【C++】VC++的modbus通讯
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VC modbus 读
http://blog.csdn.net/wu_jing_sheng0/article/details/50832522
static unsigned char auchCRCHi[] = {0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40} ;static unsigned char auchCRCLo[] = {0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4,0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD,0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7,0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE,0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2,0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB,0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91,0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88,0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80,0x40} ;unsigned short CRC16(unsigned char* puchMsg, unsigned char usDataLen)/* message to calculate CRC upon */ /* quantity of bytes in message */{ unsigned char uchCRCHi = 0xFF ; /* high byte of CRC initialized */ unsigned char uchCRCLo = 0xFF ; /* low byte of CRC initialized */ unsigned uIndex ; /* will index into CRC lookup table */ while (usDataLen--) /* pass through message buffer */ { uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC *///这几条没看明白 uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex]; uchCRCLo = auchCRCLo[uIndex] ; } *puchMsg++ = uchCRCHi; *puchMsg = uchCRCLo; return (uchCRCHi << 8 | uchCRCLo) ;}BOOL CSerialmodbusDlg::OnInitDialog(){ CDialog::OnInitDialog(); SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here m_MSComm.SetCommPort(1);//在设置选项里的port值不能初始时未能传递过来 m_MSComm.SetInputMode(1); m_MSComm.SetInBufferSize(1024); m_MSComm.SetOutBufferSize(512); m_MSComm.SetRThreshold(1); m_MSComm.SetInputLen(0); m_MSComm.SetSettings("9600,n,8,1"); if(!m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(TRUE); else MessageBox("打开串口出错"); m_MSComm.GetInput();//先预读以清除残留数据 return TRUE; // return TRUE unless you set the focus to a control}void CSerialmodbusDlg::open_serial(){ if(!m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(TRUE);//打开串口 //应该还有一些后续的操作情形,暂时留待协议能完成之后再行添加}void CSerialmodbusDlg::close_serial(){ if(m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(FALSE);}BEGIN_EVENTSINK_MAP(CSerialmodbusDlg, CDialog) //{{AFX_EVENTSINK_MAP(CSerialmodbusDlg) ON_EVENT(CSerialmodbusDlg, IDC_MSCOMM1, 1 /* OnComm */, OnOnCommMscomm1, VTS_NONE) //}}AFX_EVENTSINK_MAPEND_EVENTSINK_MAP()void CSerialmodbusDlg::OnOnCommMscomm1() { VARIANT variant_inp; COleSafeArray safearray_inp; long length,i; BYTE data[4096]; unsigned char sendback[8]; CString strtemp; CString strDisp; int nEvent=m_MSComm.GetCommEvent(); int k; switch (nEvent)//接收缓冲区内有字符 { case 2: k=m_MSComm.GetInBufferCount(); if(k>0) { variant_inp=m_MSComm.GetInput();//读取缓冲区内的数据 safearray_inp=variant_inp;//将VARIANT型变量转换为ColeSafeArray型变量 length=safearray_inp.GetOneDimSize();//确定数据长度 for(i=0;i<length;i++) safearray_inp.GetElement(&i,data+i);//将数据转换为BYTE型数组 for(i=0;i<length;i++) { BYTE bt=*(char*)(data+i);//字符型 *(sendback+i)=*(char*)(data+i); strtemp.Format("%02X",bt);//将字符送入临时变量strtemp存放 strDisp+=strtemp;//加入接收编辑框对应字符串 } int nlen=m_ctrlEditRec.GetWindowTextLength(); m_ctrlEditRec.SetSel(nlen+1,nlen); m_ctrlEditRec.ReplaceSel(strDisp); if(strDisp!