d050.bmp.txt

Visual C++通信编程实例

OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL I FILE_FLAG_OVERLAPPED，，，重叠方式
NULL);
if(m_hCom==INVALID_HANDLE_VALUE)
    .   return FALSE;
S etupComm(m_hCom,MAXBLOCK,MAXBLOCK) ;
 S etCommMask(m_hCom,  EV_RXCHAR);
／／把间隔超时设为最大，把总超时设为0将导致ReadFile立即返回并完成操作
TimeOuts.ReadIntervalTimeout=MAXDWORD;
TimeOuts.ReadTotaITimeoutMultiplier=0;
TimeOuts.ReadTotalTimeoutConstant=0;
产设置写超时以指定WriteComm成员函数中的GetOverlappedResult函数的等待时间8／
TimeOuts.WriteTotalTimeoutMultipliep50;
TimeOuts.WriteTotalTimeoutConstant=2000;
S etCommTimeouts(m_hCom,  &TimeOuts);
if(ConfigConnection0)
{
    m_pThread=AfxBeginThread(CommProc. this, THREAD_PRIORITY_NORMAL,
    0，CREATE_SUSPENDED, NULL);，，创建并挂起线程
    if(m_pThread==NULL)
    {
    CloseHandle(m_hCom);
    retum FALSE;
    l
    else
    {
    m bConnected=TRUE;
    m_pThread->ResumeThread();，／恢复线程运行
    }
)
else
{
    CloseHandle(m_hCom);
    return FALSE;
l
 retum TRUE;
2)配置串口连接函数ConfigConnection0。
50
BOOL CTermDoc::ConfigConnection()
 {
       DCB dcb;