Mercurial > ecos

annotate host/tools/Utils/common/eCosSerial.cpp @ 82:6736c52df507 ecos-sw-2000-04-14

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Merge from eCos master repository on 2000-04-14-13:35:46-BST
author jlarmour
date Tue, 18 Apr 2000 21:51:55 +0000
parents
children 6ed91473a1cd
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1 //####COPYRIGHTBEGIN####
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2 //
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3 // ----------------------------------------------------------------------------
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4 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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5 //
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6 // This program is part of the eCos host tools.
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7 //
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8 // This program is free software; you can redistribute it and/or modify it
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9 // under the terms of the GNU General Public License as published by the Free
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10 // Software Foundation; either version 2 of the License, or (at your option)
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11 // any later version.
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12 //
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13 // This program is distributed in the hope that it will be useful, but WITHOUT
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14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 // more details.
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17 //
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18 // You should have received a copy of the GNU General Public License along with
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19 // this program; if not, write to the Free Software Foundation, Inc.,
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20 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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21 //
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22 // ----------------------------------------------------------------------------
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23 //
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24 //####COPYRIGHTEND####
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25 //=================================================================
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26 //
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27 // eCosSerial.cpp
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28 //
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29 // Serial test class
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30 //
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31 //=================================================================
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32 //=================================================================
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33 //#####DESCRIPTIONBEGIN####
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34 //
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35 // Author(s): sdf
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36 // Contributors: sdf
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37 // Date: 1999-04-01
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38 // Description: This class abstracts the serial port for use in the testing infrastructure
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39 // Usage:
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40 //
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41 //####DESCRIPTIONEND####
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42
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43 #include "eCosStd.h"
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44 #include "eCosSerial.h"
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45 #include "eCosThreadUtils.h"
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46 #include "eCosTrace.h"
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47
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48 CeCosSerial::CeCosSerial():
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49 m_nErr(0),
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50 m_pHandle(0),
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51 m_nDataBits(8),
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52 m_nStopBits(ONE_STOP_BIT),
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53 m_bParity(false),
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54 m_nBaud(0),
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55 m_nTotalReadTimeout(10*1000),
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56 m_nTotalWriteTimeout(10*1000),
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57 m_nInterCharReadTimeout(500),
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58 m_nInterCharWriteTimeout(500),
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59 m_bBlockingReads(true)
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60 {
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61 }
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62
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63 CeCosSerial::~CeCosSerial()
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64 {
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65 Close();
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66 }
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67
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68 CeCosSerial::CeCosSerial(LPCTSTR pszPort,int nBaud):
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69 m_nErr(0),
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70 m_pHandle(0),
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71 m_nDataBits(8),
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72 m_nStopBits(ONE_STOP_BIT),
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73 m_bParity(false),
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74 m_nTotalReadTimeout(10*1000),
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75 m_nTotalWriteTimeout(10*1000),
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76 m_nInterCharReadTimeout(500),
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77 m_nInterCharWriteTimeout(500),
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78 m_bBlockingReads(true)
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79 {
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80 Open(pszPort,nBaud);
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81 }
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82
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83 bool CeCosSerial::SetBlockingReads(bool b,bool bApplySettingsNow/*=true*/)
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84 {
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85 m_bBlockingReads=b;
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86 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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87 }
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88
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89 bool CeCosSerial:: SetBaud(unsigned int nBaud,bool bApplySettingsNow/*=true*/)
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90 {
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91 m_nBaud=nBaud;
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92 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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93 }
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94
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95 bool CeCosSerial:: SetParity(bool bParityOn,bool bApplySettingsNow/*=true*/)
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96 {
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97 m_bParity=bParityOn;
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98 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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99 }
