Asio library for C++

1 Introduction

Asio is a cross-platform C++ library, commonly used for network programming, low-level I/O programming, etc. (low-level I/O). Its structural framework As follows:

2 Using Asio

##2.1 Download

2.2 Configuration

ASIO_STANDALONEIn the non-Boost version,

INCLUDEPATH += $$PWD/../../serialport/asio-1.10.8/includeDEFINES += ASIO_STANDALONE

ASIO_STANDALONEis configured as follows Shown:

2.3 Code example

Create Serial port-->Configuration parameters-->Read and write data-->Enable event loop

#include #include "asio.hpp"#include using namespace asio;// 存储接收到的数据char kBuf[16];// 声明回调函数void PrintBuf();int main() { // 串口 COM1 io_service iosev; serial_port port(iosev, "COM1"); // 参数设置：波特率、流控、奇偶校验、停止位、数据位 port.set_option(serial_port::baud_rate(115200)); port.set_option(serial_port::flow_control(serial_port::flow_control::none)); port.set_option(serial_port::parity(serial_port::parity::none)); port.set_option(serial_port::stop_bits(serial_port::stop_bits::one)); port.set_option(serial_port::character_size(8)); // 向串口写数据 write(port, buffer("Hello Asio", 16)); // 从串口读数据（异步） port.async_read_some(buffer(kBuf),std::bind(PrintBuf)); // 开启事件循环 iosev.run(); }// 打印接收的数据void PrintBuf() { qDebug() << kBuf; }

3 DB9 serial port

to the serial port COM1,"Hello Asio" data, and then go toto receive/readdata. For a serial port, the data will not be received.

short pin 2 and pin 3 before running the program. In this way, you can both send and receive data

4 Virtual serial port

USB to serial portdata cable and install the corresponding driver, then you can communicate with the device with a serial port;

Virtual Serial PortSoftware to create a virtual serial port, for example, Configure Virtual Serial Port Driver

Serial Port Debugging Tool, you can flexibly Debugging the serial port program

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