DeviceIoControl 求救
我不知道那裹出错，都有连上设备，但就是没辨法控制请帮我看看那出了错。
--------------------编程问答-------------------- 不知道你解決了沒，我改您的程式，並用 Netport-8800 測試過可以用了
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
namespace GPIO
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool DeviceIoControl(
SafeFileHandle hDevice,
uint dwIoControlCode,
ref uint InBuffer,
int nInBufferSize,
byte[] OutBuffer,
UInt32 nOutBufferSize,
ref UInt32 out_count,
IntPtr lpOverlapped);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern SafeFileHandle CreateFile(
string FileName,
ulong DesiredAccess,
uint ShareMode,
IntPtr SecurityAttributes,
uint CreationDisposition,
uint FlagsAndAttributes,
IntPtr hTemplateFile
);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool CloseHandle(SafeFileHandle hObject);
public const int FILE_ATTRIBUTE_NORMAL = 0x00000080;
public const UInt64 GENERIC_READ = 0x80000000;
public const uint OPEN_EXISTING = 3;
public const UInt32 INVALID_HANDLE_VALUE = 0xffffffff;
public const UInt64 GENERIC_WRITE = 0x40000000L;
public const uint FILE_FLAG_OVERLAPPED = 0x40000000;
private const uint FILE_DEVICE_UNKNOWN = 0x00000022;
private const uint FILE_ATTRIBUTE_SYSTEM = 0x00000004;
private const uint USB2SER_IOCTL_INDEX = 0x0800;
private const uint METHOD_BUFFERED = 0;
private const uint FILE_ANY_ACCESS = 0;
protected SafeFileHandle hCOM;
private static uint GP0_SET_VALUE = CTL_CODE(FILE_DEVICE_UNKNOWN, USB2SER_IOCTL_INDEX + 22, METHOD_BUFFERED, FILE_ANY_ACCESS);
static uint CTL_CODE(uint DeviceType, uint Function, uint Method, uint Access)
{
return ((DeviceType << 16) | (Access << 14) | (Function << 2) | Method);
}
private void button1_Click(object sender, EventArgs e)
{
//serialPort1.StopBits = System.IO.Ports.StopBits.One;
//serialPort1.PortName = cmbCOM.Text;
//serialPort1.BaudRate = 115200;
//serialPort1.Open();
//IntPtr hCOM;
string tmpStr = "\\\\.\\" + cmbCOM.Text;
hCOM = CreateFile(tmpStr, GENERIC_READ | GENERIC_WRITE,
0, IntPtr.Zero, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, (IntPtr)null);
string strResponse = "OPEN " + cmbCOM.Text + " port ";
if (hCOM.Equals( (IntPtr)INVALID_HANDLE_VALUE))
strResponse += "FAILED.";
else
{
strResponse += "Successfully!";
//m_hCOM = hCOM;
//m_hCOM = FindWindow(null, "Form1");
//m_comStr = comStr;
}
textBox1.Text = strResponse;
//AddResponseString(strResponse);
//if (!m_hCOM.Equals(INVALID_HANDLE_VALUE))
// OnBnClickedBtnSetstatus();
// OpenSymbolicPort();
}
private void button2_Click(object sender, EventArgs e)
{
// 關閉232
serialPort1.Close();
}
private void button3_Click(object sender, EventArgs e)
{
uint val;
val = (uint)(int.Parse(textBox2.Text));
bool bSuccess = PL2303_GP0_SetValue(hCOM, val);
if (bSuccess)
textBox1.Text += "SET GP0 value Successfully!";
if (!bSuccess)
{
CloseHandle(hCOM);
textBox1.Text += "SET GP0 value FAILED.";
}
textBox1.Text += val.ToString();
}
private bool PL2303_GP0_SetValue(SafeFileHandle hDrv, uint val)
{
UInt32 nBytes=0;
byte[] addr = new byte[6];
bool bSuccess = DeviceIoControl(hDrv, GP0_SET_VALUE, ref val, sizeof(uint), null, 0, ref nBytes, IntPtr.Zero);
return bSuccess;
}
}
}
NetPort-8800 只有用 GP1 去控制開關
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public const int FILE_ATTRIBUTE_NORMAL = 0x00000080;
public const uint GENERIC_READ = 0x80000000;
public const uint GENERIC_WRITE = 0x40000000;
public const int OPEN_EXISTING = 3;
// public const UInt32 INVALID_HANDLE_VALUE = 0xffffffff;