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100
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101 bool CeCosSerial:: SetDataBits(int n,bool bApplySettingsNow/*=true*/)
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102 {
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103 m_nDataBits=n;
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104 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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105 }
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106
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107 bool CeCosSerial:: SetStopBits(StopBitsType n,bool bApplySettingsNow/*=true*/)
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108 {
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109 m_nStopBits=n;
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110 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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111 }
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112
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113 bool CeCosSerial:: SetReadTimeOuts(int nTotal,int nBetweenChars,bool bApplySettingsNow/*=true*/) // mSec
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114 {
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115 m_nTotalReadTimeout=nTotal;
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116 m_nInterCharReadTimeout=nBetweenChars;
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117
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118 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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119 }
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120
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121 bool CeCosSerial:: SetWriteTimeOuts(int nTotal,int nBetweenChars,bool bApplySettingsNow/*=true*/) // mSec
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122 {
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123 m_nTotalWriteTimeout=nTotal;
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124 m_nInterCharWriteTimeout=nBetweenChars;
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125 return 0==m_pHandle || !bApplySettingsNow || ApplySettings();
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126 }
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127
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128 #ifdef _WIN32
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129 bool CeCosSerial::Open(LPCTSTR pszPort,int nBaud)
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130 {
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131 bool rc=false;
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132 m_nBaud=nBaud,
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133 m_strPort=pszPort;
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134 HANDLE hCom=::CreateFile(pszPort,GENERIC_READ|GENERIC_WRITE, 0,NULL,OPEN_EXISTING,0,NULL);
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135 SaveError();
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136 if (INVALID_HANDLE_VALUE==hCom) {
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137 ERROR(_T("Failed to open port %s - %s\n"),pszPort,(LPCTSTR)ErrString());
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138 } else {
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139 m_pHandle=(void *)hCom;
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140 if(ApplySettings()){
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141 Flush();
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142 rc=true;
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143 } else {
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144 Close();
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145 }
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146 }
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147 return rc;
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148 }
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149
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diff changeset
150 bool CeCosSerial::Close()
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151 {
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152 bool rc=false;
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153 if(m_pHandle){
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154 try {
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155 rc=(TRUE==CloseHandle((HANDLE)m_pHandle));
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156 }
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157 catch(...) {
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158 TRACE(_T("!!! Exception caught closing serial handle %08x\n"),m_pHandle);
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159 }
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160 m_pHandle=0;
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161 } else {
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162 rc=true;
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163 }
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164 return rc;
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165 }
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166
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167 bool CeCosSerial::ApplySettings()
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168 {
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169 bool rc=false;
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170 try {
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171 DCB dcb;
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172
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173 ZeroMemory(&dcb,sizeof dcb);
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174 dcb.DCBlength=sizeof dcb;
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175 dcb.BaudRate=m_nBaud;
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176 dcb.fBinary=true;
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177 dcb.fParity=true;
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178 dcb.Parity=(BYTE) ((m_bParity) ? EVENPARITY : NOPARITY);
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179 dcb.StopBits=(BYTE)m_nStopBits;
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180 dcb.ByteSize=(BYTE)m_nDataBits;
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181 LPCTSTR arpszStopbits[3]={_T("1"),_T("1.5"),_T("2")};
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182 TRACE(_T("Applysettings baud=%d Parity=%d stopbits=%s databits=%d\n"),
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183 dcb.BaudRate,
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184 dcb.Parity,
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185 arpszStopbits[dcb.StopBits],
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186 dcb.ByteSize);
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187
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188 // No control over the following yet
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189 dcb.fDtrControl=DTR_CONTROL_ENABLE;
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190 dcb.fTXContinueOnXoff=1;
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191 dcb.fRtsControl=RTS_CONTROL_ENABLE;
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192 dcb.fAbortOnError=1;
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193 dcb.XonLim=2048;
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194 dcb.XoffLim=512;
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195 dcb.XonChar=17;
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196 dcb.XoffChar=19;
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197
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198 HANDLE hCom=(HANDLE)m_pHandle;
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199 if (!SetCommState(hCom, &dcb)) {
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200 SaveError();
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201 ERROR(_T("Failed to set comm state - port %s handle=%d err=%d\n"),(LPCTSTR)m_strPort,hCom,GetLastError());
