【C工具】【串口助手】C语言操作虚拟串口和物理串口-编程知识

【C工具】【串口助手】C语言操作虚拟串口和物理串口

虚拟串口基础读写例子，记录备忘
环境：win10 + mingw64

操作虚拟串口和物理串口的区别只是串口名称不同，需要用个奇怪的写法，比如虚拟串口号为21：

char portName[] = "\\\\.\\COM21"

物理串口就可以直接写串口号，比如物理串口6：

char portName[] = "COM6"

不区分大小写，下面是一个示例程序：

#include <stdio.h>
#include <windows.h>int main(int argc, char *argv[]) {HANDLE hSerial;DCB dcbSerialParams = {0};COMMTIMEOUTS timeouts = {0};//char portName[] = "COM6";       // 物理串口的设备路径，根据实际情况修改char portName[] = "\\\\.\\COM21"; // 虚拟串口的设备路径，根据实际情况修改char data[] = "Hello, Serial!"; // 待发送的数据// 打开串口hSerial = CreateFile(portName,GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);if (hSerial == INVALID_HANDLE_VALUE){printf("Failed to open serial port\n");return 1;}// 配置串口参数dcbSerialParams.DCBlength = sizeof(dcbSerialParams);if (!GetCommState(hSerial, &dcbSerialParams)){printf("Failed to get current serial parameters\n");CloseHandle(hSerial);return 1;}dcbSerialParams.BaudRate = CBR_115200; // 波特率dcbSerialParams.ByteSize = 8; // 数据位数dcbSerialParams.StopBits = ONESTOPBIT; // 停止位dcbSerialParams.Parity = NOPARITY; // 校验位if (!SetCommState(hSerial, &dcbSerialParams)){printf("Failed to set serial parameters\n");CloseHandle(hSerial);return 1;}// 配置读取超时timeouts.ReadIntervalTimeout = 50;timeouts.ReadTotalTimeoutConstant = 50;timeouts.ReadTotalTimeoutMultiplier = 10;timeouts.WriteTotalTimeoutConstant = 50;timeouts.WriteTotalTimeoutMultiplier = 10;if (!SetCommTimeouts(hSerial, &timeouts)){printf("Failed to set serial timeouts\n");CloseHandle(hSerial);return 1;}// 发送数据DWORD bytesWritten;if (!WriteFile(hSerial, data, sizeof(data), &bytesWritten, NULL)){printf("Failed to write to serial port\n");CloseHandle(hSerial);return 1;}printf("Sent %d bytes\n", bytesWritten);// 读取数据DWORD bytesRead;char buffer[256];if (!ReadFile(hSerial, buffer, sizeof(buffer), &bytesRead, NULL)){printf("Failed to read from serial port\n");CloseHandle(hSerial);return 1;}printf("Received %d bytes: %s\n", bytesRead, buffer);// 关闭串口CloseHandle(hSerial);return 0;
}