170 lines
6.1 KiB
Python
170 lines
6.1 KiB
Python
# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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from __future__ import division
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import pcbnew
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import FootprintWizardBase
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import PadArray as PA
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class QFPWizard(FootprintWizardBase.FootprintWizard):
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def GetName(self):
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return "QFP"
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def GetDescription(self):
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return "Quad Flat Package (QFP) footprint wizard"
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def GenerateParameterList(self):
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self.AddParam("Pads", "n", self.uInteger, 100, multiple=4, min_value=4)
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self.AddParam("Pads", "pitch", self.uMM, 0.5, designator='e')
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self.AddParam("Pads", "width", self.uMM, 0.25, designator='X1')
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self.AddParam("Pads", "length", self.uMM, 1.5, designator='Y1')
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self.AddParam("Pads", "horizontal spacing", self.uMM, 15, designator='C1')
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self.AddParam("Pads", "vertical spacing", self.uMM, 15, designator='C2')
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self.AddParam("Pads", "oval", self.uBool, True)
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self.AddParam("Package", "width", self.uMM, 14, designator='D1')
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self.AddParam("Package", "height", self.uMM, 14, designator='E1')
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self.AddParam("Package", "courtyard margin", self.uMM, 0.25, min_value=0.2)
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@property
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def pads(self):
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return self.parameters['Pads']
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@property
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def package(self):
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return self.parameters['Package']
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def CheckParameters(self):
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# todo - custom checking
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pass
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def GetValue(self):
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return "QFP-{n}_{x:g}x{y:g}_Pitch{p:g}mm".format(
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n = self.pads['n'],
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x = pcbnew.ToMM(self.package['width']),
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y = pcbnew.ToMM(self.package['height']),
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p = pcbnew.ToMM(self.pads['pitch'])
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)
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def BuildThisFootprint(self):
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pad_pitch = self.pads["pitch"]
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pad_length = self.pads["length"]
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pad_width = self.pads["width"]
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v_pitch = self.pads["vertical spacing"]
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h_pitch = self.pads["horizontal spacing"]
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pads_per_row = int(self.pads["n"] // 4)
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row_len = (pads_per_row - 1) * pad_pitch
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pad_shape = pcbnew.PAD_SHAPE_OVAL if self.pads["oval"] else pcbnew.PAD_SHAPE_RECT
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h_pad = PA.PadMaker(self.module).SMDPad( pad_length, pad_width,
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shape=pad_shape, rot_degree=90.0)
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v_pad = PA.PadMaker(self.module).SMDPad( pad_length, pad_width, shape=pad_shape)
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#left row
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pin1Pos = pcbnew.wxPoint(-h_pitch / 2, 0)
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array = PA.PadLineArray(h_pad, pads_per_row, pad_pitch, True, pin1Pos)
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array.SetFirstPadInArray(1)
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array.AddPadsToModule(self.draw)
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#bottom row
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pin1Pos = pcbnew.wxPoint(0, v_pitch / 2)
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array = PA.PadLineArray(v_pad, pads_per_row, pad_pitch, False, pin1Pos)
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array.SetFirstPadInArray(pads_per_row + 1)
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array.AddPadsToModule(self.draw)
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#right row
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pin1Pos = pcbnew.wxPoint(h_pitch / 2, 0)
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array = PA.PadLineArray(h_pad, pads_per_row, -pad_pitch, True,
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pin1Pos)
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array.SetFirstPadInArray(2*pads_per_row + 1)
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array.AddPadsToModule(self.draw)
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#top row
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pin1Pos = pcbnew.wxPoint(0, -v_pitch / 2)
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array = PA.PadLineArray(v_pad, pads_per_row, -pad_pitch, False,
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pin1Pos)
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array.SetFirstPadInArray(3*pads_per_row + 1)
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array.AddPadsToModule(self.draw)
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offset = pcbnew.FromMM(0.15)
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x = self.parameters["Package"]["width"] / 2 + offset
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y = self.parameters["Package"]["height"] / 2 + offset
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inner = (row_len / 2) + pad_pitch
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# Add outline to F_Fab layer
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self.draw.SetLayer(pcbnew.F_Fab)
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bevel = min( pcbnew.FromMM(1.0), self.package['width']/2, self.package['height']/2 )
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w = self.package['width']
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h = self.package['height']
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# outermost limits of pins
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right_edge = (h_pitch + pad_length) / 2
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left_edge = -right_edge
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bottom_edge = (v_pitch + pad_length) / 2
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top_edge = -bottom_edge
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self.draw.BoxWithDiagonalAtCorner(0, 0, w, h, bevel)
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# Draw silkscreen
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self.draw.SetLayer(pcbnew.F_SilkS)
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#top left - as per IPC-7351C
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self.draw.Polyline([(-inner, -y), (-x, -y), (-x, -inner), (left_edge, -inner)])
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# top right
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self.draw.Polyline([(inner, -y), (x, -y), (x, -inner)])
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# bottom left
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self.draw.Polyline([(-inner, y), (-x, y), (-x, inner)])
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# bottom right
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self.draw.Polyline([(inner, y), (x, y), (x, inner)])
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# Courtyard
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cmargin = self.parameters["Package"]["courtyard margin"]
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self.draw.SetLayer(pcbnew.F_CrtYd)
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sizex = (right_edge + cmargin) * 2
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sizey = (bottom_edge + cmargin) * 2
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# round size to nearest 0.1mm, rectangle will thus land on a 0.05mm grid
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sizex = pcbnew.PutOnGridMM(sizex, 0.1)
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sizey = pcbnew.PutOnGridMM(sizey, 0.1)
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# set courtyard line thickness to the one defined in KLC
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thick = self.draw.GetLineThickness()
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self.draw.SetLineThickness(pcbnew.FromMM(0.05))
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self.draw.Box(0, 0, sizex, sizey)
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# restore line thickness to previous value
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self.draw.SetLineThickness(pcbnew.FromMM(thick))
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#reference and value
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text_size = self.GetTextSize() # IPC nominal
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text_offset = v_pitch / 2 + text_size + pad_length / 2
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self.draw.Value(0, text_offset, text_size)
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self.draw.Reference(0, -text_offset, text_size)
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# set SMD attribute
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self.module.SetAttributes(pcbnew.MOD_CMS)
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QFPWizard().register()
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