2 # Copyright 2022 by Bdale Garbee <bdale@gag.com>. GPLv3
4 # Program to emit PCB footprint for LGA 16 such as Bosch BMI088
7 # dimensions in mm from BMI088.pdf
10 PinHeight = 0.475 + 0.2
12 RowCenters = 2.33 # center to center rows of pad
13 RowSpacing = RowCenters - PinHeight
14 EndCenters = 3.83 # center to center of pads on ends
15 EndSpacing = EndCenters - PinHeight
16 MaskWidth = PinWidth + 0.1
22 # we're going to use the 1/100 of a mil fundamental unit form
24 return int( mm / 25.4 * 1000.0 * 100.0 + 0.5 )
26 print '# author: Bdale Garbee'
27 print '# email: bdale@gag.com'
28 print '# dist-license: GPL 3'
29 print '# use-license: unlimited'
31 print 'Element[0x0 "lga16" "" "" 0 0 -10161 -12011 0 100 0x0]'
33 for pin in range (0,7):
35 mm2mils100((pin-3) * PinSpacing), \
36 mm2mils100(-(RowSpacing/2 + PinWidth/2)), \
37 mm2mils100((pin-3) * PinSpacing), \
38 mm2mils100(-(RowSpacing/2 + PinHeight - PinWidth/2)), \
39 mm2mils100(PinWidth), \
40 mm2mils100(PinSpacing - PinWidth), \
41 mm2mils100(MaskWidth), \
42 '"pin%i"' % (15 - pin), '"%i"' % (15 - pin), '0x0100]'
45 mm2mils100((pin-3) * PinSpacing), \
46 mm2mils100(RowSpacing/2 + PinWidth/2), \
47 mm2mils100((pin-3) * PinSpacing), \
48 mm2mils100(RowSpacing/2 + PinHeight - PinWidth/2), \
49 mm2mils100(PinWidth), \
50 mm2mils100(PinSpacing - PinWidth), \
51 mm2mils100(MaskWidth), \
52 '"pin%i"' % (1 + pin), '"%i"' % (1 + pin), '0x0100]'
55 mm2mils100(EndSpacing/2 + PinWidth/2), \
57 mm2mils100(EndSpacing/2 + PinHeight - PinWidth/2), \
59 mm2mils100(PinWidth), \
60 mm2mils100(PinSpacing - PinWidth), \
61 mm2mils100(MaskWidth), \
62 '"pin%i"' % 8, '"%i"' % 8, '0x0100]'
65 -mm2mils100(EndSpacing/2 + PinWidth/2), \
67 -mm2mils100(EndSpacing/2 + PinHeight - PinWidth/2), \
69 mm2mils100(PinWidth), \
70 mm2mils100(PinSpacing - PinWidth), \
71 mm2mils100(MaskWidth), \
72 '"pin%i"' % 16, '"%i"' % 16, '0x0100]'
74 print ' ElementLine[',\
75 mm2mils100(-BodyHeight/2), \
76 mm2mils100(-BodyWidth/2), \
77 mm2mils100(-BodyHeight/2), \
78 mm2mils100( BodyWidth/2), \
81 print ' ElementLine[',\
82 mm2mils100(-BodyHeight/2), \
83 mm2mils100( BodyWidth/2), \
84 mm2mils100( BodyHeight/2), \
85 mm2mils100( BodyWidth/2), \
88 print ' ElementLine[',\
89 mm2mils100( BodyHeight/2), \
90 mm2mils100( BodyWidth/2), \
91 mm2mils100( BodyHeight/2), \
92 mm2mils100(-BodyWidth/2), \
95 print ' ElementLine[',\
96 mm2mils100( BodyHeight/2), \
97 mm2mils100(-BodyWidth/2), \
98 mm2mils100(-BodyHeight/2), \
99 mm2mils100(-BodyWidth/2), \
102 print ' ElementArc[',\
103 mm2mils100(-3.5 * PinSpacing), \
104 mm2mils100(1.2 * RowSpacing), \
105 '500 500 0 360 1000 ]'