还想问一下：什么原因会导致从串口读到的数据在视图中显示越来越慢？！

[xyshine]

还有，从写命令到串口到串口收到回应大概需要多长时间，我每隔100毫秒读一次够吗？

[xyshine]

以下是我的通信程序，有问题吗？

void CMainFrame::OnTimer(UINT nIDEvent)
{
DWORD readnum=Communication();
if(readnum==0)
{
iLinkCount++;
if(iLinkCount==50)
{
KillTimer(timeID);
UINT ooo=this->MessageBox("RS232 ERROR","´íÎó",MB_RETRYCANCEL|MB_ICONSTOP);
if(ooo==IDRETRY)
timeID=SetTimer(3,100,NULL);

iLinkCount=0;

}

return;
}

iLinkCount=0;
byte mCheck=0;
for(int i=0;i<=m_Count;i++)
{
mCheck+=inbuff[i];
}
if(mCheck!=0xFF)
return;
m_Count=inbuff[0];
UpdateWindow();
switch(m_Count)
{
case 0x01: LinkResult();break;
case 0x2e: LPUCheck();break;
case 0x3e: LPUCheck();break;
case 0xE1: wait();break;
case 0x13: {SelfCheck();break;
case 0x46: MFDWrongCheck();break;
case 0x52: RoundKey();break;
case 0x61: VideoFold();break;
case 0x71: MFDFixCheck();break;
case 0xf2: Wrong();break;
default: return;
}

CFrameWnd::OnTimer(nIDEvent);
}




int CMainFrame::Communication()
{
for(int i=0;i<15;i++)
inbuff[i]=0;

DWORD nBytesRead,nBytesWrite;
p_outbuff=&outbuff[0];
if(!WriteFile(handle,p_outbuff,3,&nBytesWrite,NULL))
{
nBytesWrite=0;
return 0;
}
if(nBytesWrite!=3)
return 0;

p_inbuff=&inbuff[0];
if(!ReadFile(handle,p_inbuff,1,&nBytesRead,NULL))
{
nBytesRead=0;
return 0;
}

if(nBytesRead==0)
return 0;
m_Count=inbuff[0];
m_Count&=0x0F;
p_inbuff++;
if(!m_Count)
return true;

if(!ReadFile(handle,p_inbuff,m_Count,&nBytesRead,NULL))
{
nBytesRead=0;
return 0;
}
if(nBytesRead!=m_Count)
{
return 0;
}

//PurgeComm(handle,PURGE_RXCLEAR);
return true;
}

[zzzjjhh]

你可以不停的收啊，用事件激活