main.cpp

<<Windows驱动开发技术详解>>随书光盘源码,共23章,开发环境主要是Visual studio.

#include <windows.h>
#include <stdio.h>
//使用CTL_CODE必须加入winioctl.h
#include <winioctl.h>
#include "..\NT_Driver\Ioctls.h"

int main()
{
	HANDLE hDevice = 
		CreateFile("\\\\.\\HelloDDK",
					GENERIC_READ | GENERIC_WRITE,
					0,		// share mode none
					NULL,	// no security
					OPEN_EXISTING,
					FILE_ATTRIBUTE_NORMAL,
					NULL );		// no template

	if (hDevice == INVALID_HANDLE_VALUE)
	{
		printf("Failed to obtain file handle to device: "
			"%s with Win32 error code: %d\n",
			"MyWDMDevice", GetLastError() );
		return 1;
	}

	DWORD dwOutput ;
	DWORD inputBuffer[3] =
	{
		0x378,//对0x378进行操作
		1,//1代表8位操作，2代表16位操作，4代表32位操作
		2//输出字节
	};

	//产生周期是200毫秒的周期信号
	for (;;)
	{
		DeviceIoControl(hDevice, WRITE_PORT, inputBuffer, sizeof(inputBuffer), NULL, 0, &dwOutput, NULL);
		inputBuffer[2] = inputBuffer[2] ^3;//让第0、1位求反
		Sleep(100);//暂停100毫秒
	}

	CloseHandle(hDevice);

	return 0;
}