="ffff") { CString str_modbus[11]; for(i=0;i<11;i++) { str_modbus[i]=strDisp.Mid(i*2,2); } CEdit* pedit=(CEdit*)GetDlgItem(IDC_EDIT_DEVICE); pedit->SetWindowText(str_modbus[0]); CEdit* pedit1=(CEdit*)GetDlgItem(IDC_EDIT_FUNCTION); pedit1->SetWindowText(str_modbus[1]); CEdit* pedit2=(CEdit*)GetDlgItem(IDC_EDIT_FIRST_ADDRESS); pedit2->SetWindowText(str_modbus[2]); CEdit* pedit3=(CEdit*)GetDlgItem(IDC_EDIT_DATA_NUM); pedit3->SetWindowText(str_modbus[3]+str_modbus[4]+" "+str_modbus[5]+str_modbus[6]+" "+str_modbus[7]+str_modbus[8]); CEdit* pedit4=(CEdit*)GetDlgItem(IDC_EDIT_CHECK_CRC); pedit4->SetWindowText(str_modbus[9]+str_modbus[10]); } else { AfxMessageBox("数据发送有误，请重新发送！"); } break; } } }void CSerialmodbusDlg::OnSendButton() { // TODO: Add your control notification handler code here sendbuf(); }void CSerialmodbusDlg::OnTimer(UINT nIDEvent) { // TODO: Add your message handler code here and/or call default //UpdateData(true); //sendbuf(); CDialog::OnTimer(nIDEvent);}void CSerialmodbusDlg::sendbuf(){ unsigned char arr_cmd[] = {0x01,0x03,0x00,0x25,0x00,0x03,0xff,0xff}; //arr_cmd[0] = m_nAddress[m_nCurModule-1]; unsigned short CRC = CRC16(arr_cmd,6); /*arr_cmd[6] = (unsigned char) CRC; arr_cmd[7]= (unsigned char) (CRC >> 8);*/ CString str_cmd(arr_cmd); BSTR bstr_cmd ; bstr_cmd = SysAllocStringByteLen((char*) arr_cmd,8); //分配BSTR资源 TRACE("String len of bstr_cmd =%d\n",SysStringByteLen(bstr_cmd)); VARIANT var; VariantInit(&var); //初始化VARIANT var.vt = VT_BSTR; var.bstrVal = bstr_cmd;//设置BSTR类型和值 m_MSComm.SetNullDiscard(FALSE); //接收时保留NULL字符 CByteArray cba_cmd; //使用CByteArray发送字符(因中有字符NULL-0) for(int i=0;i<8;i++) { cba_cmd.Add(arr_cmd[i]); } m_MSComm.SetOutput(COleVariant(cba_cmd)); SysFreeString(bstr_cmd);}static unsigned char auchCRCHi[] = {0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01,0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01,0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81,0x40} ;static unsigned char auchCRCLo[] = {0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4,0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD,0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7,0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE,0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2,0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB,0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91,0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88,0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80,0x40} ;unsigned short CRC16(unsigned char* puchMsg, unsigned char usDataLen)/* message to calculate CRC upon */ /* quantity of bytes in message */{ unsigned char uchCRCHi = 0xFF ; /* high byte of CRC initialized */ unsigned char uchCRCLo = 0xFF ; /* low byte of CRC initialized */ unsigned uIndex ; /* will index into CRC lookup table */ while (usDataLen--) /* pass through message buffer */ { uIndex = uchCRCHi ^ *puchMsg++ ; /* calculate the CRC *///这几条没看明白 uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex]; uchCRCLo = auchCRCLo[uIndex] ; } *puchMsg++ = uchCRCHi; *puchMsg = uchCRCLo; return (uchCRCHi << 8 | uchCRCLo) ;}BOOL CSerialmodbus2Dlg::OnInitDialog(){ CDialog::OnInitDialog(); m_MSComm.SetCommPort(2);//在设置选项里的port值不能初始时未能传递过来 m_MSComm.SetInputMode(1); m_MSComm.SetInBufferSize(1024); m_MSComm.SetOutBufferSize(512); m_MSComm.SetRThreshold(1); m_MSComm.SetInputLen(0); m_MSComm.SetSettings("9600,n,8,1"); if(!m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(TRUE); else MessageBox("打开串口出错"); m_MSComm.GetInput();//先预读以清除残留数据 return TRUE; // return TRUE unless you set the focus to a control}void CSerialmodbus2Dlg::open_serial(){ if(!m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(TRUE);//打开串口 //应该还有一些后续的操作情形,暂时留待协议能完成之后再行添加}void CSerialmodbus2Dlg::close_serial(){ if(m_MSComm.GetPortOpen()) m_MSComm.SetPortOpen(FALSE);}void CSerialmodbus2Dlg::OnTimer(UINT nIDEvent) { // TODO: Add your message handler code here and/or call default //UpdateData(true);// Combine(m_device, m_funccode,m_faddress,m_datanum); CDialog::OnTimer(nIDEvent);}BEGIN_EVENTSINK_MAP(CSerialmodbus2Dlg, CDialog) //{{AFX_EVENTSINK_MAP(CSerialmodbus2Dlg) ON_EVENT(CSerialmodbus2Dlg, IDC_MSCOMM1, 