串口编程里COMSTAT结构

COMSTAT结构

COMSTAT结构包含串口的信息，结构定义如下：

typedef struct _COMSTAT { // cst

    DWORD fCtsHold : 1;   // Tx waiting for CTS signal

    DWORD fDsrHold : 1;   // Tx waiting for DSR signal

    DWORD fRlsdHold : 1;  // Tx waiting for RLSD signal

    DWORD fXoffHold : 1;  // Tx waiting, XOFF char rec''d

    DWORD fXoffSent : 1;  // Tx waiting, XOFF char sent

    DWORD fEof : 1;       // EOF character sent

    DWORD fTxim : 1;      // character waiting for Tx

    DWORD fReserved : 25; // reserved

    DWORD cbInQue;        // bytes in input buffer该成员变量的值代表输入缓冲区的字节数

    DWORD cbOutQue;       // bytes in output buffer

} COMSTAT, *LPCOMSTAT;