所以我试图使用国家仪器库中的UsbRaw与我的USB设备进行通信，并开始从我的USB中传输数据。我的第一个问题是确定我要使用的USB设备的第一步。我确定必须在代码中设置USB的供应商ID和产品ID，但我不知道如何执行此操作，但是不幸的是，在新版本的NiVisa中没有UsbRaw的示例，并且仅用于不再支持的VisaNs库。她是VisaNs UsbRaw的一个例子：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using NationalInstruments.VisaNS;
namespace NationalInstruments.Examples.SimpleReadWrite
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class MainForm : System.Windows.Forms.Form
{
private UsbRaw mySession;
private string lastResourceString = null;
private System.Windows.Forms.TextBox readText;
private System.Windows.Forms.Button openSessionButton;
private System.Windows.Forms.Button clearButton;
private System.Windows.Forms.Button closeSessionButton;
private System.Windows.Forms.Label stringToReadLabel;
private System.Windows.Forms.Button eInterruptsButton;
private System.Windows.Forms.Button dInterruptsButton;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public MainForm()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
SetupControlState(false);
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(mySession != null)
{
mySession.Dispose();
}
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
this.eInterruptsButton = new System.Windows.Forms.Button();
this.openSessionButton = new System.Windows.Forms.Button();
this.readText = new System.Windows.Forms.TextBox();
this.clearButton = new System.Windows.Forms.Button();
this.closeSessionButton = new System.Windows.Forms.Button();
this.stringToReadLabel = new System.Windows.Forms.Label();
this.dInterruptsButton = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// eInterruptsButton
//
this.eInterruptsButton.Location = new System.Drawing.Point(8, 38);
this.eInterruptsButton.Name = "eInterruptsButton";
this.eInterruptsButton.Size = new System.Drawing.Size(111, 23);
this.eInterruptsButton.TabIndex = 3;
this.eInterruptsButton.Text = "Enable Interrupts";
this.eInterruptsButton.Click += new System.EventHandler(this.eInterruptsButton_Click);
//
// openSessionButton
//
this.openSessionButton.Location = new System.Drawing.Point(8, 5);
this.openSessionButton.Name = "openSessionButton";
this.openSessionButton.Size = new System.Drawing.Size(111, 23);
this.openSessionButton.TabIndex = 0;
this.openSessionButton.Text = "Open Session";
this.openSessionButton.Click += new System.EventHandler(this.openSession_Click);
//
// readText
//
this.readText.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.readText.Location = new System.Drawing.Point(9, 101);
this.readText.Multiline = true;
this.readText.Name = "readText";
this.readText.ReadOnly = true;
this.readText.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
this.readText.Size = new System.Drawing.Size(224, 108);
this.readText.TabIndex = 6;
this.readText.TabStop = false;
this.readText.TextChanged += new System.EventHandler(this.readText_TextChanged);
//
// clearButton
//
this.clearButton.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.clearButton.Location = new System.Drawing.Point(5, 215);
this.clearButton.Name = "clearButton";
this.clearButton.Size = new System.Drawing.Size(231, 24);
this.clearButton.TabIndex = 7;
this.clearButton.Text = "Clear";
this.clearButton.Click += new System.EventHandler(this.clear_Click);
//
// closeSessionButton
//
this.closeSessionButton.Location = new System.Drawing.Point(126, 5);
this.closeSessionButton.Name = "closeSessionButton";
this.closeSessionButton.Size = new System.Drawing.Size(111, 23);
this.closeSessionButton.TabIndex = 1;
this.closeSessionButton.Text = "Close Session";
this.closeSessionButton.Click += new System.EventHandler(this.closeSession_Click);
//
// stringToReadLabel
//
this.stringToReadLabel.Location = new System.Drawing.Point(8, 87);
this.stringToReadLabel.Name = "stringToReadLabel";
this.stringToReadLabel.Size = new System.Drawing.Size(167, 15);
this.stringToReadLabel.TabIndex = 9;
this.stringToReadLabel.Text = "Data:";
//
// dInterruptsButton
//
this.dInterruptsButton.Location = new System.Drawing.Point(126, 38);
this.dInterruptsButton.Name = "dInterruptsButton";
this.dInterruptsButton.Size = new System.Drawing.Size(111, 23);
this.dInterruptsButton.TabIndex = 12;
this.dInterruptsButton.Text = "Disable Interrupts";
this.dInterruptsButton.Click += new System.EventHandler(this.dInterruptsButton_Click);
//
// MainForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(243, 244);
this.Controls.Add(this.dInterruptsButton);
this.Controls.Add(this.stringToReadLabel);
this.Controls.Add(this.closeSessionButton);
this.Controls.Add(this.clearButton);
this.Controls.Add(this.readText);
this.Controls.Add(this.openSessionButton);
this.Controls.Add(this.eInterruptsButton);
this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
this.MaximizeBox = false;
this.MinimumSize = new System.Drawing.Size(251, 278);
this.Name = "MainForm";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "Get USB RAW Interrupts";
this.Load += new System.EventHandler(this.MainForm_Load);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new MainForm());
}
private void openSession_Click(object sender, System.EventArgs e)
{
using (SelectResource sr = new SelectResource())
{
if(lastResourceString != null)
{
sr.ResourceName = lastResourceString;
}
DialogResult result = sr.ShowDialog(this);
if(result == DialogResult.OK)
{
lastResourceString = sr.ResourceName;
Cursor.Current = Cursors.WaitCursor;
try
{
mySession = (UsbRaw)ResourceManager.GetLocalManager().Open(sr.ResourceName);
SetupControlState(true);
}
catch(InvalidCastException)
{
MessageBox.Show("Resource selected must be a USB session");
}
catch(Exception exp)
{
MessageBox.Show(exp.Message);
}
finally
{
Cursor.Current = Cursors.Default;
}
}
}
}
private void closeSession_Click(object sender, System.EventArgs e)
{
SetupControlState(false);
mySession.Dispose();
}
private void clear_Click(object sender, System.EventArgs e)
{
readText.Text = String.Empty;
}
private void SetupControlState(bool isSessionOpen)
{
openSessionButton.Enabled = !isSessionOpen;
closeSessionButton.Enabled = isSessionOpen;
eInterruptsButton.Enabled = isSessionOpen;
dInterruptsButton.Enabled = isSessionOpen;
clearButton.Enabled = isSessionOpen;
if(isSessionOpen)
{
readText.Text = String.Empty;
}
}
private void eInterruptsButton_Click(object sender, System.EventArgs e)
{
mySession.UsbInterrupt += new UsbRawInterruptEventHandler(OnUSBInterrupt);
mySession.EnableEvent(UsbRawEventType.UsbInterrupt, EventMechanism.Handler);
}
private void dInterruptsButton_Click(object sender, System.EventArgs e)
{
mySession.DisableEvent(UsbRawEventType.UsbInterrupt, EventMechanism.Handler);
}
private void OnUSBInterrupt(object sender, UsbRawInterruptEventArgs e)
{
try
{
byte [] data = e.DataBuffer;
readText.Text = String.Empty;
for(int i=0; i<data.Length; i++)
readText.Text = readText.Text + " " + data[i].ToString();
}
catch(Exception exp)
{
MessageBox.Show(exp.Message);
}
}
}
}