如何实现PADS导出区分顶层和底层元器件的BOM

导出BOM是硬件工程师在设计PCB时必备的一项任务。通常情况下，导出的BOM中并没有区分顶层和底层的元器件，但是有时候我们需要对这两者进行分开，以便更好地进行统计和管理。

本文将介绍如何通过编写PADS的BOM的导出脚本代码实现这个功能。

       首先，我们需要了解脚本中的原理。在PADS导出BOM的脚本中，一般会读取元器件的相关信息，如元器件编号、名称、数量等。我们需要在脚本中增加元器件层信息的读取，以及在整理元器件时对层信息进行判断，从而实现元器件分顶层和底层的归类统计。

编写以下代码:

代参考代码：

Const Columns = Array("Item","Description","Value","PCB Decal","Ref","OPTION","Quantity","layer")

'Array of column alignment: 0 - Align Left, 1 - Align Right, 2 - Align Center.

Const Align   = Array(0,0,0,0,0,0,0)

Dim fname As String

Sub Main

fname = ActiveDocument

If fname = "" Then

fname = "Untitled"

End If

tempFile = DefaultFilePath & " emp.txt"

Open tempFile For Output As #1

StatusBarText = "Generating report..."

'Output table header

For i = 0 To UBound(Columns)

OutCell Columns(i)

Next

Print #1

Dim part_Count As Integer

part_Count = 0

For Each part In ActiveDocument.Components

If part.Pins.Count > 1 Then

part_Count = part_Count + 1

End If

Next part

ReDim Parts(part_Count, 14) As String

For Each part In ActiveDocument.Components

If part.Pins.Count > 1 Then

For intJ = 1 To 8

Parts(intI,1) = ""

Parts(intI,2) = AttrVal(part, "Description")

Parts(intI,3) = AttrVal(part, "Value")

Parts(intI,4) = part.Decal

Parts(intI,5) = part.Name

Parts(intI,6) = AttrVal(part, "Option")

Parts(intI,7) = ""

Parts(intI,8) =ActiveDocument.LayerName(part.layer)

Next intJ

intI  = intI + 1

End If

Next part

Dim comp_counter As Integer

Dim Species As Integer

Const flag As Integer = 10

Dim Component As String

Dim Component_temp  As String

Dim label As String

comp_counter = 0

Species = 0

For i = 1 To UBound(Parts, 1)    

If Parts(i, flag) = "" Then        

Component = Parts(i, 2) &Parts(i, 6)

label = Parts(i, 5)

comp_counter = 1            

For j = i + 1 To UBound(Parts, 1)      

Component_temp =Parts(j, 2) &Parts(j, 6)

If Component = Component_temp Then                

comp_counter = comp_counter + 1                    

label = label & ", " &Parts(j, 5)                        

Parts(j, flag) = "0"         

End If                

Next j

Parts(i, 5) = label

Parts(i, 7) = Str(comp_counter) 

Species = Species + 1

End If

Next i

Dim NO_ As Integer  

ReDim SpeciesArray1(Species, 8)

ReDim SpeciesArray2(Species, 8) 

NO_ = 1

For i = 1 To UBound(Parts, 1)

If Parts(i, flag) = "" And Parts(i, 8)="TOP" Then  

SpeciesArray1(NO_, 1) = Parts(i, 1)                 

SpeciesArray1(NO_, 2) = Parts(i,2)                

SpeciesArray1(NO_, 3) = Parts(i,3)    

SpeciesArray1(NO_, 4) = Parts(i,4)                  

SpeciesArray1(NO_, 5) = Parts(i,5)                  

SpeciesArray1(NO_, 6) = Parts(i,6)                         

SpeciesArray1(NO_, 7) = Parts(i,7)

SpeciesArray1(NO_, 8) = Parts(i,8)                                   NO_ = NO_ + 1  

ElseIf Parts(i, flag) = "" And Parts(i, 8)="BOT" Then

SpeciesArray2(NO_, 1) = Parts(i, 1)                

