193 lines
8.2 KiB
Python
193 lines
8.2 KiB
Python
|
# This program is free software; you can redistribute it and/or modify
|
||
|
|
# it under the terms of the GNU General Public License as published by
|
||
|
|
# the Free Software Foundation; either version 2 of the License, or
|
||
|
|
# (at your option) any later version.
|
||
|
|
#
|
||
|
|
# This program is distributed in the hope that it will be useful,
|
||
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
# GNU General Public License for more details.
|
||
|
|
#
|
||
|
|
# You should have received a copy of the GNU General Public License
|
||
|
|
# along with this program; if not, write to the Free Software
|
||
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
|
|
# MA 02110-1301, USA.
|
||
|
|
#
|
||
|
|
|
||
|
|
from __future__ import division
|
||
|
|
import pcbnew
|
||
|
|
|
||
|
|
import HelpfulFootprintWizardPlugin as HFPW
|
||
|
|
import PadArray as PA
|
||
|
|
|
||
|
|
class QFNWizard(HFPW.HelpfulFootprintWizardPlugin):
|
||
|
|
|
||
|
|
def GetName(self):
|
||
|
|
return "QFN"
|
||
|
|
|
||
|
|
def GetDescription(self):
|
||
|
|
return "Quad Flat No-lead with Exposed Pad footprint wizard"
|
||
|
|
|
||
|
|
def GenerateParameterList(self):
|
||
|
|
self.AddParam("Pads", "n", self.uNatural, 100)
|
||
|
|
self.AddParam("Pads", "pad pitch", self.uMM, 0.5)
|
||
|
|
self.AddParam("Pads", "pad width", self.uMM, 0.25)
|
||
|
|
self.AddParam("Pads", "pad length", self.uMM, 1.5)
|
||
|
|
self.AddParam("Pads", "oval", self.uBool, True)
|
||
|
|
self.AddParam("Pads", "thermal vias", self.uBool, True)
|
||
|
|
self.AddParam("Pads", "thermal vias drill", self.uMM, 0.3)
|
||
|
|
self.AddParam("Pads", "epad subdiv x", self.uNatural, 2)
|
||
|
|
self.AddParam("Pads", "epad subdiv y", self.uNatural, 2)
|
||
|
|
|
||
|
|
self.AddParam("Package", "package width", self.uMM, 14)
|
||
|
|
self.AddParam("Package", "package height", self.uMM, 14)
|
||
|
|
self.AddParam("Package", "courtyard margin", self.uMM, 1)
|
||
|
|
|
||
|
|
def CheckParameters(self):
|
||
|
|
self.CheckParamInt("Pads", "*n", is_multiple_of=4)
|
||
|
|
self.CheckParamBool("Pads", "*oval")
|
||
|
|
self.CheckParamBool("Pads", "*thermal vias")
|
||
|
|
|
||
|
|
def GetValue(self):
|
||
|
|
return "QFN_%d" % self.parameters["Pads"]["*n"]
|
||
|
|
|
||
|
|
def BuildThisFootprint(self):
|
||
|
|
pads = self.parameters["Pads"]
|
||
|
|
|
||
|
|
pad_pitch = pads["pad pitch"]
|
||
|
|
pad_length = pads["pad length"]
|
||
|
|
pad_width = pads["pad width"]
|
||
|
|
|
||
|
|
v_pitch = self.parameters["Package"]["package height"]
|
||
|
|
h_pitch = self.parameters["Package"]["package width"]
|
||
|
|
|
||
|
|
pads_per_row = pads["*n"] // 4
|
||
|
|
|
||
|
|
row_len = (pads_per_row - 1) * pad_pitch
|
||
|
|
|
||
|
|
pad_shape = pcbnew.PAD_SHAPE_OVAL if pads["*oval"] else pcbnew.PAD_SHAPE_RECT
|
||
|
|
|
||
|
|
h_pad = PA.PadMaker(self.module).SMDPad( pad_length, pad_width,
|
||
|
|
shape=pad_shape, rot_degree=90.0)
|
||
|
|
v_pad = PA.PadMaker(self.module).SMDPad( pad_length, pad_width, shape=pad_shape)
|
||
|
|
|
||
|
|
#left row
|
||
|
|
pin1Pos = pcbnew.wxPoint(-h_pitch / 2, 0)
|
||
|
|
array = PA.PadLineArray(h_pad, pads_per_row, pad_pitch, True, pin1Pos)
|
||
|
|
array.SetFirstPadInArray(1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
|
||
|
|
#bottom row
|
||
|
|
pin1Pos = pcbnew.wxPoint(0, v_pitch / 2)
|
||
|
|
array = PA.PadLineArray(v_pad, pads_per_row, pad_pitch, False, pin1Pos)
|
||
|
|
array.SetFirstPadInArray(pads_per_row + 1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
|
||
|
|
#right row
|
||
|
|
pin1Pos = pcbnew.wxPoint(h_pitch / 2, 0)
|
||
|
|
array = PA.PadLineArray(h_pad, pads_per_row, -pad_pitch, True,
|
||
|
|
pin1Pos)
|
||
|
|
array.SetFirstPadInArray(2*pads_per_row + 1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
|
||
|
|
#top row
|
||
|
|
pin1Pos = pcbnew.wxPoint(0, -v_pitch / 2)
|
||
|
|
array = PA.PadLineArray(v_pad, pads_per_row, -pad_pitch, False,
|
||
|
|
pin1Pos)
|
||
|
|
array.SetFirstPadInArray(3*pads_per_row + 1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
|
||
|
|
lim_x = self.parameters["Package"]["package width"] / 2
|
||
|
|
lim_y = self.parameters["Package"]["package height"] / 2
|
||
|
|
inner = (row_len / 2) + pad_pitch
|
||
|
|
|
||
|
|
# epad
|
||
|
|
epad_width = self.parameters["Package"]["package height"] - (2*pad_length)
|
||
|
|
epad_length = self.parameters["Package"]["package width"] - (2*pad_length)
|
||
|
|
epad_subdv_x = pads["*epad subdiv x"]
|
||
|
|
epad_subdv_y = pads["*epad subdiv y"]
|
||
|
|
epad_via_drill = pads["thermal vias drill"]
|
||
|
|
|
||
|
|
if (epad_subdv_y != 0 and epad_subdv_x != 0) and (epad_subdv_y != 1 or epad_subdv_x != 1):
|
||
|
|
# Create the master pad (one area) on front solder mask, and perhaps of front copper layer
|
||
|
|
# at location 0,0
|
||
|
|
emasterpad = PA.PadMaker(self.module).SMDPad( epad_length, epad_width,
|
||
|
|
shape=pcbnew.PAD_SHAPE_RECT, rot_degree=0.0)
|
||
|
|
emasterpad.SetLayerSet(pcbnew.LSET(pcbnew.F_Mask)) # currently, only on solder mask
|
||
|
|
emasterpad.SetPadName(pads["*n"]+1)
|
||
|
|
self.module.Add(emasterpad)
|
||
|
|
|
||
|
|
px = pcbnew.FromMM(0.1); py = pcbnew.FromMM(0.1)
|
||
|
|
esubpad_size_x = epad_length / epad_subdv_x - px
|
||
|
|
esubpad_size_y = epad_width / epad_subdv_y - py
|
||
|
|
epad1_pos = pcbnew.wxPoint(-(esubpad_size_x*(epad_subdv_x-1)/2), -esubpad_size_y*(epad_subdv_y-1)/2)
|
||
|
|
epad = PA.PadMaker(self.module).SMDPad( esubpad_size_y, esubpad_size_x,
|
||
|
|
shape=pcbnew.PAD_SHAPE_RECT, rot_degree=0.0)
|
||
|
|
array = PA.EPADGridArray(epad, epad_subdv_x, epad_subdv_y, esubpad_size_x + px, esubpad_size_y + py, pcbnew.wxPoint(0,0))
|
||
|
|
array.SetFirstPadInArray(pads["*n"]+1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
if pads["*thermal vias"]:
|
||
|
|
via_diam = min(esubpad_size_y, esubpad_size_x)/3.
