用VC6.0实现上位机串口通信.rar_KRY_VC6.0 实现上位机串口通信_WIN32 上位机_win32串口_串口API

1 #if !defined(_COMM_ACCESS_FUNCTIONS_AND_DATA) 2 #define _COMM_ACCESS_FUNCTIONS_AND_DATA 3 #if _MSC_VER > 1000 4 #pragma once 5 #endif // _MSC_VER > 1000 6 #define EVENTCHAR 0x0d 7 #define MAXBLOCKLENGTH 59 8 9 extern BYTE XwCom; 10 extern BYTE sCom1[5],sCom2[MAXBLOCKLENGTH+12]； 11 extern sCom3[MAXBLOCKLENGTH+12]; 12 extern BYTE opation; 13 extern short ComNum; 14 15 #define FC_DTRDSR 0x01 16 #define FC_RTSCTS 0x02 17 #define FC_XONXOFF 0x04 18 #define ASCII_BEL 0x07 19 #define ASCII_BS 0x08 20 #define ASCII_LF 0x0A 21 #define ASCII_CR 0x0D 22 #define ASCII_XON 0x11 23 #define ASCII_XOFF 0x13 24 25 class CComStatus 26 { 27 　public: 28 　　HANDLE m_hCom; 29 　　BYTE m_bComId; 30 　　BYTE m_bByteSize; 31 　　BYTE m_bStopBits; 32 　　BYTE m_bParity; 33 　　DWORD m_dwBaudRate; 34 35 　　//WORD m_fChEvt; 36 37 　　char m_bEvtChar; 38 　　DWORD m_fBinary; 39 　　BOOL m_bConnected; 40 　　BOOL m_fXonXoff; 41 　　BOOL m_bFlowCtrl; 42 　　OVERLAPPED m_rdos; 43 　　OVERLAPPED m_wtos; 44 45 　　//functions 46 47 　　CComStatus(); 48 　　CComStatus(BYTE bComId,BYTE bByteSize,BYTE bStopBits,BYTE bParity, 49 　　　　DWORD dwBaudRate,/*WORD fChEvt,*/char bEvtChar,DWORD fBinary); 50 　　BOOL OpenConnection(); 51 　　BOOL CloseConnection(); 52 　　BOOL SetupConnection(); 53 　　BOOL IsConnected(); 54 }; 55 56 UINT CommWatchProc( LPVOID lpData ); 57 BOOL WriteCommBlock( CComStatus& comDev, LPSTR lpByte , DWORD dwBytesToWrite); 58 int ReadCommBlock(CComStatus& comDev,LPSTR lpszBlock, int nMaxLength ); 59 int ReadCommBlockEx(CComStatus& comDev,LPSTR lpszBlock, int nMaxLength,DWORD dwTimeOut); 60 #endif 61 62 /////////////////////////////////////////////////////////////////////// 63 64 #include "stdafx.h" 65 #include "com232.h" 66 67 BYTE XwCom=0x40; 68 BYTE sCom1[5],sCom2[MAXBLOCKLENGTH+12],sCom3[MAXBLOCKLENGTH+12]; 69 BYTE opation; 70 short ComNum; 71 CComStatus::CComStatus() 72 { 73 　m_hCom = NULL; 74 　m_bComId = (char)ComNum;//COM1 75 　m_bByteSize=8; 76 　m_bStopBits=ONESTOPBIT; 77 　m_bParity=NOPARITY; 78 　m_dwBaudRate=9600; 79 　m_bEvtChar=EVENTCHAR; 80 　m_fBinary=1; 81 　m_bConnected = FALSE; 82 　m_bFlowCtrl = FC_XONXOFF ; 83 　m_fXonXoff = FALSE; 84 } 85 86 CComStatus::CComStatus(BYTE bComId,BYTE bByteSize,BYTE bStopBits,BYTE bParity,DWORD dwBaudRate,/*WORD fChEvt,*/char bEvtChar,DWORD fBinary) 87 { 88 　m_hCom = NULL; 89 　m_bComId = bComId; 90 　m_bByteSize=bByteSize; 91 　m_bStopBits=bStopBits; 92 　m_bParity=bParity; 93 　m_dwBaudRate=dwBaudRate; 