeoutMs = 0;
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119 if (IsOpen())
120 return false;
121
99666519 122 CStdString strComPath = "\\\\.\\" + m_strName;
f00ff009 123 CLockObject lock(m_mutex);
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124 m_socket = CreateFile(strComPath.c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
125 if (m_socket == INVALID_HANDLE_VALUE)
abbca718 126 {
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127 m_strError = "Unable to open COM port";
128 FormatWindowsError(GetLastError(), m_strError);
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129 return false;
130 }
131
132 COMMCONFIG commConfig = {0};
133 DWORD dwSize = sizeof(commConfig);
134 commConfig.dwSize = dwSize;
ff50391c 135 if (GetDefaultCommConfig(strComPath.c_str(), &commConfig,&dwSize))
abbca718 136 {
99666519 137 if (!SetCommConfig(m_socket, &commConfig,dwSize))
abbca718 138 {
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139 m_strError = "unable to set default config";
140 FormatWindowsError(GetLastError(), m_strError);
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141 }
142 }
143 else
144 {
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145 m_strError = "unable to get default config";
146 FormatWindowsError(GetLastError(), m_strError);
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147 }
148
99666519 149 if (!SetupComm(m_socket, 64, 64))
abbca718 150 {
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151 m_strError = "unable to set up the com port";
152 FormatWindowsError(GetLastError(), m_strError);
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153 }
154
99666519 155 if (!SetBaudRate(m_iBaudrate))
abbca718 156 {
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157 m_strError = "unable to set baud rate";
158 FormatWindowsError(GetLastError(), m_strError);
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159 Close();
160 return false;
161 }
162
251eb3e8 163 if (!SetTimeouts(m_socket, &m_iError, 0))
abbca718 164 {
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165 m_strError = "unable to set timeouts";
166 FormatWindowsError(GetLastError(), m_strError);
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167 Close();
168 return false;
169 }
170
171 m_bIsOpen = true;
172 return m_bIsOpen;
173}
174
99666519 175bool CSerialSocket::SetBaudRate(uint32_t baudrate)
abbca718 176{
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177 int32_t rate = IntToBaudrate(baudrate);
178 if (rate < 0)
179 m_iBaudrate = baudrate > 0 ? baudrate : 0;
180 else
181 m_iBaudrate = rate;
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182
183 DCB dcb;
184 memset(&dcb,0,sizeof(dcb));
185 dcb.DCBlength = sizeof(dcb);
b9187cc6 186 dcb.BaudRate = IntToBaudrate(m_iBaudrate);
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187 dcb.fBinary = true;
188 dcb.fDtrControl = DTR_CONTROL_DISABLE;
189 dcb.fRtsControl = RTS_CONTROL_DISABLE;
190 dcb.fOutxCtsFlow = false;
191 dcb.fOutxDsrFlow = false;
192 dcb.fOutX = false;
193 dcb.fInX = false;
194 dcb.fAbortOnError = true;
195
99666519 196 if (m_iParity == SERIAL_PARITY_NONE)
abbca718 197 dcb.Parity = NOPARITY;
99666519 198 else if (m_iParity == SERIAL_PARITY_EVEN)
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199 dcb.Parity = EVENPARITY;
200 else
201 dcb.Parity = ODDPARITY;
202
99666519 203 if (m_iStopbits == SERIAL_STOP_BITS_TWO)
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204 dcb.StopBits = TWOSTOPBITS;
205 else
206 dcb.StopBits = ONESTOPBIT;
207
99666519 208 dcb.ByteSize = (BYTE)m_iDatabits;
abbca718 209
99666519 210 if(!SetCommState(m_socket,&dcb))
abbca718 211 {
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212 m_strError = "SetCommState failed";
213 FormatWindowsError(GetLastError(), m_strError);
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214 return false;
215 }
216
217 return true;
218}