发送数据给串口 cpp代码实现
时间: 2023-08-06 12:21:05 浏览: 43
以下是C++代码示例,用于向串口发送数据:
```c++
#include <iostream>
#include <windows.h>
int main()
{
HANDLE hSerial;
DCB dcbSerialParams = { 0 };
COMMTIMEOUTS timeouts = { 0 };
DWORD bytes_written;
// 打开串口
hSerial = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
// 配置串口参数
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (!GetCommState(hSerial, &dcbSerialParams))
{
std::cout << "Error getting device state\n";
CloseHandle(hSerial);
return 1;
}
dcbSerialParams.BaudRate = CBR_9600;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if (!SetCommState(hSerial, &dcbSerialParams))
{
std::cout << "Error setting device parameters\n";
CloseHandle(hSerial);
return 1;
}
// 设置超时
timeouts.ReadIntervalTimeout = 50;
timeouts.ReadTotalTimeoutConstant = 50;
timeouts.ReadTotalTimeoutMultiplier = 10;
timeouts.WriteTotalTimeoutConstant = 50;
timeouts.WriteTotalTimeoutMultiplier = 10;
if (!SetCommTimeouts(hSerial, &timeouts))
{
std::cout << "Error setting timeouts\n";
CloseHandle(hSerial);
return 1;
}
// 发送数据
char* data = "Hello, world!";
if (!WriteFile(hSerial, data, strlen(data), &bytes_written, NULL))
{
std::cout << "Error writing to device\n";
CloseHandle(hSerial);
return 1;
}
// 关闭串口
CloseHandle(hSerial);
return 0;
}
```
请将“COM1”替换为您要连接的串口名称(例如“COM2”、“COM3”等),并根据需要更改波特率、数据位、停止位和奇偶校验位等串口参数。
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