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202 } else {
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203 COMMTIMEOUTS commtimeouts;
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204 if(m_bBlockingReads){
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205 commtimeouts.ReadIntervalTimeout=m_nInterCharReadTimeout;
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206 commtimeouts.ReadTotalTimeoutMultiplier=0;
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207 commtimeouts.ReadTotalTimeoutConstant=m_nTotalReadTimeout;
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208 } else {
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209 commtimeouts.ReadIntervalTimeout=MAXDWORD;
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210 commtimeouts.ReadTotalTimeoutMultiplier=0;
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211 commtimeouts.ReadTotalTimeoutConstant=0;
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212 }
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213 commtimeouts.WriteTotalTimeoutMultiplier=m_nTotalWriteTimeout;
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214 commtimeouts.WriteTotalTimeoutConstant=m_nInterCharWriteTimeout;
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215
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216 if (SetCommTimeouts(hCom, &commtimeouts)) {
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217 rc=true;
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218 } else {
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219 SaveError();
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220 ERROR(_T("Failed to set comm timeouts - port %s\n"),(LPCTSTR)m_strPort);
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221 }
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222 }
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223 }
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diff changeset
224 catch(...)
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225 {
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226 TRACE(_T("!!! Exception caught in CeCosSerial::ApplySettings!!!\n"));
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227 }
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228 return rc;
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229 }
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230
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231 bool CeCosSerial::Read (void *pBuf,unsigned int nSize,unsigned int &nRead)
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232 {
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233 bool rc=(TRUE==ReadFile((HANDLE)m_pHandle,pBuf,nSize,(LPDWORD)&nRead,0));
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234 SaveError();
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235 return rc;
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diff changeset
236 }
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237
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238 bool CeCosSerial::Write(void *pBuf,unsigned int nSize,unsigned int &nWritten)
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239 {
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240 bool rc=(TRUE==WriteFile((HANDLE)m_pHandle,pBuf,nSize,(LPDWORD)&nWritten,0));
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241 SaveError();
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242 return rc;
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jlarmour
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243 }
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244
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245 bool CeCosSerial::ClearError()
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246 {
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diff changeset
247 DWORD dwErrors;
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248 bool rc=(TRUE==ClearCommError(HANDLE(m_pHandle),&dwErrors,0));
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249 if(dwErrors&CE_BREAK)TRACE(_T("The hardware detected a break condition.\n"));
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250 if(dwErrors&CE_DNS)TRACE(_T("Windows 95 and Windows 98: A parallel device is not selected.\n"));
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251 if(dwErrors&CE_FRAME)TRACE(_T("The hardware detected a framing error.\n"));
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252 if(dwErrors&CE_IOE)TRACE(_T("An I/O error occurred during communications with the device.\n"));
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253 if(dwErrors&CE_MODE)TRACE(_T("The requested mode is not supported, or the hFile parameter is invalid. If this value is specified, it is the only valid error.\n"));
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254 if(dwErrors&CE_OOP)TRACE(_T("Windows 95 and Windows 98: A parallel device signaled that it is out of paper.\n"));
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255 if(dwErrors&CE_OVERRUN)TRACE(_T("A character-buffer overrun has occurred. The next character is lost.\n"));
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256 if(dwErrors&CE_PTO)TRACE(_T("Windows 95 and Windows 98: A time-out occurred on a parallel device.\n"));
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257 if(dwErrors&CE_RXOVER)TRACE(_T("An input buffer overflow has occurred. There is either no room in the input buffer, or a character was received after the end-of-file (EOF) character.\n"));
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258 if(dwErrors&CE_RXPARITY)TRACE(_T("The hardware detected a parity error.\n"));
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259 if(dwErrors&CE_TXFULL)TRACE(_T("The application tried to transmit a character, but the output buffer was full.\n"));
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260 return rc;
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jlarmour
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261 }
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jlarmour
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diff changeset
262
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263 bool CeCosSerial::Flush (void)
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264 {
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265 bool rc=(TRUE==PurgeComm ((HANDLE)m_pHandle,PURGE_TXCLEAR|PURGE_RXCLEAR));
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266 SaveError();
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267 return rc;
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268 }
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269
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270 String CeCosSerial::ErrString() const
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271 {
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272 String str;
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273 LPVOID lpMsgBuf;
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274 FormatMessage(
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diff changeset
275 FORMAT_MESSAGE_ALLOCATE_BUFFER |
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diff changeset
276 FORMAT_MESSAGE_FROM_SYSTEM |
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277 FORMAT_MESSAGE_IGNORE_INSERTS,
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diff changeset
278 NULL,
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279 m_nErr,
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280 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
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281 (LPTSTR) &lpMsgBuf,
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diff changeset
282 0,
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diff changeset
283 NULL
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jlarmour
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diff changeset
284 );
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285 str=(LPCTSTR)lpMsgBuf;
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jlarmour
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diff changeset
286 // Free the buffer.
