程序分为两个部分
/* MySerialPort
h 封装了串口通讯的windows API
支持异步操作串口
*/ #pragma once #include namespace jeff_class { class CMySerialPort { public: CMySerialPort(); ~CMySerialPort(); BOOL Open ( int nPort = 2, int nBaud = 9600 ); BOOL Close ( void ); int ReadData ( void *, int ); int SendData ( const char *, int ); int ReadDataWaiting ( void ); // 查询缓冲区内是否有未读取的数据 BOOL IsOpened ( void ) { return ( m_bOpened ); } protected: BOOL WriteCommByte ( unsigned char ); // 内部实现，向串口写数据 HANDLE m_hIDComDev; OVERLAPPED m_OverlappedRead, m_OverlappedWrite; BOOL m_bOpened; }; } / ****MySerialPort
cpp***********/ #include "MySerialPort
h" #include // 不使用读超时 #define TIMEOUT_READ_INTERVAL 0xFFFFFFFF #define TIMEOUT_READ_TOTAL_MULTIPLIER 0 #define TIMEOUT_READ_TOTAL_CONSTANT 0 // 写超时为秒 #define TIMEOUT_WRITE_TOTAL_MULTIPL
