Control your PDA"s LED

王朝c#·作者佚名  2006-12-17
窄屏简体版  字體: |||超大  

I wrote a VB.NET class named LED to control PDA's LED.

我写了一个名为LED的类来控制PDA的LED灯。

Please see http://www.pocketpcdn.com/articles/led.html first to help understand the core of this class.

请首先阅读http://www.pocketpcdn.com/articles/led.html,这将有利于你理解这个类

And here is the class:

以下是这个类:

Public Class LED

Private Structure NLED_SETTINGS_INFO

Public LedNum As UInt32

Public OffOnBlink As UInt32

Public TotalCycleTime As Integer

Public OnTime As Integer

Public OffTime As Integer

Public MetaCycleOn As Integer

Public MetaCycleOff As Integer

End Structure

Private Structure NLED_COUNT_INFO

Public cLeds As Integer

End Structure

Private Const NLED_COUNT_INFO_ID = 0

Private Const NLED_SETTINGS_INFO_ID = 2

Private Declare Function NLedGetDeviceInfo Lib 'coredll.dll' (ByVal nID As Integer, ByRef pOutput As NLED_COUNT_INFO) As Boolean

Private Declare Function NLedSetDevice Lib 'coredll.dll' (ByVal nID As Integer, ByRef pOutput As NLED_SETTINGS_INFO) As Boolean

Public Enum Status

OFF

[ON]

BLINK

End Enum

Public Function GetLedCount() As Integer

Dim nci As NLED_COUNT_INFO

Dim wCount As Integer = 0

If NLedGetDeviceInfo(NLED_COUNT_INFO_ID, nci) Then

wCount = CInt(nci.cLeds)

End If

Return wCount

End Function

Public Sub SetLedStatus(ByVal wLed As Integer, ByVal wStatus As Status)

Dim nsi As NLED_SETTINGS_INFO

nsi.LedNum = System.Convert.ToUInt32(wLed)

nsi.OffOnBlink = System.Convert.ToUInt32(wStatus)

NLedSetDevice(NLED_SETTINGS_INFO_ID, nsi)

End Sub

End Class

And the test form is here:

这儿是用于测试窗体:

Imports System.Collections

Imports System.Text

Public Class Form1

Inherits System.Windows.Forms.Form

Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem

Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem

Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu

#Region ' Windows 窗体设计器生成的代码 '

Public Sub New()

MyBase.New()

'该调用是 Windows 窗体设计器所必需的。

InitializeComponent()

'在 InitializeComponent() 调用之后添加任何初始化

End Sub

'窗体重写 dispose 以清理组件列表。

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

MyBase.Dispose(disposing)

End Sub

'注意: 以下过程是 Windows 窗体设计器所必需的

'可以使用 Windows 窗体设计器修改此过程。

'不要使用代码编辑器修改它。

Friend WithEvents Label1 As System.Windows.Forms.Label

Friend WithEvents Label2 As System.Windows.Forms.Label

Friend WithEvents Panel1 As System.Windows.Forms.Panel

Friend WithEvents rbLED As System.Windows.Forms.RadioButton

Friend WithEvents rbOn As System.Windows.Forms.RadioButton

Friend WithEvents rbOff As System.Windows.Forms.RadioButton

Friend WithEvents rbBlink As System.Windows.Forms.RadioButton

Private Sub InitializeComponent()

Me.MainMenu1 = New System.Windows.Forms.MainMenu

Me.MenuItem1 = New System.Windows.Forms.MenuItem

Me.MenuItem2 = New System.Windows.Forms.MenuItem

Me.rbLED = New System.Windows.Forms.RadioButton

Me.Label1 = New System.Windows.Forms.Label

Me.Label2 = New System.Windows.Forms.Label

Me.Panel1 = New System.Windows.Forms.Panel

Me.rbOn = New System.Windows.Forms.RadioButton

Me.rbOff = New System.Windows.Forms.RadioButton

Me.rbBlink = New System.Windows.Forms.RadioButton

'

'MainMenu1

'

Me.MainMenu1.MenuItems.Add(Me.MenuItem1)

'

'MenuItem1

'

Me.MenuItem1.MenuItems.Add(Me.MenuItem2)

Me.MenuItem1.Text = '菜单'

'

'MenuItem2

'

Me.MenuItem2.Text = '退出'

'

'rbLED

'

Me.rbLED.Checked = True

Me.rbLED.Location = New System.Drawing.Point(24, 48)

Me.rbLED.Size = New System.Drawing.Size(60, 16)

Me.rbLED.Text = '0'

'

'Label1

'

Me.Label1.Location = New System.Drawing.Point(12, 24)

Me.Label1.Size = New System.Drawing.Size(80, 16)

Me.Label1.Text = 'LED No.'

'

'Label2

'

Me.Label2.Location = New System.Drawing.Point(120, 24)

Me.Label2.Size = New System.Drawing.Size(80, 16)

Me.Label2.Text = 'LED Status'

'

'Panel1

'

Me.Panel1.Controls.Add(Me.rbOn)

Me.Panel1.Controls.Add(Me.rbOff)

Me.Panel1.Controls.Add(Me.rbBlink)

Me.Panel1.Location = New System.Drawing.Point(136, 48)

Me.Panel1.Size = New System.Drawing.Size(76, 96)

'

'rbOn

'

Me.rbOn.Location = New System.Drawing.Point(6, 36)

Me.rbOn.Size = New System.Drawing.Size(38, 20)

Me.rbOn.Text = 'On'

'

'rbOff

'

Me.rbOff.Checked = True

Me.rbOff.Location = New System.Drawing.Point(6, 8)

Me.rbOff.Size = New System.Drawing.Size(38, 20)

Me.rbOff.Text = 'Off'

'

'rbBlink

'

Me.rbBlink.Location = New System.Drawing.Point(8, 64)

Me.rbBlink.Size = New System.Drawing.Size(52, 20)

Me.rbBlink.Text = 'Blink'

'

'Form1

'

Me.ClientSize = New System.Drawing.Size(234, 270)

Me.Controls.Add(Me.Panel1)

Me.Controls.Add(Me.Label2)

Me.Controls.Add(Me.Label1)

Me.Controls.Add(Me.rbLED)

Me.Text = 'PPC LED Demo'

End Sub

#End Region

Public LED As New LED

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Me.Text = LED.GetLedCount()

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Dim wLed As Integer = CInt(InputBox('Led', , '0'))

Dim wStatus As Integer = CInt(InputBox('Status', , '1'))

LED.SetLedStatus(wLed, wStatus)

End Sub

Private Sub rbOff_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rbOff.CheckedChanged

LED.SetLedStatus(0, LED.Status.OFF)

End Sub

Private Sub rbOn_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rbOn.CheckedChanged

LED.SetLedStatus(0, LED.Status.ON)

End Sub

Private Sub rbBlink_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles rbBlink.CheckedChanged

LED.SetLedStatus(0, LED.Status.BLINK)

End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

End Sub

End Class

 
 
 
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