//
// Ioctl.cpp
//
// RomaNets Software, 2005
//
// Uses: WinNT driver MyExample.sys
// Source: D:\_RNH\_DEV\IBMPC\_DRIVERS\RoPortsDrv\install\MyExample.inf
//
// Write to LPT1 port 0x0378
// Read from LPT1 port 0x0379
//


#include "stdafx.h"
#include <winioctl.h>
#include "Ioctl.h"



///////////////////////////////////////////////////////////////////////////////
int write_driver( UCHAR myByte)
///////////////////////////////////////////////////////////////////////////////
{
	HANDLE hHandle =           // Получаем доступ к драйверу
			CreateFile( "\\\\.\\MyExample",
						GENERIC_READ | GENERIC_WRITE,
						FILE_SHARE_READ | FILE_SHARE_WRITE,
						NULL,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_NORMAL,
						NULL );

	if(hHandle==INVALID_HANDLE_VALUE)
	{
		//printf("ERR: can not access driver Example.sys !\n");
		return (-1);
	}
	DWORD BytesReturned;

	unsigned long ioctlCode;

	ioctlCode=IOCTL_TOUCH_PORT_378H;

	UCHAR InputBuffer = myByte; //0xF;
	ULONG DataLength = 1;

	if( !DeviceIoControl(   hHandle,
					ioctlCode,
					//NULL, 0,  // Input
					&InputBuffer, DataLength,
					NULL, 0,  // Output
					&BytesReturned,
					NULL )  )
	{
		//printf( "Error in IOCTL_TOUCH_PORT_378H!" );
		return(-1);
	}

	CloseHandle(hHandle);



return 0;
}


///////////////////////////////////////////////////////////////////////////////
UCHAR read_driver()
///////////////////////////////////////////////////////////////////////////////
{
	HANDLE hHandle =           // Получаем доступ к драйверу
			CreateFile( "\\\\.\\MyExample",
						GENERIC_READ | GENERIC_WRITE,
						FILE_SHARE_READ | FILE_SHARE_WRITE,
						NULL,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_NORMAL,
						NULL );

	if(hHandle==INVALID_HANDLE_VALUE)
	{
		//printf("ERR: can not access driver Example.sys !\n");
		return (-1);
	}
	DWORD BytesReturned;

	unsigned long ioctlCode;

	UCHAR myByte = 0x00;

	ioctlCode=IOCTL_SEND_BYTE_TO_USER;
	if( !DeviceIoControl(   hHandle,
					ioctlCode,
					NULL, 0,  // Input
					&myByte, sizeof(myByte),// Output
					&BytesReturned,
					NULL )  )
	{
		//printf( "Error in IOCTL_SEND_BYTE_TO_USER!" );
		return(-1);
	}

	CloseHandle(hHandle);

	return myByte;
}