用MSCOMM控件做上位机的收发问题

[QxiaoQQ]

刚刚学习上位机编程，用MSCOMM控件做了一个上位机，用定时器每个100MS发送数据00 55 ba 00 ff 45 每隔100MS发送00 55 fb。
用usb转串口自发自收，收到的应该是55 fb 00 55 ba 00 ff 45 00。但收到的数据是变的，而且会有重复的，像收到很多ba。求大神帮忙看看代码。

void PASCAL CallBackFunc(UINT wTimerID, UINT msg,DWORD dwUser,DWORD dwl,DWORD dw2) 
{
	CLinMasterNodeTestDlg* dlg = (CLinMasterNodeTestDlg*)dwUser;

	if(!dlg->m_mscomm.GetPortOpen())
    {
        if(NOTopenCOMflagonce==0)
		{
			NOTopenCOMflagonce=1;
		    
		}
		return; 
	} 
	if(stream==0)
	{
		
           dlg->m_mscomm.SetBreak(1);
		   
		stream=1;
	}
	else if(stream==1)
	{
            


		if(dlg->m_Frei.GetCheck())
		{
			LIN_txdata1|=1<<1;
		}
		else
		{
            LIN_txdata1&=~(1<<1);
		}
		if(dlg->m_Autark.GetCheck())
		{
			LIN_txdata1|=1<<0;
		}
		else
		{
            LIN_txdata1&=~(1<<0);
		}
		if(dlg->m_Vorw.GetCheck())
		{
			LIN_txdata1|=1<<2;
		}
		else
		{
            LIN_txdata1&=~(1<<2);
		}
		dlg->m_mscomm.SetBreak(0);
        CByteArray array2;
       
		static int x=0;
		x++;
		if(x&1)
		{
			
			array2.SetSize(5);
			array2.SetAt(0,0x55);
			T_u8 PIDresult=0;
			PIDresult=IDconvertPID(58);  
			array2.SetAt(1,PIDresult);
			array2.SetAt(2,LIN_txdata1);
			array2.SetAt(3,Send59dataarray[1]);
			Send59dataarray[0]=LIN_txdata1;
			T_u8 Enhancecheksum1=0;
			Enhancecheksum1=EnhancedChecksum(Send59dataarray,2,PIDresult);
			array2.SetAt(4,Enhancecheksum1);
			dlg->m_mscomm.SetOutput(COleVariant(array2));
		}
		else
		{
			//dlg->m_mscomm.SetOutBufferCount(0);
			array2.SetSize(2);
			array2.SetAt(0,0x55);
			T_u8 PIDresult1=0;
		    PIDresult1=IDconvertPID(59);  
			array2.SetAt(1,PIDresult1);
			dlg->m_mscomm.SetOutput(COleVariant(array2));
			Requestflag=1;
		}

	   		
		delay=100;
		stream=2;
	}

	else if(stream==2)
	{
		if(delay)
			delay--;
		else
		{
			stream=0;
		    //while(dlg->m_mscomm.GetOutBufferCount()>5);
			//dlg->m_mscomm.SetSettings("19200,n,8,1");
              //delay=100;
		}   
	}
   
}
void CLinMasterNodeTestDlg::OnComm() 
{
	// TODO: Add your control notification handler code here
	VARIANT variant_inp;
	COleSafeArray safearray_inp;
	LONG len,k;
    unsigned char rxdata[30]; //设置BYTE数组An 8-bit integerthat is not signed.
	CString strtemp;
    CString recd;
	int arayindextemp=0;
    static char recordlength=0;
	//static char streamRx=0;
	unsigned char rxarray[30];
//	int rxdindex=0;
//	int rxaindex=0;
//	bool flag=0;

	switch(m_mscomm.GetCommEvent())
	{
		case 1: // comEvSend发送数据
		    break;
		case 2: // comEvReceive读取数据
			{
			// MessageBox(_T("读取数据事件"), _T("TRACE"), MB_OK);
				
				variant_inp=m_mscomm.GetInput(); //读缓冲区
				safearray_inp=variant_inp; //VARIANT型变量转换为COleSafeArray型变量
				len=safearray_inp.GetOneDimSize(); //得到有效数据长度
				// 接受数据

				//m_www=len;
				//UpdateData(0);
				for(k=0;k<len;k++) 
				{
					//unsigned char Hexchange=0;
					safearray_inp.GetElement(&k,rxarray+k); //转换为BYTE型数组
				}
			       if(Requestflag==1)
				{
					if(recordlength<9)
					{
						int templength=recordlength+len;
						for(long u16=recordlength;u16<templength;u16++)
						{
							//safearray_inp.GetElement(&u16,rxarray+u16); //转换为BYTE型数组
							aray[u16]=*(unsigned char*)(rxarray+(u16-recordlength));
							recordlength++;
                                             		Watchstr.Format(_T("%02x"),aray[u16]); //十六进制显示
					
                                                         Watchstrun+=Watchstr;

							Watchstrun+=" ";

					}
	}
					else
					{
						Requestflag=0;
                        m_qqqq=Watchstrun;
                        UpdateData(0);
                        Watchstrun=" ";
						recordlength=0;


					}


			}
				break;
			}

[McuPlayer]

用原生串口试试看 USB设备，本身是bulk方式的，小数据，多频次，的情况下，效率很低，丢数据也有可能

[farfrome]

void CTabPage1::readComm2(CByteArray& arr) { if(h_mscomm1.get_PortOpen()){ if(h_mscomm1.get_InBufferCount()>0) { h_mscomm1.put_InputMode(1); //二进制模式输入 VARIANT var1; COleSafeArray arr1; var1=h_mscomm1.get_Input(); arr1=var1; DWORD len=arr1.GetOneDimSize(); long i=0; for(;i<len;i++) { BYTE byte_1; arr1.GetElement(&i,&byte_1); arr.Add(byte_1); } h_mscomm1.put_InBufferCount(0); //清空接收缓冲区 } } } CString CTabPage1::readComm() { CString str1=_T(""); if(h_mscomm1.get_PortOpen()){ if(h_mscomm1.get_InBufferCount()>0) { h_mscomm1.put_InputMode(0); //文本模式输入 VARIANT val=h_mscomm1.get_Input(); str1=val.bstrVal; h_mscomm1.put_InBufferCount(0); //清空接收缓冲区 } } return str1; } void CTabPage1::writeComm(CByteArray& arr) { if(h_mscomm1.get_PortOpen()){ h_mscomm1.put_OutBufferCount(0); //清空发送缓冲区 h_mscomm1.put_InputMode(1); h_mscomm1.put_Output(COleVariant(arr)); } } void CTabPage1::writeComm(CString str) { if(h_mscomm1.get_PortOpen()){ h_mscomm1.put_OutBufferCount(0); //清空发送缓冲区 h_mscomm1.put_Output(COleVariant(str)); } }