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diff changeset
287 LocalFree( lpMsgBuf );
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288 return str;
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jlarmour
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diff changeset
289 }
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diff changeset
290
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291 #else // UNIX
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292
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293 String CeCosSerial::ErrString() const
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294 {
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295 return strerror(errno);
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296 }
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297
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diff changeset
298 bool CeCosSerial::Close()
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299 {
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300 bool rc=m_pHandle && (-1!=close((int)m_pHandle));
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301 m_pHandle=0;
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302 return rc;
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303 }
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304
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305 bool CeCosSerial::Open(LPCTSTR pszPort,int nBaud)
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306 {
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307 bool rc=false;
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308 m_nBaud=nBaud,
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309 m_strPort=pszPort;
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310 int fd = open(pszPort,O_RDWR|O_NONBLOCK);
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311 if (-1==fd) {
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312 ERROR(_T("Failed to open port %s\n"),pszPort);
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313 return false;
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314 } else {
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315 m_pHandle=(void *)fd;
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316 if(ApplySettings()){
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317 rc=true;
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318 } else {
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319 Close();
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320 ERROR(_T("Failed to apply settings.\n"));
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321 return false;
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322 }
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323 }
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324 return rc;
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325 }
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326
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327 bool CeCosSerial::ApplySettings()
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328 {
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329 struct termios buf, buf_verify;
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330 int rate;
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331
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332 // Clear the two structures so we can make a binary comparison later on.
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333 memset(&buf, 0, sizeof(buf));
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334 memset(&buf_verify, 0, sizeof(buf_verify));
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335
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336 LPCTSTR arpszStopbits[3]={_T("1"),_T("1.5"),_T("2")};
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337 TRACE(_T("Applysettings baud=%d bParity=%d stopbits=%s databits=%d\n"),
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338 m_nBaud,
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339 m_bParity,
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340 arpszStopbits[m_nStopBits],
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341 m_nDataBits);
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342
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343 switch(m_nBaud) {
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344 case 110:
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345 rate = B110;
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346 break;
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347 case 150:
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348 rate = B150;
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349 break;
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350 case 300:
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351 rate = B300;
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352 break;
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353 case 600:
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354 rate = B600;
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355 break;
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356 case 1200:
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357 rate = B1200;
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358 break;
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359 case 2400:
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360 rate = B2400;
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361 break;
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diff changeset
362 case 4800:
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363 rate = B4800;
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364 break;
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365 case 9600:
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366 rate = B9600;
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367 break;
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368 case 19200:
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diff changeset
369 rate = B19200;
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370 break;
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371 case 38400:
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diff changeset
372 rate = B38400;
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373 break;
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diff changeset
374 case 57600:
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375 rate = B57600;
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376 break;
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diff changeset
377 case 115200:
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378 rate = B115200;
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379 break;
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380 default:
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381 return false;
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diff changeset
382 };
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383
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384 TRACE(_T("Changing configuration...\n"));
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diff changeset
385
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jlarmour
parents:
diff changeset
386 // Get current settings.
