Option Explicit
Dim intTime As Integer
Private strSendText As String '发伍辩送文本数据
Private bytSendByte() As Byte '发送二进制数据
Private blnReceiveFlag As Boolean
Private blnAutoSendFlag As Boolean
Private intPort As Integer
Private strSet As String
Private intReceiveLen As Integer
Private bytReceiveByte() As Byte
Private strAscii As String '设置初值
Private strHex As String
Private intHexWidth As Integer
Private intLine As Integer
Private m As Integer
Private strAddress As String
'字符表示的十六进芦明制数转化为相应的整数,错误则返回 -1
Function ConvertHexChr(str As String) As Integer
Dim test As Integer
test = Asc(str)
If test >= Asc("0") And test <= Asc("9") Then
test = test - Asc("0")
ElseIf test >= Asc("a") And test <= Asc("f") Then
test = test - Asc("a") + 10
ElseIf test >= Asc("A") And test <= Asc("F") Then
test = test - Asc("A") + 10
Else
test = -1 '出错信息
End If
ConvertHexChr = test
End Function
'字符串表示的十六进制数据转化为相应的字节串,返回转化后的字节数
Function strHexToByteArray(strText As String, bytByte() As Byte) As Integer
Dim HexData As Integer '十六进制(二进制)数据字节对应值
Dim hstr As String * 1 '高位字符
Dim lstr As String * 1 '低位字符
Dim HighHexData As Integer '高位数值
Dim LowHexData As Integer '低位数值
Dim HexDataLen As Integer '字陪橘告节数
Dim StringLen As Integer '字符串长度
Dim Account As Integer
Dim n As Integer
'计数
'txtSend = "" '设初值
HexDataLen = 0
strHexToByteArray = 0
StringLen = Len(strText)
Account = StringLen \ 2
ReDim bytByte(Account)
For n = 1 To StringLen
Do '清除空格
hstr = Mid(strText, n, 1)
n = n + 1
If (n - 1) >StringLen Then
HexDataLen = HexDataLen - 1
Exit For
End If
Loop While hstr = " "
Do
lstr = Mid(strText, n, 1)
n = n + 1
If (n - 1) >StringLen Then
HexDataLen = HexDataLen - 1
Exit For
End If
Loop While lstr = " "
n = n - 1
If n >StringLen Then
HexDataLen = HexDataLen - 1
Exit For
End If
HighHexData = ConvertHexChr(hstr)
LowHexData = ConvertHexChr(lstr)
If HighHexData = -1 Or LowHexData = -1 Then '遇到非法字符中断转化
HexDataLen = HexDataLen - 1
Exit For
Else
HexData = HighHexData * 16 + LowHexData
bytByte(HexDataLen) = HexData
HexDataLen = HexDataLen + 1
End If
Next n
If HexDataLen >0 Then '修正最后一次循环改变的数值
HexDataLen = HexDataLen - 1
ReDim Preserve bytByte(HexDataLen)
Else
ReDim Preserve bytByte(0)
End If
If StringLen = 0 Then '如果是空串,则不会进入循环体
strHexToByteArray = 0
Else
strHexToByteArray = HexDataLen + 1
End If
End Function
Private Sub cmdManualSend_Click()
If Not Me.MSComm.PortOpen Then
Me.MSComm.CommPort = intPort
Me.MSComm.Settings = strSet
Me.MSComm.PortOpen = True
End If
Call ctrTimer_Timer
If Not blnAutoSendFlag Then
Me.MSComm.PortOpen = False
End If
End Sub
Private Sub cmdAutoSend_Click()
If blnAutoSendFlag Then
Me.ctrTimer.Enabled = False
If Not blnReceiveFlag Then
Me.MSComm.PortOpen = False
End If
Me.cmdAutoSend.Caption = "自动发送"
Else
If Not Me.MSComm.PortOpen Then
Me.MSComm.CommPort = intPort
Me.MSComm.Settings = strSet
Me.MSComm.PortOpen = True
End If
Me.ctrTimer.Interval = intTime
Me.ctrTimer.Enabled = True
Me.cmdAutoSend.Caption = "停止发送"
End If
blnAutoSendFlag = Not blnAutoSendFlag
End Sub
Private Sub ctrTimer_Timer()
Dim longth As Integer
strSendText = Me.txtSend.Text
longth = strHexToByteArray(strSendText, bytSendByte())
If longth >0 Then
Me.MSComm.Output = bytSendByte
End If
End Sub
'输入处理,处理接收到的字节流,并保存在全局变量
Private Sub InputManage(bytInput() As Byte, intInputLenth As Integer)
Dim n As Integer '定义变量及初始化
ReDim Preserve bytReceiveByte(intReceiveLen + intInputLenth)
For n = 1 To intInputLenth Step 1
bytReceiveByte(intReceiveLen + n - 1) = bytInput(n - 1)
Next n
intReceiveLen = intReceiveLen + intInputLenth
End Sub
'为输出准备文本,保存在全局变量
'总行数保存在intLine
Public Sub GetDisplayText()
Dim n As Integer
Dim intValue As Integer
Dim intHighHex As Integer
Dim intLowHex As Integer
Dim strSingleChr As String * 1
Dim intAddress As Integer
Dim intAddressArray(8) As Integer
Dim intHighAddress As Integer
strAscii = "" '设置初值
strHex = ""
strAddress = ""
'获得16进制码和ASCII码的字符串
