前言

小时候记得excel里有一个神秘的赛车游戏，发现excel原来并不简单啊；

之前我哥跟我讲excel可能是最牛逼的编程软件，但是当时我没信，现在我有点信了；

工作后发现很多代码原来并不需要写，通过excel、xml直接生成还是爽爽的；

最好的是，自带的编译器自动补全自动大小写转换自动联想比平时用的IDE舒服多了；

所以说啊，学一学VBA还是挺有意思的，你也不知道啥时候就用得上；

作为我写的第一个excel vba demo，必须好好记录下。

目标

通过excel添加信号，并生成Verilog module代码，每个sheet作为一个模块，最终的实现的效果如下：

1.点击添加信号；

2.输入信号名称；

3.输入信号位宽，默认为1；

4.输入信号类型，默认wires；

5.输入是否接口，默认no；

6.完成一个信号输入后，可以继续添加；单一信号输入途中选择取消，则推出输入；

7.点击“生成代码”，直接生成module rtl，除了对齐失败以外，可以说非常完美；

实现

列举一下用到的sub/function；

信号输入

 Option Explicit  Dim sigName As String Dim sigWidh As String Dim sigType As String Dim sigPort As String  Public Type sigInfo     name As String     widh As Integer     type As String     port As String End Type

全局定义，由于开始没考虑清楚，有重复定义之嫌；全局变量用来输入和获取信号信息；

 Private Function gainLastRow() As Integer      Dim lastRow As Integer          lastRow = ActiveSheet.UsedRange.Rows.Count     gainLastRow = ActiveSheet.UsedRange.Rows(lastRow).Row + 1     'Debug.Print gainLastRow      End Function

获取当前sheet最后一行位置，之后添加信号时默认向最后添加；

 Private Function gainSigIn() As Boolean      sigName = InputBox(prompt:="信号名称")     If sigName = "" Then         gainSigIn = False         Exit Function     End If                   sigWidh = InputBox(prompt:="信号位宽", Default:="1")     If sigWidh = "" Then         gainSigIn = False         Exit Function     End If          sigType = InputBox(prompt:="信号类型reg/wire??", Default:="wire")     If sigType = "" Then         gainSigIn = False         Exit Function     End If          sigPort = InputBox(prompt:="接口属性no/input/output/inout??", Default:="no")     If sigPort = "" Then         gainSigIn = False         Exit Function     End If          gainSigIn = True      End Function

通过inputbox函数获取键入的信号信息；

 Public Sub mainAddSig()          Dim addRow As Integer          Do         If gainSigIn() = True Then             'Debug.Print "@@@@@@@"             addRow = gainLastRow()             With ActiveSheet                 .Cells(addRow, 1).Value = sigName                 .Cells(addRow, 2).Value = sigWidh                 .Cells(addRow, 3).Value = sigType                 .Cells(addRow, 4).Value = sigPort             End With         Else             Exit Sub         End If     Loop Until MsgBox("是否继续输入", vbOKCancel) <> vbOK      End Sub

“添加信号”按钮绑定sub，将获取到的信号信息写入单元格最后一行后面，写入完成后询问是否继续输入；

生成代码

 Private Function gainOrgLoc() As Integer      Dim keyCell As Range          Cells(1, 1).Select          'Set keyCell = ActiveSheet.UsedRange.Find(What:="???????", After:=ActiveCell, LookIn:=xlFormulas, LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, MatchCase:=True, SearchFormat:=False)     Set keyCell = Cells.Find(What:="???????", After:=ActiveCell, LookIn:=xlFormulas, LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, MatchCase:=True, SearchFormat:=False)      If keyCell Is Nothing Then         gainOrgLoc = -1     Else         gainOrgLoc = keyCell.Row         'Debug.Print gainOrgLoc     End If          End Function

以左上角(1,1)坐标为起始，寻找标志“信号名称”，其下一行到最后一行为信号定义区间；

 Private Function gainSigInfo(setRow As Integer) As sigInfo          With ActiveSheet         gainSigInfo.name = .Cells(setRow, 1)         gainSigInfo.widh = .Cells(setRow, 2)         gainSigInfo.type = .Cells(setRow, 3)         gainSigInfo.port = .Cells(setRow, 4)     End With      End Function

获取某一行信号信息；

 Public Sub genRtlCode()      Dim inputArray As New Collection     Dim outputArray As New Collection     Dim inoutArray As New Collection     Dim wireArray As New Collection     Dim regArray As New Collection      Dim startRow As Integer     Dim sig  As sigInfo     Dim ss As New Collection          Dim i As Integer     Dim s As String              startRow = gainOrgLoc() + 1          For i = startRow To gainLastRow         sig = gainSigInfo(i)         If sig.name <> "" Then             If sig.port = "input" Then                 inputArray.Add ("    input  " & sig.type & " [" & sig.widh & " -1:0] " & sig.name & ";")                 'Debug.Print "    input " & sig.type & " [" & sig.widh & " -1:0] " & sig.name & ";"             ElseIf sig.port = "output" Then                 outputArray.Add ("    output " & sig.type & " [" & sig.widh & " -1:0] " & sig.name & ";")                 'Debug.Print "    output " & sig.type & " [" & sig.widh & " -1:0] " & sig.name & ";"             ElseIf sig.port = "inout" Then                 inoutArray.Add ("    inout  " & sig.type & " [" & sig.widh & " -1:0] " & sig.name & ";")             ElseIf sig.port = "no" And sig.type = "wire" Then                 wireArray.Add ("    wire " & " [" & sig.widh & " -1:0] " & sig.name & ";")                 'Debug.Print "    wire " & " [" & sig.widh & " -1:0] " & sig.name & ";"             ElseIf sig.port = "no" And sig.type = "reg" Then                 regArray.Add ("    reg  " & " [" & sig.widh & " -1:0] " & sig.name & ";")                 'Debug.Print "    reg " & " [" & sig.widh & " -1:0] " & sig.name & ";"             End If         End If     Next          Open "C:UsersgaojiDesktopRISC_SPMgen.sv" For Output As #1     Print #1, "module " & ActiveSheet.name & "("          For i = 1 To inputArray.Count         s = inputArray.Item(i)         Print #1, s     Next     For i = 1 To outputArray.Count         s = outputArray.Item(i)         Print #1, s     Next     For i = 1 To inoutArray.Count         s = inoutArray.Item(i)         Print #1, s     Next          Print #1, ");"          For i = 1 To regArray.Count         s = regArray.Item(i)         Print #1, s     Next     For i = 1 To wireArray.Count         s = wireArray.Item(i)         Print #1, s     Next          Print #1, "endmodule"          Close #1           End Sub

从起始行到最终行，获取每一行的信号信息并根据属性组织代码放入不同的collection中；

之后将组织好的代码写入文件中。