USB转串口：设备无法打开

[nono_bill]

我的机器上没有串口，用现在上面接的是两个USB转串口线（装好驱动后，设备管理器里显示的是COM11和COM13）。之前我用两个USB转串口线对接起来，两头用超级终端收发数据正常。现在我写了如下代码测试打开串口：

#include <Windows.h>
#include <cstdio>

int main()
{
    HANDLE hd = CreateFileA ("COM13", 
        GENERIC_READ | GENERIC_WRITE,
        0,
        0,
        OPEN_EXISTING,
        FILE_FLAG_OVERLAPPED,
        0);

    if (hd == INVALID_HANDLE_VALUE) {
        fprintf (stderr, "COM13: %d\n", GetLastError() );
        return -1;
    }
    else {
        fprintf (stdout, "COM13: open device successfully.\n");
    }

	return 0;
}

结果显示，串口打开
失败，错误ID是：ERROR_FILE_NOT_FOUND。初次编写串口程序，不知道什么原因，请各位指点。先行谢过。

[nono_bill]

原因已找到。

http://www.advancedvirtualcomport.com/faq.html

How do I open a virtual serial port with a number higher than 9 from my application?
Windows automatically maps COM1-COM9 ports to the right device name. COM ports with higher numbers should be opened as \\.\COMxxx, where xxx is a port number.

Example for C/C++/C#:
hPort = CreateFile("\\\\.\\COM15", ...);

Example for VB:
hPort = CreateFile("\\.\COM15", ...);

Example for Delphi:
hPort := CreateFile('\\.\COM15', ...);

[nono_bill]

原因已找到。

http://www.advancedvirtualcomport.com/faq.html

How do I open a virtual serial port with a number higher than 9 from my application?
Windows automatically maps COM1-COM9 ports to the right device name. COM ports with higher numbers should be opened as \\.\COMxxx, where xxx is a port number.

Example for C/C++/C#:
hPort = CreateFile("\\\\.\\COM15", ...);

Example for VB:
hPort = CreateFile("\\.\COM15", ...);

Example for Delphi:
hPort := CreateFile('\\.\COM15', ...);

[xianzi123]

学习了，原来大于10的串口号要这样写啊！

[尹成]

学习LZ了，有探索精神，顶上！~

[Python]

学习了~~~