SpeciesArray2(NO_, 2) = Parts(i, 2)                

SpeciesArray2(NO_, 3) = Parts(i,3)     

SpeciesArray2(NO_, 4) = Parts(i,4)                  

SpeciesArray2(NO_, 5) = Parts(i, 5)                  

SpeciesArray2(NO_, 6) = Parts(i, 6)                  

SpeciesArray2(NO_, 7) = Parts(i, 7)

SpeciesArray2(NO_, 8) = Parts(i, 8)

NO_ = NO_ + 1

End If

Next i

OutCell "TOP"

Print #1

For i = 1 To UBound(SpeciesArray1, 1)

If SpeciesArray1(i, 8)="TOP" Then

For j =1 To 8

OutCell SpeciesArray1(i,j) 

Next j

Print #1

End If

Next i

OutCell "BOT"

Print #1

For i = 1 To UBound(SpeciesArray2, 1)

If SpeciesArray2(i, 8)="BOT" Then

For j =1 To 8

OutCell SpeciesArray2(i,j) 

Next j

Print #1

End If

Next i

Close #1

ExportToExcel

End Sub

Function AttrVal (obj As Object, nm As String)

AttrVal = IIf(obj.Attributes(nm) Is Nothing, "", obj.Attributes(nm))

End Function

Sub ExportToExcel

FillClipboard

Dim xl As Object

On Error Resume Next

Set xl =  GetObject(,"Excel.Application")

On Error GoTo ExcelError' Enable error trapping.

If xl Is Nothing Then

Set xl =  CreateObject("Excel.Application")

End If

xl.Visible = True

xl.Workbooks.Add

xl.ActiveSheet.Paste

xl.Range("A1:H1").Font.Bold = True

xl.Range("A1:H1").NumberFormat = "@"

xl.Range("A1:H1").AutoFilter

For i = 0 To UBound(Align)

xl.Columns(i + 1).HorizontalAlignment = Choose(Align(i)+1, -4131, -4152, -4108)

Next

xl.ActiveSheet.UsedRange.Columns.AutoFit

'Output Report Header

xl.Rows(1).Insert

xl.Rows(1).Cells(1) = Space(1) & "Part Report for " & fname & " on " & Now

xl.Rows(2).Insert

xl.Rows(1).Font.bold = True

'Output Design Totals

lastRow = xl.ActiveSheet.UsedRange.Rows.Count + 1

xl.Rows(lastRow + 1).Font.bold = True

xl.Rows(lastRow + 1).Cells(1) = Space(1) & "Design Part count: " & ActiveDocument.Components.Count

xl.Range("A1").Select

On Error GoTo 0 ' Disable error trapping.

Exit Sub   

ExcelError:

MsgBox Err.Description, vbExclamation, "Error Running Excel"

On Error GoTo 0 ' Disable error trapping.    

Exit Sub

End Sub

Sub OutCell (txt As String)

Print #1, txt; vbTab;

End Sub

Sub FillClipboard

StatusBarText = "Export Data To Clipboard..."

' Load whole file to string variable    

tempFile = DefaultFilePath & " emp.txt"

Open tempFile  For Input As #1

L = LOF(1)

AllData$ = Input$(L,1)

Close #1

'Copy whole data to clipboard

Clipboard AllData$

Kill tempFile

StatusBarText = ""

End Sub

 

通过以上代码，我们成功实现了在PADS导出BOM时区分顶层和底层元器件的功能。使用这个区分顶层和底层的BOM，工程师可以更好地进行设计分析、成本估算以及供应链管理，提高工作效率和准确性。

总结起来，本文介绍了如何通过修改PADS导出BOM的脚本，实现区分顶层和底层元器件的功能。通过这样的改进，我们可以更好地对电路板中的元器件进行分类和统计，提高设计过程的可视性和管理效果。希望这篇文章对您在设计PCB时的工作有所帮助。