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#lang racket
(define cols 12)
(define rows 4)
(define x-offset 20)
(define y-offset 20)
(define spacing 19)
(define angle 10)
(define column-offsets '(8 5 0 6 11 59 59 11 6 0 5 8))
(define (switch-module x y rotation label net-pos net-neg)
;; TODO: set timestamps?
`(module MX_FLIP (layer Front) (tedit 4FD81CDD) (tstamp 543EF801)
(at ,x ,y ,rotation)
(path /543DB910) ; TODO: this is not documented; no idea what it does
(fp_text reference ,label (at 0 3.302 ,rotation) (layer F.SilkS)
(effects (font (size 1.524 1.778) (thickness 0.254))))
(fp_line (start -6.35 -6.35) (end 6.35 -6.35)
(layer F.SilkS) (width 0.381))
(fp_line (start 6.35 -6.35) (end 6.35 6.35)
(layer F.SilkS) (width 0.381))
(fp_line (start 6.35 6.35) (end -6.35 6.35)
(layer F.SilkS) (width 0.381))
(fp_line (start -6.35 6.35) (end -6.35 -6.35)
(layer F.SilkS) (width 0.381))
(pad 0 np_thru_hole circle (at 0 0) (size 3.9878 3.9878)
(drill 3.9878)) ; switch hole, no copper
(pad 0 np_thru_hole circle (at -5.08 0) (size 1.7018 1.7018)
(drill 1.7018)) ; board-mount hole, no copper
(pad 0 np_thru_hole circle (at 5.08 0) (size 1.7018 1.7018)
(drill 1.7018)) ; board-mount hole, no copper
(pad 1 thru_hole circle (at 2.54 -5.08) (size 2.286 2.286) (drill 1.4986)
(layers *.Cu *.SilkS *.Mask) ,net-pos)
(pad 1 thru_hole circle (at 3.81 -2.54) (size 2.286 2.286) (drill 1.4986)
(layers *.Cu *.SilkS *.Mask) ,net-pos)
(pad 2 thru_hole circle (at -2.54 -5.08) (size 2.286 2.286) (drill 1.4986)
(layers *.Cu *.SilkS *.Mask) ,net-neg)
(pad 2 thru_hole circle (at -3.81 -2.54) (size 2.286 2.286) (drill 1.4986)
(layers *.Cu *.SilkS *.Mask) ,net-neg)))
(define (diode-module x y rotation label net-pos net-neg)
`(module DIODE (layer Front) (tedit 4E0F7A99) (tstamp 543EF854)
(at ,x ,y ,(+ 90 rotation))
(path /543DB90F)
(fp_text reference D2:2 (at 0 0 180) (layer F.SilkS) hide
(effects (font (size 1.016 1.016) (thickness 0.2032))))
(fp_line (start -1.524 -1.143) (end 1.524 -1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start 1.524 -1.143) (end 1.524 1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start 0 -1.143) (end 0 1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start 0 -1.143) (end -1.524 0)
(layer F.SilkS) (width 0.2032))
(fp_line (start -1.524 0) (end 0 1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start 1.524 1.143) (end -1.524 1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start -1.524 1.143) (end -1.524 -1.143)
(layer F.SilkS) (width 0.2032))
(fp_line (start -3.81 0) (end -1.6637 0) (layer Back) (width 0.6096))
(fp_line (start 1.6637 0) (end 3.81 0) (layer Back) (width 0.6096))
(fp_line (start -3.81 0) (end -1.6637 0) (layer Front) (width 0.6096))
(fp_line (start 1.6637 0) (end 3.81 0) (layer Front) (width 0.6096))
(pad 1 thru_hole circle (at -3.81 0 180) (size 1.651 1.651)
(drill 0.9906) (layers *.Cu *.SilkS *.Mask) ,net-neg)
(pad 2 thru_hole rect (at 3.81 0 ,rotation) (size 1.651 1.651)
(drill 0.9906) (layers *.Cu *.SilkS *.Mask) ,net-pos)
(pad 99 smd rect (at -1.6637 0 ,rotation) (size 0.8382 0.8382)
(layers Front F.Paste F.Mask))
(pad 99 smd rect (at -1.6637 0 ,rotation) (size 0.8382 0.8382)
(layers Back B.Paste B.Mask))
(pad 99 smd rect (at 1.6637 0 ,rotation) (size 0.8382 0.8382)
(layers Front F.Paste F.Mask))
(pad 99 smd rect (at 1.6637 0 ,rotation) (size 0.8382 0.8382)
(layers Back B.Paste B.Mask))))
(define microcontroller-module
`(module A_STAR (layer Front) (tedit 4FDC31C8) (tstamp 543EF800)
(at 134 70 270)
(path /543EEB02)
(fp_text value A-STAR (at -3 0 270) (layer F.SilkS)
(effects (font (size 3.048 2.54) (thickness 0.4572))))
(fp_line (start -15.24 7.62) (end 10.1 7.62) (layer F.SilkS) (width 0.381))
(fp_line (start 10.1 7.62) (end 10.1 -7.62) (layer F.SilkS) (width 0.381))
(fp_line (start 10.1 -7.62) (end -15.24 -7.62) (layer F.SilkS) (width 0.381))