For n = 1 To intReceiveLen
intValue = bytReceiveByte(n - 1)
If intValue <32 Or intValue >128 Then '处理非法字符
strSingleChr = Chr(46) '对于不能显示的ASCII码,
Else '用"."表示
strSingleChr = Chr(intValue)
End If
strAscii = strAscii + strSingleChr
intHighHex = intValue \ 16
intLowHex = intValue - intHighHex * 16
If intHighHex <10 Then
intHighHex = intHighHex + 48
Else
intHighHex = intHighHex + 55
End If
If intLowHex <10 Then
intLowHex = intLowHex + 48
Else
intLowHex = intLowHex + 55
End If
strHex = strHex + Chr$(intHighHex) + Chr$(intLowHex) + " "
If (n Mod intHexWidth) = 0 Then
strAscii = strAscii + Chr$(13) + Chr$(10)
strHex = strHex + Chr$(13) + Chr$(10)
Else
End If
Next n
txtAsc = strAscii 'Ascii
txtHex = strHex '16进制
'获得地址字符串
intLine = intReceiveLen \ intHexWidth
If (intReceiveLen - intHexWidth * intLine) >0 Then
intLine = intLine + 1
End If
'设置换行
For n = 1 To intLine
intAddress = (n - 1) * intHexWidth
intHighAddress = 8
intAddressArray(0) = intAddress
For m = 1 To intHighAddress
intAddressArray(m) = intAddressArray(m - 1) \ 16
Next m
For m = 1 To intHighAddress
intAddressArray(m - 1) = intAddressArray(m - 1) - intAddressArray(m) * 16
Next m
For m = 1 To intHighAddress
If intAddressArray(intHighAddress - m) <10 Then
intAddressArray(intHighAddress - m) = intAddressArray(intHighAddress - m) + Asc("0")
Else
intAddressArray(intHighAddress - m) = intAddressArray(intHighAddress - m) + Asc("A") - 10
End If
strAddress = strAddress + Chr$(intAddressArray(intHighAddress - m))
Next m
strAddress = strAddress + Chr$(13) + Chr$(10)
Next n
txtAdd = strAddress '地址
End Sub
Private Sub cmdReceive_Click()
If blnReceiveFlag Then
If Not blnReceiveFlag Then
Me.MSComm.PortOpen = False
End If
Me.cmdReceive.Caption = "开始接收"
Else
If Not Me.MSComm.PortOpen Then
Me.MSComm.CommPort = intPort
Me.MSComm.Settings = strSet
Me.MSComm.PortOpen = True
End If
Me.MSComm.InputLen = 0
Me.MSComm.InputMode = 0
Me.MSComm.InBufferCount = 0
Me.MSComm.RThreshold = 1
Me.cmdReceive.Caption = "停止接收"
End If
blnReceiveFlag = Not blnReceiveFlag
End Sub
Private Sub Form_Load()
intHexWidth = 8
txtAdd = ""
txtHex = ""
txtAsc = ""
txtSend = "11"
txtAdd.Width = 1335
txtHex.Width = 2535
txtAsc.Width = 1215
'设置默认发送接收关闭状态
blnAutoSendFlag = False
blnReceiveFlag = False
'接收初始化
intReceiveLen = 0
'默认发送方式为16进制
'intOutMode = 1
'初始化串行口
intPort = 1
intTime = 1000
strSet = "9600,n,8,1"
Me.MSComm.InBufferSize = 1024
Me.MSComm.OutBufferSize = 512
If Not Me.MSComm.PortOpen Then
Me.MSComm.CommPort = intPort
Me.MSComm.Settings = strSet
Me.MSComm.PortOpen = True
End If
Me.MSComm.PortOpen = False
End Sub
Private Sub cmdClear_Click()
Dim bytTemp(0) As Byte
ReDim bytReceiveByte(0)
intReceiveLen = 0
Call InputManage(bytTemp, 0)
Call GetDisplayText
Call disPlay
End Sub
Private Sub MsComm_OnComm()
Dim bytInput() As Byte
Dim intInputLen As Integer
Select Case Me.MSComm.CommEvent
Case comEvReceive
If blnReceiveFlag Then
If Not Me.MSComm.PortOpen Then
Me.MSComm.CommPort = intPort
Me.MSComm.Settings = strSet
Me.MSComm.PortOpen = True
End If
'此处添加处理接收的代码
Me.MSComm.InputMode = comInputModeBinary '二进制接收
intInputLen = Me.MSComm.InBufferCount
ReDim bytInput(intInputLen)
bytInput = Me.MSComm.Input
Call InputManage(bytInput, intInputLen)
Call GetDisplayText
'Call disPlay
If Not blnReceiveFlag Then
Me.MSComm.PortOpen = False
End If
End If
End Select
End Sub
Private Sub disPlay()
txtHex = ""
txtAsc = ""
txtAdd = ""
End Sub
vb写串口调试软件很简单，就用一个mscomm控件就可以了下面是主要代码：
Private Sub Cmd_Click()
MSComm1.CommPort = 1 '决定串口号
MSComm1.Settings = "9600,n,8,1" '设置波特率、校验神中橡位、数据位、停止位的字符串
MSComm1.PortOpen = True '打开串口
MSComm1.Output = "abcd" '向串口发送字符串"abcd"
MSComm1.PortOpen = False '关闭串口
End Sub
Private Sub MSComm1_OnComm() '当收到串口返回值时触发这个事件
Dim s As String '定义一个字符串变量
s = MSComm1.Input '培帆将串口游旁返回值放到字符串变量s中
MsgBox s '以消息框的方式显示串口返回的内容
End Sub
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