boost-串口通信
备忘使用。
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- #include
- #include
- #include
- using boost::asio::io_service;
- using boost::system::error_code;
- using boost::asio::serial_port;
- using boost::asio::deadline_timer;
- using boost::asio::buffer;
- class MyCom
- {
- public:
- MyCom(void)
- {
- _pSerialPort= new serial_port(_ios);
- _pTimer = new deadline_timer(_ios);
- }
- ~MyCom(void)
- {
- if (_pTimer != NULL)
- {
- delete _pTimer;
- _pTimer = NULL;
- }
- if (_pSerialPort != NULL)
- {
- delete _pSerialPort;
- _pSerialPort = NULL;
- }
- }
- void Open(const string& comName);
- {
- _pSerialPort->open(comName);
- _pSerialPort->set_option(serial_port::flow_control(serial_port::flow_control::none)); //流量控制为none
- _pSerialPort->set_option(serial_port::parity(serial_port::parity::none)); //奇偶检验为none
- _pSerialPort->set_option(serial_port::stop_bits(serial_port::stop_bits::one)); //停止位为1
- _pSerialPort->set_option(serial_port::character_size(8)); //字符大小(数据位)为8
- _pSerialPort->set_option(serial_port::baud_rate(115200));//波特率
- }
- void Send(const string& data)
- {//同步发数据
- _mutex.lock();
- _pSerialPort->write_some(buffer(data, data.size()));
- _mutex.unlock();
- }
- string Recv()
- {//异步收数据
- _mutex.lock();
- memset(_buf, 0, sizeof(_buf));
- _pSerialPort->async_read_some(buffer(_buf, 256),
- boost::bind(&MyCom::RecvHandle, this,
- boost::asio::placeholders::error,//传送错误码
- boost::asio::placeholders::bytes_transferred//传送字节数
- ));
- _mutex.unlock();
- _pTimer->expires_from_now(boost::posix_time::millisec(SLEEP_TIME));
- _pTimer->async_wait(boost::bind(&serial_port::cancel, _pSerialPort));
- _ios.run();//异步情况下使用词句才开始执行
- _ios.reset();//还原状态
- return string(_buf, _ret);
- }
- void Close()
- {
- _mutex.lock();
- if (_pSerialPort->is_open())
- _pSerialPort->close();
- _mutex.unlock();
- }
- protected:
- void RecvHandle(const error_code& error, size_t bytes_transferred)
- {
- if (!error)
- _pTimer->cancel();//没有错误就结束定时器
- _ret = bytes_transferred;
- }
- private:
- boost::asio::io_service _ios;
- serial_port* _pSerialPort;
- deadline_timer* _pTimer;
- char _buf[256];
- size_t _ret;
- boost::mutex _mutex;
- };
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