Commit | Line | Data |
---|---|---|
cbbe90dd JB |
1 | /* |
2 | * This file is part of the libCEC(R) library. | |
3 | * | |
4 | * libCEC(R) is Copyright (C) 2011-2013 Pulse-Eight Limited. All rights reserved. | |
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 | ||
33 | #include "env.h" | |
34 | #include "lib/platform/sockets/serialport.h" | |
35 | #include "lib/platform/util/baudrate.h" | |
36 | #include "lib/platform/util/timeutils.h" | |
37 | ||
38 | using namespace std; | |
39 | using namespace PLATFORM; | |
40 | ||
41 | void FormatWindowsError(int iErrorCode, std::string &strMessage) | |
42 | { | |
43 | if (iErrorCode != ERROR_SUCCESS) | |
44 | { | |
45 | char strAddMessage[1024]; | |
46 | FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, iErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), strAddMessage, 1024, NULL); | |
47 | strMessage.append(": "); | |
48 | strMessage.append(strAddMessage); | |
49 | } | |
50 | } | |
51 | ||
52 | bool CSerialSocket::SetTimeouts(serial_socket_t socket, int* iError, DWORD iTimeoutMs) | |
53 | { | |
54 | if (socket == INVALID_HANDLE_VALUE) | |
55 | return false; | |
56 | ||
57 | if (iTimeoutMs == m_iCurrentReadTimeout) | |
58 | return true; | |
59 | ||
60 | COMMTIMEOUTS cto; | |
61 | if (iTimeoutMs == 0) | |
62 | { | |
63 | cto.ReadIntervalTimeout = MAXDWORD; | |
64 | cto.ReadTotalTimeoutConstant = 0; | |
65 | cto.ReadTotalTimeoutMultiplier = 0; | |
66 | } | |
67 | else | |
68 | { | |
69 | cto.ReadIntervalTimeout = 0; | |
70 | cto.ReadTotalTimeoutConstant = iTimeoutMs; | |
71 | cto.ReadTotalTimeoutMultiplier = 0; | |
72 | } | |
73 | ||
74 | if (!SetCommTimeouts(socket, &cto)) | |
75 | { | |
76 | *iError = GetLastError(); | |
77 | return false; | |
78 | } | |
79 | else | |
80 | { | |
81 | m_iCurrentReadTimeout = iTimeoutMs; | |
82 | } | |
83 | ||
84 | return true; | |
85 | } | |
86 | ||
87 | void CSerialSocket::Close(void) | |
88 | { | |
89 | if (IsOpen()) | |
90 | SerialSocketClose(m_socket); | |
91 | m_socket = INVALID_SERIAL_SOCKET_VALUE; | |
92 | } | |
93 | ||
94 | void CSerialSocket::Shutdown(void) | |
95 | { | |
96 | if (IsOpen()) | |
97 | SerialSocketClose(m_socket); | |
98 | m_socket = INVALID_SERIAL_SOCKET_VALUE; | |
99 | } | |
100 | ||
101 | ssize_t CSerialSocket::Write(void* data, size_t len) | |
102 | { | |
103 | if (IsOpen()) | |
104 | { | |
105 | ssize_t iReturn = SerialSocketWrite(m_socket, &m_iError, data, len); | |
106 | if (iReturn != (ssize_t)len) | |
107 | { | |
108 | m_strError = "unable to write to the serial port"; | |
109 | FormatWindowsError(GetLastError(), m_strError); | |
110 | } | |
111 | return iReturn; | |
112 | } | |
113 | return -1; | |
114 | } | |
115 | ||
116 | ssize_t CSerialSocket::Read(void* data, size_t len, uint64_t iTimeoutMs /* = 0 */) | |
117 | { | |
118 | DWORD dwTimeoutMs((DWORD)iTimeoutMs); | |
119 | if (iTimeoutMs != (uint64_t)iTimeoutMs) | |
120 | dwTimeoutMs = MAXDWORD; | |
121 | ||
122 | return IsOpen() && SetTimeouts(m_socket, &m_iError, dwTimeoutMs) ? | |
123 | SerialSocketRead(m_socket, &m_iError, data, len, iTimeoutMs) : | |
124 | -1; | |
125 | } | |
126 | ||
127 | bool CSerialSocket::Open(uint64_t iTimeoutMs /* = 0 */) | |
128 | { | |
