Operation of hardware ports under Windows---the use of Winio libraries

This article refers to an article on the Internet "VC 2010 under Winio 3.0 Direct Access I/O port";

Due to the kernel protection mechanism of windows, we cannot directly manipulate the hardware through the kernel, by using Winio, we can bypass this limitation and implement direct operation to the Windows hardware port or address. In practice, it is found that the Winio Library can operate on both normal I/O ports and Gpio.

There is a lot of reference on the Winio content network, which only records my own problems (points to note in the use):

You need to add a digital signature to the Winio.sys driver file under 1.64-bit operating systems.

2. Note the storage path of the two files for Winio.sys and WinIo.dll, which will cause the initialization to fail if the path is not correct.

3. Download down the Winio file has a DLL folder, if the failure to find initialization, we can break point tracking into the DLL to see where the problem. For example, when I use the win8.1 to find initialization failure, follow-up to find that the OpenSCManager () function returned false, is due to win8.1 user rights settings, by looking for the registry location of the response to initialize successfully (refer to the solution on the Internet).

4. Before using the Winio function we need to know which port to operate on, or the address location.

5. The DLL needs to be compiled based on the version of the response (32-bit/64-bit).

6. The operation Port needs to call the Getportval ()/setportval () function, and the Getphylong ()/setphylong () function should be called if the specific physical address is operational

Here is an example of a simple

1 //WinIoDemo.cpp: Defines the entry point of the console application.
4#include"stdafx.h"5#include <Windows.h>6#include <iostream>7#include"winio.h"8#include <conio.h>9#include"gpio_dll.h"Ten using namespacestd; One  A #defineGpio_port 0xfed10000//assumed a specific object address - int_tmain (intARGC, _tchar*argv[]) - { +     BOOLBresult; -  +Bresult =Initializewinio (); A  at     if(!bresult) -     { -cout<<"error to initialize Winio ..."<<Endl; -  -         return-1; -     } in     Else -     { +UnsignedLongVal;
 -UnsignedLongData;
 theGetphyslong ((pbyte) gpio_port,&val);
 *printf"Current Value:%4x \ n", Val); $     +Data = Val |0x02; Setting the Bit1 $  $printf"Current Value:%4x \ n", Data); -  -         BOOLBR =Setphyslong ((pbyte) gpio_port,data); the  the Shutdownwinio (); the     } theprintf"\npress AnyKey to continue ...");
 the _getch ();
 -     return 0; in}

Operation of hardware ports under Windows---the use of Winio libraries