C＆＃x2B;＆＃x2B;将数据发送到WinXP中的并行端口

发布于 2025-01-29 14:23:00 字数 636 浏览 2 评论 0原文

我想在WinxP系统中使用C ++发送标记到并行端口。我检查了信息并编写了以下代码：

HANDLE parallelPort = CreateFile(L"LPT1", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if(parallelPort == INVALID_HANDLE_VALUE)
    std::cout << "handle error" << std::endl;

int *data = new int[1];
data[0] = 4;
WriteFile(parallelPort, data, sizeof(int), NULL, NULL);


std::cout << "send success!" << std::endl;

CloseHandle(parallelPort);

我运行此代码，查找parallelport！= invalid_handle_value。但是它不会打印发送成功！。此代码有什么问题？
如果您使用的是名为“ E-Prime”的软件，那么我想做的事情与此相同：

WritePort &H378, 0

原文

I want to send mark to parallel port using C++ in winXP system. I checked the information and wrote the following code:

HANDLE parallelPort = CreateFile(L"LPT1", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if(parallelPort == INVALID_HANDLE_VALUE)
    std::cout << "handle error" << std::endl;

int *data = new int[1];
data[0] = 4;
WriteFile(parallelPort, data, sizeof(int), NULL, NULL);


std::cout << "send success!" << std::endl;

CloseHandle(parallelPort);

I run this code, find parallelPort != INVALID_HANDLE_VALUE. But it doesn't print send success!. What's wrong with this code？
If you have used the software named "E-prime", I want to do the same as it: