C# LPT inpout32.dll
I don't get any error or exception.
Button开发者_JAVA百科 in one Window:
private void button1_Click(object sender, EventArgs e)
{
ControlPort.Output(0x378, 0xff);
}
and inpout.dll interface:
class ControlPort
{
[DllImport("inpout32.dll", EntryPoint = "Out32")]
public static extern void Output(int adress, int value);
}
What is wrong? LED on D2 is on all the time.
I have Windows 7 x64 Ultimate.
For x64 you should use "InpOutx64.dll".
Visit: http://www.highrez.co.uk/Downloads/InpOut32/default.htm There you can read more and find samples.
Working code if somebody needs it.
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);
}
}
}
}
You are not going to get an exception when you get this wrong, at most a blue screen. Pick one of:
- you are using the wrong address (0x3bc, 0x2f8)
- you wired the LED wrong
- you broke into the wrong museum to get the hardware
The question is too poorly documented to help you beyond this.
I resolved a problem with LPT port on Windows 2000 on my old laptop, where the data port (pin2-pin9) could not be set.
Using this imported function:
[DllImport("inpout32.dll", EntryPoint = "Out32")]
public static extern void Out32(int address, int value);
after every reboot or restart of Windows I have to call this line:
Out32(0x378 + 2, 0x00);
so that the port works properly. I think the problem is in the bi-directional settings (control port at 6th bit on 0x37A).
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