vs2017 c++ 串口收发程序
时间: 2023-07-28 17:07:31 浏览: 56
以下是一个简单的使用C++和Windows API编写的串口收发程序:
```c++
#include <iostream>
#include <Windows.h>
int main()
{
// 打开串口
HANDLE hSerial = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hSerial == INVALID_HANDLE_VALUE)
{
std::cerr << "无法打开串口" << std::endl;
return 1;
}
// 配置串口参数
DCB dcbSerialParams = { 0 };
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (!GetCommState(hSerial, &dcbSerialParams))
{
std::cerr << "无法获取串口参数" << std::endl;
CloseHandle(hSerial);
return 1;
}
dcbSerialParams.BaudRate = CBR_9600;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if (!SetCommState(hSerial, &dcbSerialParams))
{
std::cerr << "无法设置串口参数" << std::endl;
CloseHandle(hSerial);
return 1;
}
// 配置串口缓冲区
COMMTIMEOUTS timeouts = { 0 };
timeouts.ReadIntervalTimeout = 50;
timeouts.ReadTotalTimeoutConstant = 50;
timeouts.ReadTotalTimeoutMultiplier = 10;
timeouts.WriteTotalTimeoutConstant = 50;
timeouts.WriteTotalTimeoutMultiplier = 10;
if (!SetCommTimeouts(hSerial, &timeouts))
{
std::cerr << "无法设置串口缓冲区" << std::endl;
CloseHandle(hSerial);
return 1;
}
// 发送数据
DWORD bytesWritten = 0;
char data[] = "Hello, world!";
if (!WriteFile(hSerial, data, sizeof(data), &bytesWritten, NULL))
{
std::cerr << "无法发送数据" << std::endl;
CloseHandle(hSerial);
return 1;
}
// 接收数据
DWORD bytesRead = 0;
char buffer[1024] = { 0 };
if (!ReadFile(hSerial, buffer, sizeof(buffer), &bytesRead, NULL))
{
std::cerr << "无法接收数据" << std::endl;
CloseHandle(hSerial);
return 1;
}
std::cout << "接收到的数据: " << buffer << std::endl;
// 关闭串口
CloseHandle(hSerial);
return 0;
}
```
其中,`hSerial`是打开的串口句柄,可以通过指定串口号(例如`COM1`)来打开串口;`dcbSerialParams`是串口参数的结构体,可以通过`GetCommState`和`SetCommState`函数来获取和设置;`timeouts`是串口缓冲区的结构体,可以通过`SetCommTimeouts`函数来设置;`WriteFile`和`ReadFile`函数分别用于发送和接收数据。
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