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modules/qfp-gen.fpd: QFP modules generated from IPC-7351 formulas (WIP)

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Known issues:
- the dimensions don't look quite right yet. Especially clearance
  between pads is insufficient.
- results need rounding
- the design is a bit too efficient for its own good: several
  measurements aren't possible. Maybe split sides into different
  frames.
This commit is contained in:
Werner Almesberger 2012-05-29 01:29:49 -03:00
parent 6c2655c5bc
commit 6a242723fb
1 changed files with 84 additions and 0 deletions
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/* MACHINE-GENERATED ! */
frame land {
table
{ dx, dy, n }
{ 0, -1, i }
{ 1, 0, i+N/4 }
{ 0, 1, i+N/2 }
{ -1, 0, i+3*N/4 }
set side = e*(i-N/8-0.5)
table
{ sx, sy }
{ side*-dy, side*dx }
table
{ ix, iy, ox, oy, wx, wy }
{ Gmin/2*dx, Gmin/2*dy, Zmax/2*dx, Zmax/2*dy, Xmax*-dy, Xmax*dx }
loop i = 1, N/4
__0: vec @(ix, iy)
__1: vec .(sx, sy)
__2: vec .(ox-ix, oy-iy)
__4: vec .(wx/2, wy/2)
__3: vec __1(-wx/2, -wy/2)
pad "?" . __4
__5: vec @((ix+ox)/2, (iy+oy)/2)
}
package "QFP$N-$pkg-$dens"
unit mm
table
{ pkg, N, Dmin, Dmax, D1max, Lmin, Lmax, e, narrow, bmin, bmax, b1min, b1max }
{ "MS026BBA", 32, 8.9mm, 9.1mm, 7.1mm, 0.45mm, 0.75mm, 0.8mm, 0, 0.3mm, 0.45mm, 0.3mm, 0.4mm }
{ "MS026BBC", 48, 8.9mm, 9.1mm, 7.1mm, 0.45mm, 0.75mm, 0.5mm, 1, 0.17mm, 0.27mm, 0.17mm, 0.23mm }
table
{ Dtol, Ltol }
{ Dmax-Dmin, Lmax-Lmin }
table
{ Smin, Cs, Smax }
{ Dmin-2*Lmax, sqrt(Dtol*Dtol+Ltol*Ltol), Smin+Cs }
set Cl = Dmax-Dmin
set Cw = b1max-b1min
table
{ dens, ?narrow, Jt, Jh, Js, Court }
{ "A", 0, 0.55mm, 0.45mm, 0.05mm, 0.5mm }
{ "B", 0, 0.35mm, 0.35mm, 0.03mm, 0.25mm }
{ "C", 0, 0.15mm, 0.25mm, 0.01mm, 0.1mm }
{ "A", 1, 0.55mm, 0.45mm, 0.01mm, 0.5mm }
{ "B", 1, 0.35mm, 0.35mm, -0.02mm, 0.25mm }
{ "C", 1, 0.15mm, 0.25mm, -0.04mm, 0.1mm }
table
{ ?narrow, Jt_round, Jh_round, Js_round }
{ 0, 0.02mm, 0.02mm, 0.01mm }
{ 1, 0.02mm, 0.1mm, 0.01mm }
set pcb_tolerance = 0.1mm
set placement_tolerance = 0.1mm
table
{ F, P }
{ pcb_tolerance, placement_tolerance }
set Zmax = Dmin+2*Jt+sqrt(Cl*Cl+F*F+P*P)
set Gmin = Smax-2*Jh-sqrt(Cs*Cs+F*F+P*P)
set Xmax = b1min+2*Js+sqrt(Cw*Cw+F*F+P*P)
frame land @
measy land.__2 -> land.__1 1mm
measy land.__0 >> land.__0
measy land.__2 >> land.__4 4mm
measy land.__5 >> land.__5 6mm