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diff changeset
387 if (tcgetattr((int) m_pHandle, &buf)) {
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diff changeset
388 fprintf(stderr, _T("Error: tcgetattr\n"));
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389 return false;
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diff changeset
390 }
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diff changeset
391
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jlarmour
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diff changeset
392 // Reset to raw.
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diff changeset
393 buf.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
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diff changeset
394 |INLCR|IGNCR|ICRNL|IXON);
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diff changeset
395 buf.c_oflag &= ~OPOST;
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diff changeset
396 buf.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
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jlarmour
parents:
diff changeset
397 buf.c_cflag &= ~(CSIZE|PARENB);
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diff changeset
398 buf.c_cflag |= CS8;
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jlarmour
parents:
diff changeset
399
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jlarmour
parents:
diff changeset
400 // Set baud rate.
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jlarmour
parents:
diff changeset
401 cfsetispeed(&buf, rate);
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jlarmour
parents:
diff changeset
402 cfsetospeed(&buf, rate);
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jlarmour
parents:
diff changeset
403
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jlarmour
parents:
diff changeset
404 // Set data bits.
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jlarmour
parents:
diff changeset
405 {
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jlarmour
parents:
diff changeset
406 int data_bits[9] = {0, 0, 0, 0, 0, CS5, CS6, CS7, CS8};
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jlarmour
parents:
diff changeset
407
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jlarmour
parents:
diff changeset
408 buf.c_cflag &= ~CSIZE;
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jlarmour
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diff changeset
409 buf.c_cflag |= data_bits[m_nDataBits];
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jlarmour
parents:
diff changeset
410 }
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jlarmour
parents:
diff changeset
411
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jlarmour
parents:
diff changeset
412 // Set stop bits.
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jlarmour
parents:
diff changeset
413 {
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jlarmour
parents:
diff changeset
414 buf.c_cflag &= ~CSTOPB;
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jlarmour
parents:
diff changeset
415 if (ONE_STOP_BIT != m_nStopBits)
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jlarmour
parents:
diff changeset
416 buf.c_cflag |= CSTOPB;
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jlarmour
parents:
diff changeset
417 }
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jlarmour
parents:
diff changeset
418
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jlarmour
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diff changeset
419 // Set parity.
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jlarmour
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diff changeset
420 {
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diff changeset
421 buf.c_cflag &= ~(PARENB | PARODD); // no parity.
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jlarmour
parents:
diff changeset
422 if (m_bParity) // even parity.
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jlarmour
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diff changeset
423 buf.c_cflag |= PARENB;
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jlarmour
parents:
diff changeset
424 }
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jlarmour
parents:
diff changeset
425
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jlarmour
parents:
diff changeset
426 // Set the new settings
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jlarmour
parents:
diff changeset
427 if (tcsetattr((int) m_pHandle, TCSADRAIN, &buf)) {
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jlarmour
parents:
diff changeset
428 fprintf(stderr, _T("Error: tcsetattr\n"));
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jlarmour
parents:
diff changeset
429 return false;
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jlarmour
parents:
diff changeset
430 }
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jlarmour
parents:
diff changeset
431
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jlarmour
parents:
diff changeset
432 // Now read back the settings. On SunOS tcsetattr only returns
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jlarmour
parents:
diff changeset
433 // error if _all_ settings fail. If just a few settings are not
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jlarmour
parents:
diff changeset
434 // supported, the call returns true while the hardware is set to a
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jlarmour
parents:
diff changeset
435 // combination of old and new settings.