1 /* OnComm */, OnComm, VTS_NONE) //}}AFX_EVENTSINK_MAPEND_EVENTSINK_MAP()void CSerialmodbus2Dlg::OnComm() { VARIANT variant_inp; COleSafeArray safearray_inp; long length,i; BYTE data[4096]; unsigned char sendback[100]; CString strtemp; CString strDisp; int nEvent=m_MSComm.GetCommEvent(); int k; switch (nEvent)//接收缓冲区内有字符 { case 2: k=m_MSComm.GetInBufferCount(); if(k>0) { variant_inp=m_MSComm.GetInput();//读取缓冲区内的数据 safearray_inp=variant_inp;//将VARIANT型变量转换为ColeSafeArray型变量 length=safearray_inp.GetOneDimSize();//确定数据长度 for(i=0;i<length;i++) safearray_inp.GetElement(&i,data+i);//将数据转换为BYTE型数组 for(i=0;i<length;i++) { BYTE bt=*(char*)(data+i);//字符型 *(sendback+i)=*(char*)(data+i); strtemp.Format("%02X",bt);//将字符送入临时变量strtemp存放 strDisp+=strtemp;//加入接收编辑框对应字符串 } CString str_crc; str_crc.Format("%c%c",sendback[6],sendback[7]); unsigned short CRC = CRC16(sendback,6); CString str_check; str_check.Format("%c%c",sendback[6],sendback[7]); if(str_check==str_crc) { int nlen=m_ctrlEditRec.GetWindowTextLength(); m_ctrlEditRec.SetSel(nlen+1,nlen); m_ctrlEditRec.ReplaceSel(strDisp); CString str_modbus[8]; for(i=0;i<8;i++) { str_modbus[i]=strDisp.Mid(i*2,2); } String2Hex(strDisp,sendback); unsigned char arr_cmd[] = {sendback[0],sendback[1],0x06,0x08,0x2C,0x08,0x2A,0x08,0x2C,0xff,0xff}; sendbuf(arr_cmd); /* CByteArray cba_cmd; //使用CByteArray发送字符(因中有字符NULL-0) for(int i=0;i<11;i++) { cba_cmd.Add(arr_cmd[i]); } m_MSComm.SetOutput(COleVariant(arr_cmd));*/ CEdit* pedit=(CEdit*)GetDlgItem(IDC_EDIT_DEVICE); pedit->SetWindowText(str_modbus[0]); CEdit* pedit1=(CEdit*)GetDlgItem(IDC_EDIT_FUNCTION); pedit1->SetWindowText(str_modbus[1]); CEdit* pedit2=(CEdit*)GetDlgItem(IDC_EDIT_FIRST_ADDRESS); pedit2->SetWindowText(str_modbus[2]+str_modbus[3]); CEdit* pedit3=(CEdit*)GetDlgItem(IDC_EDIT_DATA_NUM); pedit3->SetWindowText(str_modbus[4]+str_modbus[5]); CEdit* pedit4=(CEdit*)GetDlgItem(IDC_EDIT_CHECK_CRC); pedit4->SetWindowText(str_modbus[6]+str_modbus[7]); } else { unsigned char arr_cmd[]={0xff,0xff}; CByteArray cba_cmd; //使用CByteArray发送字符(因中有字符NULL-0) for(int i=0;i<2;i++) { cba_cmd.Add(arr_cmd[i]); } m_MSComm.SetOutput(COleVariant(cba_cmd)); } } break; } }int CSerialmodbus2Dlg::String2Hex(CString str, unsigned char senddata[]){ int hexdata,lowhexdata; int hexdatalen=0; int len=str.GetLength(); //senddata.SetSize(len/2); for(int i=0;i<len;) { char lstr,hstr=str[i]; if(hstr==' ') { i++; continue; } i++; if(i>=len) break; lstr=str[i]; hexdata=ConvertHexChar(hstr); lowhexdata=ConvertHexChar(lstr); if((hexdata==16)||(lowhexdata==16)) break; else hexdata=hexdata*16+lowhexdata; i++; senddata[hexdatalen]=(char)hexdata; hexdatalen++; } //senddata.SetSize(hexdatalen); return hexdatalen;}char CSerialmodbus2Dlg::ConvertHexChar(char ch){ if((ch>='0')&&(ch<='9')) return ch-0x30; else if((ch>='A')&&(ch<='F')) return ch-'A'+10; else if((ch>='a')&&(ch<='f')) return ch-'a'+10; else return (-1);}void CSerialmodbus2Dlg::sendbuf(unsigned char arr_cmd[]){ //unsigned char arr_cmd[] = {0x01,0x03,0x00,0x25,0x00,0x03,0xff,0xff}; unsigned short CRC = CRC16(arr_cmd,9); CString str_cmd(arr_cmd); BSTR bstr_cmd ; bstr_cmd = SysAllocStringByteLen((char*) arr_cmd,11); //分配BSTR资源 TRACE("String len of bstr_cmd =%d\n",SysStringByteLen(bstr_cmd)); VARIANT var; VariantInit(&var); //初始化VARIANT var.vt = VT_BSTR; var.bstrVal = bstr_cmd;//设置BSTR类型和值 m_MSComm.SetNullDiscard(FALSE); //接收时保留NULL字符 CByteArray cba_cmd; //使用CByteArray发送字符(因中有字符NULL-0) for(int i=0;i<11;i++) { cba_cmd.Add(arr_cmd[i]); } m_MSComm.SetOutput(COleVariant(cba_cmd)); SysFreeString(bstr_cmd);} 0 0
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