C# LPT inpout32.dll答案

【问题标题】：C# LPT inpout32.dllC# LPT inpout32.dll
【发布时间】：2011-01-05 18:43:03
【问题描述】：

我没有收到任何错误或异常。

一个窗口中的按钮：

private void button1_Click(object sender, EventArgs e)
{
    ControlPort.Output(0x378, 0xff);
}

和inpout.dll接口：

class ControlPort
{
    [DllImport("inpout32.dll", EntryPoint = "Out32")]
    public static extern void Output(int adress, int value);
}

怎么了？ D2 上的 LED 一直亮。

我有 Windows 7 x64 Ultimate。

【问题讨论】：

标签： c# .net parallel-port lpt

【解决方案1】：

对于 x64，您应该使用“InpOutx64.dll”。

访问：http://www.highrez.co.uk/Downloads/InpOut32/default.htm 在那里您可以阅读更多内容并找到示例。

【讨论】：

【解决方案2】：

如果有人需要，可以使用代码。

 using System;
using System.Runtime.InteropServices;

namespace ParallelPort
{
    public class PortAccess
    {
        //inpout.dll

        [DllImport("inpout32.dll")]
        private static extern UInt32 IsInpOutDriverOpen();

        [DllImport("inpout32.dll")]
        private static extern void Out32(short PortAddress, short Data);

        [DllImport("inpout32.dll")]
        private static extern char Inp32(short PortAddress);

        [DllImport("inpout32.dll")]
        private static extern void DlPortWritePortUshort(short PortAddress, ushort Data);

        [DllImport("inpout32.dll")]
        private static extern ushort DlPortReadPortUshort(short PortAddress);

        [DllImport("inpout32.dll")]
        private static extern void DlPortWritePortUlong(int PortAddress, uint Data);

        [DllImport("inpout32.dll")]
        private static extern uint DlPortReadPortUlong(int PortAddress);

        [DllImport("inpoutx64.dll")]
        private static extern bool GetPhysLong(ref int PortAddress, ref uint Data);

        [DllImport("inpoutx64.dll")]
        private static extern bool SetPhysLong(ref int PortAddress, ref uint Data);

        //inpoutx64.dll

        [DllImport("inpoutx64.dll", EntryPoint = "IsInpOutDriverOpen")]
        private static extern UInt32 IsInpOutDriverOpen_x64();

        [DllImport("inpoutx64.dll", EntryPoint = "Out32")]
        private static extern void Out32_x64(short PortAddress, short Data);

        [DllImport("inpoutx64.dll", EntryPoint = "Inp32")]
        private static extern char Inp32_x64(short PortAddress);

        [DllImport("inpoutx64.dll", EntryPoint = "DlPortWritePortUshort")]
        private static extern void DlPortWritePortUshort_x64(short PortAddress, ushort Data);

        [DllImport("inpoutx64.dll", EntryPoint = "DlPortReadPortUshort")]
        private static extern ushort DlPortReadPortUshort_x64(short PortAddress);

        [DllImport("inpoutx64.dll", EntryPoint = "DlPortWritePortUlong")]
        private static extern void DlPortWritePortUlong_x64(int PortAddress, uint Data);

        [DllImport("inpoutx64.dll", EntryPoint = "DlPortReadPortUlong")]
        private static extern uint DlPortReadPortUlong_x64(int PortAddress);

        [DllImport("inpoutx64.dll", EntryPoint = "GetPhysLong")]
        private static extern bool GetPhysLong_x64(ref int PortAddress, ref uint Data);

        [DllImport("inpoutx64.dll", EntryPoint = "SetPhysLong")]
        private static extern bool SetPhysLong_x64(ref int PortAddress, ref uint Data);

        private bool _X64;
        private short _PortAddress;

        public PortAccess(short PortAddress)
        {
            _X64 = false;
            _PortAddress = PortAddress;

            try
            {
                uint nResult = 0;
                try
                {
                    nResult = IsInpOutDriverOpen();
                }
                catch (BadImageFormatException)
                {
                    nResult = IsInpOutDriverOpen_x64();
                    if (nResult != 0)
                        _X64 = true;

                }

                if (nResult == 0)
                {
                    throw new ArgumentException("Unable to open InpOut32 driver");
                }
            }
            catch (DllNotFoundException)
            {
                throw new ArgumentException("Unable to find InpOut32.dll");
            }
        }

        //Public Methods
        public void Write(short Data)
        {
            if (_X64)
            {
                Out32_x64(_PortAddress, Data);
            }
            else
            {
                Out32(_PortAddress, Data);
            }
        }

        public byte Read()
        {
            if (_X64)
            {
                return (byte)Inp32_x64(_PortAddress);
            }
            else
            {
                return (byte)Inp32(_PortAddress);
            }
        }
    }
}

【讨论】：

我在尝试拨打 IsInpOutDriverOpen_x64() 时收到 System.EntryPointNotFoundException: Unable to find an entry point named 'IsInpOutDriverOpen' in DLL 'inpoutx64.dll'.。
现在他们有了这个BOOL _stdcall IsXP64Bit(); //Returns TRUE if the OS is 64bit (x64) Windows.，它是两个dll文件的一部分。

【解决方案3】：

当你弄错时，你不会得到异常，最多是蓝屏。选择以下之一：

您使用了错误的地址（0x3bc，0x2f8）
您的 LED 接线错误
你为了获取硬件而闯入了错误的博物馆

这个问题的文档记录太差，无法帮助您超越这一点。

【讨论】：

没有。第一个答案是正确的。我使用了错误版本的 dll。
嗯，在 64 位进程中使用 32 位 DLL 总是会产生异常。

【解决方案4】：

我解决了旧笔记本电脑上 Windows 2000 上的 LPT 端口问题，无法设置数据端口 (pin2-pin9)。

使用这个导入函数：

[DllImport("inpout32.dll", EntryPoint = "Out32")]
public static extern void Out32(int address, int value);

每次重新启动或重新启动 Windows 后，我都必须调用此行：

Out32(0x378 + 2, 0x00);

以便端口正常工作。我认为问题在于双向设置（0x37A 上第 6 位的控制端口）。

【讨论】：