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" 1
物理串口就可以直接写串口号，比如物理串口6：
char portName[] = "COM6" 1
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; }
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283测试可以成功收发，绑定的对应串口收到数据：