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jlarmour
parents:
diff changeset
436 if (tcgetattr((int) m_pHandle, &buf_verify)) {
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jlarmour
parents:
diff changeset
437 fprintf(stderr, _T("Error: tcgetattr\n"));
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jlarmour
parents:
diff changeset
438 return false;
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jlarmour
parents:
diff changeset
439 }
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jlarmour
parents:
diff changeset
440 if (memcmp(&buf, &buf_verify, sizeof(buf))) {
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jlarmour
parents:
diff changeset
441 fprintf(stderr, _T("Error: termios verify failed\n"));
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jlarmour
parents:
diff changeset
442 return false;
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jlarmour
parents:
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443 }
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444
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445 // A slight delay to allow things to settle.
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446 CeCosThreadUtils::Sleep(10);
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447
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448 TRACE(_T("Done.\n"));
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449
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450 return true;
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451 }
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452
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453 bool CeCosSerial::Flush (void)
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454 {
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455 return 0==tcflush((int) m_pHandle, TCIOFLUSH);
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456 }
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457
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458 bool CeCosSerial::Read (void *pBuf,unsigned int nSize,unsigned int &nRead)
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459 {
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460
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461 if (!m_bBlockingReads) {
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462 nRead = 0;
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463 int n = read((int)m_pHandle, pBuf, nSize);
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464 if (-1 == n) {
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465 if (EAGAIN == errno)
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466 return true;
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467 ERROR(_T("Read failed: %d\n"), errno);
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468 return false;
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469 }
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470 nRead = n;
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471 return true;
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472 }
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473
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474 // Blocking reads: emulate the Windows semantics:
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475 // If m_nTotalReadTimeout elapses before we see the first TCHAR,
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476 // return.
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477 // If m_nInterCharReadTimeout elapses after reading any
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478 // subsequent TCHAR, return.
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479
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480 fd_set rfds;
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481 FD_ZERO(&rfds);
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482 FD_SET((int)m_pHandle, &rfds);
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483
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484 // Start with total timeout.
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485 struct timeval tv;
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486 tv.tv_sec = m_nTotalReadTimeout / 1000;
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487 tv.tv_usec = (m_nTotalReadTimeout % 1000) * 1000;
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488
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489 unsigned char* pData = (unsigned char*) pBuf;
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490 nRead = 0;
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491 while (nSize) {
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492 switch(select((int)m_pHandle + 1, &rfds, NULL, NULL, &tv)) {
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493 case 1:
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494 {
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495 int n = read((int)m_pHandle, pData, nSize);
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496 if (-1 == n && EAGAIN != errno) {
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497 ERROR(_T("Read failed: %d\n"), errno);
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498 return false; // FAILED
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499 }
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500 nRead += n;
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501 pData += n;
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502 nSize -= n;
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503
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504 // Now use inter-char timeout.
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505 tv.tv_sec = m_nInterCharReadTimeout / 1000;
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506 tv.tv_usec = (m_nInterCharReadTimeout % 1000) * 1000;
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507 }
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508 break;
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509 case 0:
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510 return true; // Timeout
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511 case -1:
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512 ERROR(_T("Select failed: %d\n"), errno);
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513 return false;
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514 }
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515 }
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diff changeset
516
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517 return true;
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518 }
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519
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520 bool CeCosSerial::Write(void *pBuf,unsigned int nSize,unsigned int &nWritten)
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521 {
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522 bool rc;
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523 int n=write((int)m_pHandle,pBuf,nSize);
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524 if(-1==n){
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525 nWritten=0;
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jlarmour
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diff changeset
526 if (errno == EAGAIN)
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527 rc = true;
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528 else
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diff changeset
529 rc=false;
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jlarmour
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530 } else {
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parents:
diff changeset
531 nWritten=n;
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532 rc=true;
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533 }
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534 return rc;
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535 }
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jlarmour
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diff changeset
536
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jlarmour
parents:
diff changeset
537 bool CeCosSerial::ClearError()
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jlarmour
parents:
diff changeset
538 {
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parents:
diff changeset
539 return false;
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jlarmour
parents:
diff changeset
540 }
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jlarmour
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diff changeset
541
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jlarmour
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542 #endif