C++串口信息拦截demo
时间: 2023-08-12 12:33:16 浏览: 75
以下是一个简单的C++串口信息拦截demo,使用了Windows API中的一些函数:
```c++
#include <iostream>
#include <Windows.h>
int main()
{
HANDLE hComm;
char portName[] = "COM1";
DCB dcbSerialParams = { 0 };
COMMTIMEOUTS timeouts = { 0 };
// 打开串口
hComm = CreateFile(portName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hComm == INVALID_HANDLE_VALUE)
{
std::cout << "Failed to open port." << std::endl;
return 1;
}
// 设置串口参数
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (!GetCommState(hComm, &dcbSerialParams))
{
std::cout << "Failed to get current serial parameters." << std::endl;
return 1;
}
dcbSerialParams.BaudRate = CBR_9600;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if (!SetCommState(hComm, &dcbSerialParams))
{
std::cout << "Failed to set serial parameters." << std::endl;
return 1;
}
// 设置串口超时时间
timeouts.ReadIntervalTimeout = 50;
timeouts.ReadTotalTimeoutConstant = 50;
timeouts.ReadTotalTimeoutMultiplier = 10;
timeouts.WriteTotalTimeoutConstant = 50;
timeouts.WriteTotalTimeoutMultiplier = 10;
if (!SetCommTimeouts(hComm, &timeouts))
{
std::cout << "Failed to set serial timeouts." << std::endl;
return 1;
}
// 读取串口数据
DWORD bytesRead;
char buffer[1024];
while (true)
{
if (ReadFile(hComm, buffer, sizeof(buffer), &bytesRead, NULL))
{
std::cout << "Received data: " << buffer << std::endl;
}
else
{
std::cout << "Failed to read from port." << std::endl;
break;
}
}
// 关闭串口
CloseHandle(hComm);
return 0;
}
```
该demo首先通过CreateFile函数打开COM1串口,然后使用GetCommState和SetCommState函数设置串口参数,包括波特率、数据位、停止位和校验位等。接下来使用SetCommTimeouts函数设置串口读写的超时时间。最后在一个while循环中使用ReadFile函数读取串口数据,并将数据打印到控制台上。当无法从串口读取数据时,退出循环并关闭串口。