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QFN footprint wizard - Allow different number of pads in x and y directions

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Matus Pavelek 2023-09-04 13:39:28 +00:00 committed by jean-pierre charras
parent 63824487d0
commit d57c5d3ad9
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1 changed files with 35 additions and 22 deletions
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57
pcbnew/python/plugins/qfn_wizard.py
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@ -31,9 +31,8 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
def GenerateParameterList(self):
#TODO - Allow different number of pads in x and y directions
self.AddParam("Pads", "n", self.uInteger, 100, multiple=4, min_value=4)
self.AddParam("Pads", "nx", self.uInteger, 25)
self.AddParam("Pads", "ny", self.uInteger, 25, min_value=1)
self.AddParam("Pads", "pitch", self.uMM, 0.4, designator='e')
self.AddParam("Pads", "width", self.uMM, 0.2, designator='X1')
self.AddParam("Pads", "length", self.uMM, 0.75, designator='Y1')
@ -71,7 +70,7 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
def GetValue(self):
return "QFN-{n}_{ep}{x:g}x{y:g}_Pitch{p:g}mm".format(
n = self.pads['n'],
n = (self.pads['nx'] + self.pads['ny']) * 2,
ep = "EP_" if self.epad['epad'] else '',
x = pcbnew.ToMM(self.package['width']),
y = pcbnew.ToMM(self.package['height']),
@ -89,9 +88,11 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
v_pitch = self.package["height"]
h_pitch = self.package["width"]
pads_per_row = int(self.pads["n"] // 4)
v_pads_per_row = int(self.pads["ny"])
h_pads_per_row = int(self.pads["nx"])
row_len = (pads_per_row - 1) * pad_pitch
v_row_len = (v_pads_per_row - 1) * pad_pitch
h_row_len = (h_pads_per_row - 1) * pad_pitch
pad_shape = pcbnew.PAD_SHAPE_OVAL if self.pads["oval"] else pcbnew.PAD_SHAPE_RECT
@ -100,37 +101,36 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
v_pad = PA.PadMaker(self.module).SMDPad( pad_length, pad_width, shape=pad_shape)
h_pitch = (int)(h_pitch / 2 - pad_length + pad_offset + pad_length/2)
v_pitch = (int)(v_pitch / 2 - pad_length +pad_offset + pad_length/2)
v_pitch = (int)(v_pitch / 2 - pad_length + pad_offset + pad_length/2)
#left row
pin1Pos = pcbnew.VECTOR2I( -h_pitch, 0)
array = PA.PadLineArray(h_pad, pads_per_row, pad_pitch, True, pin1Pos)
array = PA.PadLineArray(h_pad, v_pads_per_row, pad_pitch, True, pin1Pos)
array.SetFirstPadInArray(1)
array.AddPadsToModule(self.draw)
#bottom row
pin1Pos = pcbnew.VECTOR2I(0, v_pitch)
array = PA.PadLineArray(v_pad, pads_per_row, pad_pitch, False, pin1Pos)
array.SetFirstPadInArray(pads_per_row + 1)
array = PA.PadLineArray(v_pad, h_pads_per_row, pad_pitch, False, pin1Pos)
array.SetFirstPadInArray(v_pads_per_row + 1)
array.AddPadsToModule(self.draw)
#right row
pin1Pos = pcbnew.VECTOR2I(h_pitch, 0)
array = PA.PadLineArray(h_pad, pads_per_row, -pad_pitch, True,
array = PA.PadLineArray(h_pad, v_pads_per_row, -pad_pitch, True,
pin1Pos)
array.SetFirstPadInArray(2*pads_per_row + 1)
array.SetFirstPadInArray(v_pads_per_row + h_pads_per_row + 1)
array.AddPadsToModule(self.draw)
#top row
pin1Pos = pcbnew.VECTOR2I(0, -v_pitch)
array = PA.PadLineArray(v_pad, pads_per_row, -pad_pitch, False,
array = PA.PadLineArray(v_pad, h_pads_per_row, -pad_pitch, False,
pin1Pos)
array.SetFirstPadInArray(3*pads_per_row + 1)
array.SetFirstPadInArray(2*v_pads_per_row + h_pads_per_row + 1)
array.AddPadsToModule(self.draw)
lim_x = self.package["width"] / 2
lim_y = self.package["height"] / 2
inner = (row_len / 2) + pad_pitch
# epad
epad_width = self.epad["width"]
@ -144,7 +144,7 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
# Create a central exposed pad?
if self.epad['epad'] == True:
epad_num = self.pads['n'] + 1
epad_num = (self.pads['nx'] + self.pads['ny']) * 2 + 1
aper_pad_w = epad_length / aper_pad_nx
aper_pad_l = epad_width / aper_pad_ny
@ -204,15 +204,28 @@ class QFNWizard(FootprintWizardBase.FootprintWizard):
self.draw.SetLayer( pcbnew.F_SilkS )
offset = self.draw.GetLineThickness()
clip = row_len / 2 + self.pads['pitch']
h_clip = h_row_len / 2 + self.pads['pitch']
v_clip = v_row_len / 2 + self.pads['pitch']
self.draw.SetLineThickness( pcbnew.FromMM( 0.12 ) ) #Default per KLC F5.1 as of 12/2018
self.draw.Polyline( [ [ clip, -h/2-offset], [ w/2+offset,-h/2-offset], [ w/2+offset, -clip] ] ) # top right
self.draw.Polyline( [ [ clip, h/2+offset], [ w/2+offset, h/2+offset], [ w/2+offset, clip] ] ) # bottom right
self.draw.Polyline( [ [-clip, h/2+offset], [-w/2-offset, h/2+offset], [-w/2-offset, clip] ] ) # bottom left
# Add pin-1 indication as per IPC-7351C
self.draw.Line( -clip, -h/2-offset, -w/2-pad_length/2, -h/2-offset )
if h_pads_per_row > 0:
self.draw.Polyline( [ [ h_clip, -h/2-offset], [ w/2+offset,-h/2-offset], [ w/2+offset, -v_clip] ] ) # top right
self.draw.Polyline( [ [ h_clip, h/2+offset], [ w/2+offset, h/2+offset], [ w/2+offset, v_clip] ] ) # bottom right
self.draw.Polyline( [ [-h_clip, h/2+offset], [-w/2-offset, h/2+offset], [-w/2-offset, v_clip] ] ) # bottom left
# Add pin-1 indication as per IPC-7351C
self.draw.Line( -h_clip, -h/2-offset, -w/2-pad_length/2, -h/2-offset )
else:
self.draw.Polyline( [ [-w/2-offset, v_clip], [-w/2-offset, h/2+offset], [ w/2+offset, h/2+offset],
[ w/2+offset, v_clip] ] ) # bottom
# Add pin-1 indication as per IPC-7351C
self.draw.Polyline( [ [-h/2-offset, -h/2-offset], [ w/2+offset,-h/2-offset], [ w/2+offset, -v_clip] ] )
self.draw.SetLineThickness( offset ) #Restore default
# Courtyard