private const uint FILE_FLAG_OVERLAPPED = 0x40000000;
private const uint FILE_DEVICE_UNKNOWN = 0x00000022;
private const uint FILE_ATTRIBUTE_SYSTEM = 0x00000004;
private const uint USB2SER_IOCTL_INDEX = 0x0800;
private const uint METHOD_BUFFERED = 0;
private const uint FILE_ANY_ACCESS = 0;
public Form1()
{
InitializeComponent();
}
IntPtr pl2303 = (IntPtr)(-1);
static uint CTL_CODE(uint DeviceType, uint Function, uint Method, uint Access)
{
return ((DeviceType << 16) | (Access << 14) | (Function << 2) | Method);
}
private void button1_Click(object sender, EventArgs e)
{
if (pl2303 == (IntPtr)(-1))
{
pl2303 = CreateFile("COM8",
GENERIC_READ | GENERIC_WRITE,
0,
IntPtr.Zero,
OPEN_EXISTING,
FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
}
else
MessageBox.Show("Port already open");
if (pl2303 == (IntPtr)(-1))
{
MessageBox.Show("open error");
}
else
{
MessageBox.Show("open success");
}
}
private void button2_Click(object sender, EventArgs e)
{
if (pl2303 != (IntPtr)(-1))
{ // pl2303 open success
byte val = 0;
if (PL2303_GP1_GetValue(pl2303, ref val))
{
button2.Text = val.ToString();
if (val == 0)
{
if (PL2303_GP1_Enable(pl2303))
{
if (PL2303_GP1_SetValue(pl2303, 1))
{
MessageBox.Show("open");
}
}
else
{
MessageBox.Show("enable fail");
}
}
else
{
if (PL2303_GP1_Enable(pl2303))
{
if (PL2303_GP1_SetValue(pl2303, 0))
{
MessageBox.Show("close");
}
}
else
{
MessageBox.Show("enable fail");
}
}
}
}
}
private bool PL2303_GP1_SetValue(IntPtr hDrv, byte val)
{
uint nBytes = 0;
byte dummybyte = 0;
uint GP1_SET_VALUE = CTL_CODE(FILE_DEVICE_UNKNOWN, USB2SER_IOCTL_INDEX + 23, METHOD_BUFFERED, FILE_ANY_ACCESS);
bool bSuccess = DeviceIoControl(hDrv, GP1_SET_VALUE, ref val, sizeof(byte), ref dummybyte,
0,
ref nBytes,
IntPtr.Zero);
// BOOL bSuccess = DeviceIoControl(hDrv, GP1_SET_VALUE,&val, sizeof(BYTE), NULL, 0, &nBytes, NULL);
MessageBox.Show(val.ToString());
return bSuccess;
}
private bool PL2303_GP1_GetValue(IntPtr hDrv, ref byte val)
{
uint nBytes = 0;
byte dummybyte = 0;
uint GP1_GET_VALUE = CTL_CODE(FILE_DEVICE_UNKNOWN, USB2SER_IOCTL_INDEX + 25, METHOD_BUFFERED, FILE_ANY_ACCESS);
bool bSuccess = DeviceIoControl(hDrv, GP1_GET_VALUE, ref dummybyte, 0, ref val,
sizeof(byte),
ref nBytes,
IntPtr.Zero);
// BOOL bSuccess = DeviceIoControl(hDrv, GP1_GET_VALUE,NULL, 0, val, sizeof(BYTE), &nBytes, NULL);
MessageBox.Show(val.ToString());
return bSuccess;
}
private bool PL2303_GP1_Enable(IntPtr hDrv)
{
uint nBytes = 0;
byte enable = 1;
byte dummybyte = 0;
uint GP1_OUTPUT_ENABLE = CTL_CODE(FILE_DEVICE_UNKNOWN, USB2SER_IOCTL_INDEX + 21, METHOD_BUFFERED, FILE_ANY_ACCESS);
bool bSuccess = DeviceIoControl(hDrv, GP1_OUTPUT_ENABLE, ref enable, sizeof(byte), ref dummybyte,
0,
ref nBytes,
IntPtr.Zero);
// BOOL bSuccess = DeviceIoControl(hDrv, GP1_OUTPUT_ENABLE, &enable, sizeof(BYTE), NULL, 0, &nBytes, NULL);
return bSuccess;
}
[DllImport("kernel32.dll")]
private static extern IntPtr CreateFile(
string lpFileName,
uint dwDesiredAccess,
int dwShareMode,
IntPtr lpSecurityAttributes,
int dwCreationDisposition,
uint dwFlagsAndAttributes,
IntPtr hTemplateFile
);
[DllImport("kernel32.dll", EntryPoint = "DeviceIoControl", SetLastError = true)]
internal static extern bool DeviceIoControl(
IntPtr hDevice,
uint dwIoControlCode,
ref byte lpInBuffer,
uint nInBufferSize,
ref byte lpOutBuffer,
int nOutBufferSize,
ref uint lpBytesReturned,
IntPtr lpOverlapped);
}
}
供您參考
补充：.NET技术 , C#
