123 lines
4.7 KiB
Python
123 lines
4.7 KiB
Python
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# Copyright 2019-2020 Julian Fellinger
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#
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# 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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import FootprintWizardBase
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import pcbnew
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from pcbnew import *
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class MutualcapButtonWizard(FootprintWizardBase.FootprintWizard):
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def GetName(self):
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"""
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Return footprint name.
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This is specific to each footprint class, you need to implement this
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"""
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return "Mutualcap Touch Button"
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def GetDescription(self):
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"""
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Return footprint description.
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This is specific to each footprint class, you need to implement this
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"""
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return "Wizard for Mutual Capacitance Touch Buttons."
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def GetValue(self):
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return "TouchButton-{width:g}x{height:g}mm".format(
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width = pcbnew.ToMM(self.pads["Width"]),
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height= pcbnew.ToMM(self.pads["Height"])
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)
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def GenerateParameterList(self):
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self.AddParam("Pads", "Width", self.uMM, 12)
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self.AddParam("Pads", "Height", self.uMM, 12)
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self.AddParam("Pads", "Outer electrode width", self.uMM, 1)
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self.AddParam("Pads", "Inner electrode width", self.uMM, 0.1)
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self.AddParam("Pads", "Draw line around button", self.uBool, True)
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@property
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def pads(self):
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return self.parameters["Pads"]
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# build a rectangular pad
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def smdRectPad(self,module,size,pos,name):
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pad = D_PAD(module)
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pad.SetSize(size)
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pad.SetShape(PAD_SHAPE_RECT)
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pad.SetAttribute(PAD_ATTRIB_SMD)
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layerset = pcbnew.LSET()
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layerset.AddLayer(pcbnew.F_Cu)
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pad.SetLayerSet(layerset)
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pad.SetPos0(pos)
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pad.SetPosition(pos)
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pad.SetName(name)
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return pad
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# This method checks the parameters provided to wizard and set errors
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def CheckParameters(self):
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pass
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def BuildThisFootprint(self):
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# o refers to the outer (drive) electrode
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# i refers to the inner (receive) electrode
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w = self.pads["Width"]
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h = self.pads["Height"]
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oew = self.pads["Outer electrode width"]
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iew = self.pads["Inner electrode width"]
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drawBox = self.pads["Draw line around button"]
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oFingerCount = int((w-3*oew-iew)/(1.5*oew+iew))
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oBorderWidth = (w-oew-iew-oFingerCount*(1.5*oew+iew))/2
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clearance = oew/2
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###border h
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self.module.SetLayer(F_Cu)
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size_pad = pcbnew.wxSize( w, oew )
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self.module.Add(self.smdRectPad(self.module,size_pad, pcbnew.wxPoint(0,(-h/2)+oew/2),str(1)))
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self.module.Add(self.smdRectPad(self.module,size_pad, pcbnew.wxPoint(0,( h/2)-oew/2),str(1)))
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###border v
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size_pad = pcbnew.wxSize(oBorderWidth, h-2*oew)
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self.module.Add(self.smdRectPad(self.module,size_pad, pcbnew.wxPoint((-w/2)+oBorderWidth/2,0),str(1)))
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self.module.Add(self.smdRectPad(self.module,size_pad, pcbnew.wxPoint(( w/2)-oBorderWidth/2,0),str(1)))
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xPos = -w/2+oBorderWidth+clearance+iew
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oFingerSize = pcbnew.wxSize(oew/2, h-oew-iew-2*clearance-oew)
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iFingerSize = pcbnew.wxSize(iew,h-2*oew-2*clearance)
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#horizontal inner electrode trace
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self.module.Add(self.smdRectPad(self.module,pcbnew.wxSize(w-2*oBorderWidth-2*clearance,iew), pcbnew.wxPoint(0,h/2-oew-clearance-iew/2),str(2)))
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for i in range(0,oFingerCount):
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#inner electrode fingers
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self.module.Add(self.smdRectPad(self.module,iFingerSize, pcbnew.wxPoint(xPos-iew/2 ,0),str(2)))
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#outer electrode fingers
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self.module.Add(self.smdRectPad(self.module,oFingerSize, pcbnew.wxPoint(xPos+oew*0.75,-w/h-oew-iew/2+oew/2),str(1)))
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xPos += oew*1.5+iew
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#rightmost inner electrode finger
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self.module.Add(self.smdRectPad(self.module,iFingerSize, pcbnew.wxPoint(xPos-iew/2,0),str(2)))
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textSize = self.GetTextSize()
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self.draw.Value(0, h/2+textSize, textSize)
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self.draw.Reference(0, -h/2-textSize, textSize)
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#optionally draw silkscreen line around button
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if(drawBox):
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self.draw.Box(0,0,w,h)
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MutualcapButtonWizard().register()
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