94 　m_bEvtChar=bEvtChar; 95 　m_fBinary=fBinary; 96 　m_bConnected = FALSE; 97 　m_bFlowCtrl = FC_XONXOFF ; 98 　m_fXonXoff = FALSE; 99 } 100 101 BOOL CComStatus::OpenConnection() 102 { 103 　char csCom[10]; 104 　COMMTIMEOUTS CommTimeOuts ; 105 　if((m_bComId < 0) || (m_bComId > 4)) 106 　　return FALSE;//从COM1到COM4 107 　if(m_hCom)//if already open 108 　return FALSE; 109 110 　//OVERLAPPED包含异步I/O信息 111 112 　m_rdos.Offset = 0; 113 　m_rdos.OffsetHigh = 0; 114 　m_rdos.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL); 115 　if(m_rdos.hEvent == NULL) 116 　　return FALSE; 117 　m_wtos.Offset = 0; 118 　m_wtos.OffsetHigh = 0; 119 　m_wtos.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL); 120 　if(m_wtos.hEvent == NULL) 121 　{ 122 　　CloseHandle(m_rdos.hEvent); 123 　　return FALSE; 124 　} 125 126 　wsprintf(csCom,"COM%d",m_bComId); 127 128 　m_hCom = CreateFile(csCom,GENERIC_READ | GENERIC_WRITE, 0,NULL, OPEN_EXISTING,ILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,NULL); 129 130 　if(m_hCom == INVALID_HANDLE_VALUE) { 131 　　//dwError = GetLastError(); 132 　　// handle error 133 　　return FALSE; 134 　} 135 　else 136 　{ 137 　　SetCommMask( m_hCom, EV_RXCHAR ) ; // get any early notifications 138 　　SetupComm( m_hCom, 4096, 4096 ) ; // setup device buffers 139 　　// purge any information in the buffer 140 141 　　PurgeComm( m_hCom, PURGE_TXABORT | PURGE_RXABORT |PURGE_TXCLEAR | PURGE_RXCLEAR ) ; 142 143 　　// set up for overlapped I/O 144 145 　　DWORD dwTemp = 1000 / (this->m_dwBaudRate / 8); 146 　　CommTimeOuts.ReadIntervalTimeout = 0xFFFFFFFF ; 147 　　CommTimeOuts.ReadTotalTimeoutMultiplier = 0;//((dwTemp > 0) ? dwTemp : 1); 148 　　CommTimeOuts.ReadTotalTimeoutConstant = 1000 ; 149 150 　　// CBR_9600 is approximately 1byte/ms. For our purposes, allow 151 　　// double the expected time per character for a fudge factor. 152 153 　　CommTimeOuts.WriteTotalTimeoutMultiplier =2*CBR_9600/this->m_dwBaudRate;//( npTTYInfo ) ; 154 　　CommTimeOuts.WriteTotalTimeoutConstant = 0;//1000 ; 155 156 　　SetCommTimeouts( m_hCom, &CommTimeOuts ) ; 157 　} 158 　if(!SetupConnection()) 159 　{ 160 　　CloseConnection(); 161 　　return FALSE; 162 　} 163 　EscapeCommFunction( m_hCom, SETDTR ); 164 　m_bConnected = TRUE; 165 　return TRUE; 166 } 167 168 BOOL CComStatus::CloseConnection() 169 { 170 　if (NULL == m_hCom) 171 　　return ( TRUE ) ; 172 　// set connected flag to FALSE 173 　m_bConnected = FALSE; 174 　// disable event notification and wait for thread 175 　// to halt 176 　SetCommMask( m_hCom, 