1 | //====================================================================== |
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2 | // |
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3 | // Project: XTIDE Universal BIOS, Serial Port Server |
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4 | // |
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5 | // File: Win32Serial.h - Microsoft Windows serial code |
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6 | // |
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7 | |
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8 | #include <stdio.h> |
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9 | #include "windows.h" |
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10 | #include "../library/library.h" |
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11 | |
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12 | #define PIPENAME "\\\\.\\pipe\\xtide" |
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13 | |
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14 | class SerialAccess |
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15 | { |
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16 | public: |
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17 | void Connect( char *name, struct baudRate *p_baudRate ) |
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18 | { |
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19 | char buff1[20], buff2[1024]; |
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20 | |
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21 | baudRate = p_baudRate; |
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22 | |
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23 | pipe = NULL; |
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24 | |
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25 | if( !name ) |
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26 | { |
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27 | for( int t = 1; t <= 30 && !name; t++ ) |
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28 | { |
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29 | sprintf( buff1, "COM%d", t ); |
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30 | if( QueryDosDeviceA( buff1, buff2, sizeof(buff2) ) ) |
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31 | name = buff1; |
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32 | } |
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33 | if( !name ) |
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34 | log( -1, "No physical COM ports found" ); |
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35 | } |
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36 | |
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37 | if( name[0] == '\\' && name[1] == '\\' ) |
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38 | { |
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39 | log( 0, "Opening named pipe %s (simulating %s baud)", name, baudRate->display ); |
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40 | |
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41 | pipe = CreateNamedPipeA( name, PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE|PIPE_REJECT_REMOTE_CLIENTS, 2, 1024, 1024, 0, NULL ); |
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42 | if( pipe == INVALID_HANDLE_VALUE ) |
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43 | log( -1, "Could not CreateNamedPipe " PIPENAME ); |
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44 | |
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45 | if( !ConnectNamedPipe( pipe, NULL ) ) |
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46 | log( -1, "Could not ConnectNamedPipe" ); |
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47 | |
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48 | if( baudRate->divisor > 0x80 ) |
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49 | log( -1, "Cannot simulate baud rates with hardware multipliers" ); |
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50 | |
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51 | speedEmulation = 1; |
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52 | resetConnection = 1; |
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53 | } |
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54 | else |
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55 | { |
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56 | if( QueryDosDeviceA( name, buff2, sizeof(buff2) ) ) |
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57 | { |
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58 | COMMTIMEOUTS timeouts; |
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59 | DCB dcb; |
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60 | |
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61 | log( 0, "Opening %s (%s baud)", name, baudRate->display ); |
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62 | |
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63 | pipe = CreateFileA( name, GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 ); |
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64 | if( pipe == INVALID_HANDLE_VALUE ) |
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65 | log( -1, "Could not Open \"%s\"", name ); |
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66 | |
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67 | FillMemory(&dcb, sizeof(dcb), 0); |
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68 | FillMemory(&timeouts, sizeof(timeouts), 0); |
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69 | |
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70 | dcb.DCBlength = sizeof(dcb); |
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71 | dcb.BaudRate = baudRate->rate; |
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72 | dcb.ByteSize = 8; |
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73 | dcb.StopBits = ONESTOPBIT; |
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74 | dcb.Parity = NOPARITY; |
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75 | if( !SetCommState( pipe, &dcb ) ) |
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76 | { |
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77 | char *msg = ""; |
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78 | COMMPROP comProp; |
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79 | |
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80 | if( GetCommProperties( pipe, &comProp ) ) |
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81 | { |
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82 | if( comProp.dwMaxBaud != BAUD_USER ) |
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83 | msg = "\n On this COM port, baud rate is limited to 115.2K"; |
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84 | } |
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85 | log( -1, "Could not SetCommState: baud rate selected may not be available%s", msg ); |
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86 | } |
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87 | |
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88 | if( !SetCommTimeouts( pipe, &timeouts ) ) |
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89 | log( -1, "Could not SetCommTimeouts" ); |
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90 | } |
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91 | else |
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92 | { |
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93 | char logbuff[ 1024 ]; |
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94 | |
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95 | EnumerateCOMPorts( logbuff, 1024 ); |
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96 | |
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97 | log( -1, "Serial port '%s' not found, detected COM ports: %s", name, logbuff ); |
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98 | } |
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99 | } |
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100 | } |
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101 | |
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102 | static void EnumerateCOMPorts( char *logbuff, int logbuffLen ) |
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103 | { |
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104 | int found = 0; |
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105 | char buff1[20], buff2[1024]; |
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106 | |
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107 | logbuff[0] = 0; |
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108 | |
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109 | for( int t = 1; t <= 40 && strlen(logbuff) < (logbuffLen - 40); t++ ) |
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110 | { |
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111 | sprintf( buff1, "COM%d", t ); |
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112 | if( QueryDosDeviceA( buff1, buff2, sizeof(buff2) ) ) |
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113 | { |
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114 | if( found ) |
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115 | strcat( logbuff, ", " ); |
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116 | strcat( logbuff, buff1 ); |
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117 | found = 1; |
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118 | } |
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119 | } |
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120 | |
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121 | if( !found ) |
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122 | strcat( logbuff, "(none)" ); |
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123 | } |
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124 | |
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125 | void Disconnect() |
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126 | { |
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127 | if( pipe ) |
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128 | { |
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129 | CloseHandle( pipe ); |
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130 | pipe = NULL; |
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131 | } |
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132 | } |
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133 | |
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134 | unsigned long readCharacters( void *buff, unsigned long len ) |
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135 | { |
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136 | unsigned long readLen; |
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137 | int ret; |
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138 | |
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139 | ret = ReadFile( pipe, buff, len, &readLen, NULL ); |
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140 | |
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141 | if( !ret || readLen == 0 ) |
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142 | { |
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143 | if( GetLastError() == ERROR_BROKEN_PIPE ) |
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144 | return( 0 ); |
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145 | else |
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146 | log( -1, "read serial failed (error code %d)", GetLastError() ); |
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147 | } |
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148 | |
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149 | return( readLen ); |
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150 | } |
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151 | |
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152 | int writeCharacters( void *buff, unsigned long len ) |
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153 | { |
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154 | unsigned long writeLen; |
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155 | int ret; |
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156 | |
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157 | ret = WriteFile( pipe, buff, len, &writeLen, NULL ); |
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158 | |
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159 | if( !ret || len != writeLen ) |
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160 | { |
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161 | if( GetLastError() == ERROR_BROKEN_PIPE ) |
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162 | return( 0 ); |
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163 | else |
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164 | log( -1, "write serial failed (error code %d)", GetLastError() ); |
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165 | } |
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166 | |
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167 | return( 1 ); |
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168 | } |
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169 | |
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170 | SerialAccess() |
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171 | { |
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172 | pipe = NULL; |
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173 | speedEmulation = 0; |
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174 | resetConnection = 0; |
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175 | baudRate = NULL; |
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176 | } |
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177 | |
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178 | ~SerialAccess() |
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179 | { |
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180 | Disconnect(); |
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181 | } |
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182 | |
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183 | int speedEmulation; |
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184 | int resetConnection; |
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185 | |
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186 | struct baudRate *baudRate; |
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187 | |
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188 | private: |
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189 | HANDLE pipe; |
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190 | }; |
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191 | |
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