129 | iTimeoutMs = 0; | |
130 | if (IsOpen()) | |
131 | return false; | |
132 | ||
133 | std::string strComPath = "\\\\.\\" + m_strName; | |
134 | CLockObject lock(m_mutex); | |
135 | m_socket = CreateFile(strComPath.c_str(), GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
136 | if (m_socket == INVALID_HANDLE_VALUE) | |
137 | { | |
138 | m_strError = "Unable to open COM port"; | |
139 | FormatWindowsError(GetLastError(), m_strError); | |
140 | return false; | |
141 | } | |
142 | ||
143 | COMMCONFIG commConfig = {0}; | |
144 | DWORD dwSize = sizeof(commConfig); | |
145 | commConfig.dwSize = dwSize; | |
146 | if (GetDefaultCommConfig(strComPath.c_str(), &commConfig,&dwSize)) | |
147 | { | |
148 | if (!SetCommConfig(m_socket, &commConfig,dwSize)) | |
149 | { | |
150 | m_strError = "unable to set default config"; | |
151 | FormatWindowsError(GetLastError(), m_strError); | |
152 | } | |
153 | } | |
154 | else | |
155 | { | |
156 | m_strError = "unable to get default config"; | |
157 | FormatWindowsError(GetLastError(), m_strError); | |
158 | } | |
159 | ||
160 | if (!SetupComm(m_socket, 64, 64)) | |
161 | { | |
162 | m_strError = "unable to set up the com port"; | |
163 | FormatWindowsError(GetLastError(), m_strError); | |
164 | } | |
165 | ||
166 | if (!SetBaudRate(m_iBaudrate)) | |
167 | { | |
168 | m_strError = "unable to set baud rate"; | |
169 | FormatWindowsError(GetLastError(), m_strError); | |
170 | Close(); | |
171 | return false; | |
172 | } | |
173 | ||
174 | if (!SetTimeouts(m_socket, &m_iError, 0)) | |
175 | { | |
176 | m_strError = "unable to set timeouts"; | |
177 | FormatWindowsError(GetLastError(), m_strError); | |
178 | Close(); | |
179 | return false; | |
180 | } | |
181 | ||
182 | m_strError.clear(); | |
183 | m_bIsOpen = true; | |
184 | return m_bIsOpen; | |
185 | } | |
186 | ||
187 | bool CSerialSocket::SetBaudRate(uint32_t baudrate) | |
188 | { | |
189 | int32_t rate = IntToBaudrate(baudrate); | |
190 | if (rate < 0) | |
191 | m_iBaudrate = baudrate > 0 ? baudrate : 0; | |
192 | else | |
193 | m_iBaudrate = rate; | |
194 | ||
195 | DCB dcb; | |
196 | memset(&dcb,0,sizeof(dcb)); | |
197 | dcb.DCBlength = sizeof(dcb); | |
198 | dcb.BaudRate = IntToBaudrate(m_iBaudrate); | |
199 | dcb.fBinary = true; | |
200 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
201 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
202 | dcb.fOutxCtsFlow = false; | |
203 | dcb.fOutxDsrFlow = false; | |
204 | dcb.fOutX = false; | |
205 | dcb.fInX = false; | |
206 | dcb.fAbortOnError = true; | |
207 | ||
208 | if (m_iParity == SERIAL_PARITY_NONE) | |
209 | dcb.Parity = NOPARITY; | |
210 | else if (m_iParity == SERIAL_PARITY_EVEN) | |
211 | dcb.Parity = EVENPARITY; | |
212 | else | |
213 | dcb.Parity = ODDPARITY; | |
214 | ||
215 | if (m_iStopbits == SERIAL_STOP_BITS_TWO) | |
216 | dcb.StopBits = TWOSTOPBITS; | |
217 | else | |
218 | dcb.StopBits = ONESTOPBIT; | |
219 | ||
220 | dcb.ByteSize = (BYTE)m_iDatabits; | |
221 | ||
222 | if(!SetCommState(m_socket,&dcb)) | |
223 | { | |
224 | m_strError = "SetCommState failed"; | |
225 | FormatWindowsError(GetLastError(), m_strError); | |
226 | return false; | |
227 | } | |
228 | ||
229 | return true; | |
230 | } |