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:\Users\gaoji\Desktop\RISC_SPM\gen.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。