|
||
|
|
thpad = PA.PadMaker(self.module).THRoundPad(via_diam, min(via_diam/2, epad_via_drill))
|
||
|
|
layerset = pcbnew.LSET.AllCuMask()
|
||
|
|
layerset.AddLayer(pcbnew.B_Mask)
|
||
|
|
layerset.AddLayer(pcbnew.F_Mask)
|
||
|
|
thpad.SetLayerSet(layerset)
|
||
|
|
array2 = PA.EPADGridArray(thpad, epad_subdv_x, epad_subdv_y, esubpad_size_x + px, esubpad_size_y + py, pcbnew.wxPoint(0,0))
|
||
|
|
array2.SetFirstPadInArray(pads["*n"]+1)
|
||
|
|
array2.AddPadsToModule(self.draw)
|
||
|
|
else:
|
||
|
|
epad = PA.PadMaker(self.module).SMDPad(epad_length, epad_width)
|
||
|
|
epad_pos = pcbnew.wxPoint(0,0)
|
||
|
|
array = PA.PadLineArray(epad, 1, 1, False, epad_pos)
|
||
|
|
array.SetFirstPadInArray(pads["*n"]+1)
|
||
|
|
array.AddPadsToModule(self.draw)
|
||
|
|
if pads["*thermal vias"]:
|
||
|
|
via_diam = min(epad_length, epad_width)/3.
|
||
|
|
thpad = PA.PadMaker(self.module).THRoundPad( via_diam, min(via_diam/2, epad_via_drill))
|
||
|
|
layerset = pcbnew.LSET.AllCuMask()
|
||
|
|
layerset.AddLayer(pcbnew.B_Mask)
|
||
|
|
layerset.AddLayer(pcbnew.F_Mask)
|
||
|
|
thpad.SetLayerSet(layerset)
|
||
|
|
array2 = PA.PadLineArray(thpad, 1, 1, False, epad_pos)
|
||
|
|
array2.SetFirstPadInArray(pads["*n"]+1)
|
||
|
|
array2.AddPadsToModule(self.draw)
|
||
|
|
|
||
|
|
#top left - diagonal
|
||
|
|
self.draw.Line(-lim_x, -inner, -inner, -lim_y)
|
||
|
|
# top right
|
||
|
|
self.draw.Polyline([(inner, -lim_y), (lim_x, -lim_y), (lim_x, -inner)])
|
||
|
|
# bottom left
|
||
|
|
self.draw.Polyline([(-inner, lim_y), (-lim_x, lim_y), (-lim_x, inner)])
|
||
|
|
# bottom right
|
||
|
|
self.draw.Polyline([(inner, lim_y), (lim_x, lim_y), (lim_x, inner)])
|
||
|
|
|
||
|
|
# Courtyard
|
||
|
|
cmargin = self.parameters["Package"]["courtyard margin"]
|
||
|
|
self.draw.SetLayer(pcbnew.F_CrtYd)
|
||
|
|
sizex = (lim_x + cmargin) * 2 + pad_length/2.
|
||
|
|
sizey = (lim_y + cmargin) * 2 + pad_length/2.
|
||
|
|
# round size to nearest 0.1mm, rectangle will thus land on a 0.05mm grid
|
||
|
|
sizex = self.PutOnGridMM(sizex, 0.1)
|
||
|
|
sizey = self.PutOnGridMM(sizey, 0.1)
|
||
|
|
# set courtyard line thickness to the one defined in KLC
|
||
|
|
thick = self.draw.GetLineThickness()
|
||
|
|
self.draw.SetLineThickness(pcbnew.FromMM(0.05))
|
||
|
|
self.draw.Box(0, 0, sizex, sizey)
|
||
|
|
# restore line thickness to previous value
|
||
|
|
self.draw.SetLineThickness(pcbnew.FromMM(thick))
|
||
|
|
|
||
|
|
#reference and value
|
||
|
|
text_size = self.GetTextSize() # IPC nominal
|
||
|
|
text_offset = v_pitch / 2 + text_size + pad_length / 2
|
||
|
|
|
||
|
|
self.draw.Value(0, text_offset, text_size)
|
||
|
|
self.draw.Reference(0, -text_offset, text_size)
|
||
|
|
|
||
|
|
# set SMD attribute
|
||
|
|
self.module.SetAttributes(pcbnew.MOD_CMS)
|
||
|
|
|
||
|
|
QFNWizard().register()
|
||
|
|
|
||
|
|
|