0 ) ; 177 　EscapeCommFunction( m_hCom, CLRDTR ) ; 178 　// purge any outstanding reads/writes and close device handle 179 　PurgeComm( m_hCom, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR ) ; 180 　CloseHandle( m_hCom ) ; 181 　m_hCom = NULL; 182 183 　// change the selectable items in the menu 184 185 　CloseHandle(m_rdos.hEvent); 186 　CloseHandle(m_wtos.hEvent); 187 　return ( TRUE ) ; 188 } 189 190 BOOL CComStatus::SetupConnection() 191 { 192 　BOOL fRetVal ; 193 　BYTE bSet ; 194 　DCB dcb ; 195 　if(m_hCom == NULL) 196 　　return FALSE; 197 　dcb.DCBlength = sizeof( DCB ) ; 198 　GetCommState( m_hCom, &dcb ) ; 199 　dcb.BaudRate = this->m_dwBaudRate; 200 　dcb.ByteSize = this->m_bByteSize; 201 　dcb.Parity = this->m_bParity; 202 　dcb.StopBits = this->m_bStopBits ; 203 　dcb.EvtChar = this->m_bEvtChar ; 204 　// setup hardware flow control 205 　bSet = (BYTE) ((m_bFlowCtrl & FC_DTRDSR) != 0) ; 206 　dcb.fOutxDsrFlow = bSet ; 207 　if (bSet) 208 　　dcb.fDtrControl = DTR_CONTROL_HANDSHAKE ; 209 　else 210 　　dcb.fDtrControl = DTR_CONTROL_ENABLE ; 211 　bSet = (BYTE) ((m_bFlowCtrl & FC_RTSCTS) != 0) ; 212 　dcb.fOutxCtsFlow = bSet ; 213 　if (bSet) 214 　　dcb.fRtsControl = RTS_CONTROL_HANDSHAKE ; 215 　else 216 　　dcb.fRtsControl = RTS_CONTROL_ENABLE ; 217 　// setup software flow control 218 　bSet = (BYTE) ((m_bFlowCtrl & FC_XONXOFF) != 0) ; 219 　dcb.fInX = dcb.fOutX = bSet ; 220 　dcb.XonChar = ASCII_XON ; 221 　char xon = ASCII_XON ; 222 　dcb.XoffChar = ASCII_XOFF ; 223 　char xoff = ASCII_XOFF ; 224 　dcb.XonLim = 100 ; 225 　dcb.XoffLim = 100 ; 226 　// other various settings 227 　dcb.fBinary = TRUE ; 228 　dcb.fParity = TRUE ; 229 　fRetVal = SetCommState( m_hCom, &dcb ) ; 230 　return ( fRetVal ) ; 231 } // end of SetupConnection() 232 233 BOOL CComStatus::IsConnected() 234 { 235 　return m_bConnected; 236 } 237 238 UINT CommWatchProc( LPVOID lpData ) 239 { 240 　DWORD dwEvtMask ; 241 　//NPTTYINFO npTTYInfo = (NPTTYINFO) lpData ; 242 　OVERLAPPED os ; 243 　int nLength ; 244 　//BYTE abIn[ MAXBLOCK + 1] ; 245 246 　CComStatus * pCom = (CComStatus *)lpData; 247 　memset( &os, 0, sizeof( OVERLAPPED ) ) ; 248 　// create I/O event used for overlapped read 249 250 　os.hEvent = CreateEvent( NULL, // no security 251 　　TRUE, // explicit reset req 252 　　FALSE, // initial event reset 253 　　NULL ) ; // no name 254 255 　if (os.hEvent == NULL) 256 　{ 257 　　MessageBox( NULL, "Failed to create event for thread!", "TTY Error!",MB_ICONEXCLAMATION | MB_OK ) ; 258 　　return ( FALSE ) ; 259