(pad B5 thru_hole circle (at -13.97 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 7 N-col-2))
(pad B4 thru_hole circle (at -11.43 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 8 N-col-3))
(pad E6 thru_hole circle (at -8.89 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 9 N-col-4))
(pad D7 thru_hole circle (at -6.35 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 5 N-col-0))
(pad C6 thru_hole circle (at -3.81 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 6 N-col-1))
(pad D4 thru_hole circle (at -1.27 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 10 N-col-5))
(pad D0 thru_hole circle (at 1.27 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 1 N-row-0))
(pad D1 thru_hole circle (at 3.81 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 2 N-row-1))
(pad D3 thru_hole circle (at 6.35 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 3 N-row-2))
(pad D2 thru_hole circle (at 8.89 6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 4 N-row-3))
(pad F7 thru_hole circle (at -13.97 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 13 N-col-8))
(pad F6 thru_hole circle (at -11.43 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 12 N-col-7))
(pad B6 thru_hole circle (at -8.89 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 11 N-col-6))
(pad B7 thru_hole circle (at -6.35 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 15 N-col-10))
(pad D6 thru_hole circle (at -3.81 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 14 N-col-9))
(pad RST thru_hole circle (at -1.27 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 0 ""))
(pad GND thru_hole circle (at 6.35 -6.35 270) (size 1.7526 1.7526)
(drill 1.0922) (layers *.Cu *.SilkS *.Mask) (net 0 ""))))
(define nets
`((net 0 "")
(net 1 N-row-0)
(net 2 N-row-1)
(net 3 N-row-2)
(net 4 N-row-3)
(net 5 N-col-0)
(net 6 N-col-1)
(net 7 N-col-2)
(net 8 N-col-3)
(net 9 N-col-4)
(net 10 N-col-5)
(net 11 N-col-6)
(net 12 N-col-7)
(net 13 N-col-8)
(net 14 N-col-9)
(net 15 N-col-10)
,@(for/list ([s (in-range 42)])
(list 'net (+ 16 s) (string->symbol (format "N-diode-~s" s))))))
(define (net-class nets)
(append '(net_class Default "This is the default net class."
(clearance 0.254)
(trace_width 0.2032)
(via_dia 0.889)
(via_drill 0.635)
(uvia_dia 0.508)
(uvia_drill 0.127))
(for/list ([n nets])
(list 'add_net (last n)))))
(define (switch row col)
(let* ([left? (< col 6)]
[rotation (if left? -10 10)]
[x (* (+ 1 col) spacing)]
[y (+ (list-ref column-offsets col) (* spacing row))]
[hypotenuse (sqrt (+ (* x x) (* y y)))]
[Θ (atan (/ y x))]
[Θ′ (- Θ (degrees->radians rotation))]
[x′ (+ (if left? x-offset 5) (* hypotenuse (cos Θ′)))]
[y′ (+ (if left? y-offset (+ y-offset 42.885)) (* hypotenuse (sin Θ′)))]
[label (format "SW~a:~a" col row)]
[diode (+ row (* col 4))]
;; if we try to number nets linearly, kicad segfaults; woo!
;; so we re-use the nets we skipped with the missing col 5/6 diodes
[diode (cond [(> diode 44) (- diode 20)]
[(> diode 41) (- diode 21)]
[true diode])]
[net-col (if left? col (- col 1))]
[diode-net `(net ,(+ 16 diode)
,(string->symbol (format "N-diode-~s" diode)))]
[column-net `(net ,(+ net-col 5)
,(string->symbol (format "N-col-~s" net-col)))]
;; rotate middle keys additional 90° after calculating position
[rotation (cond [(= 5 col) 80]
[(= 6 col) 280]
[true rotation])])
(switch-module x′ y′ rotation label
(if left? diode-net column-net)
(if left? column-net diode-net))))
(define (diode row col)
(let* ([left? (< col 6)]
[rotation (if left? -10 10)]
[x (* (+ 1 col) spacing)]
[y (+ (list-ref column-offsets col) (* spacing row))]
[hypotenuse (sqrt (+ (* x x) (* y y)))]
[Θ (atan (/ y x))]
[Θ′ (- Θ (degrees->radians rotation))]
[x′ (+ (if left? x-offset 5) (* hypotenuse (cos Θ′))
(if left? 9 -9))]
[y′ (+ (if left? y-offset (+ y-offset 42.885))
(* hypotenuse (sin Θ′)))]
[label (format "D~a:~a" col row)]
[diode (+ row (* col 4))]
;; if we try to number nets linearly, kicad segfaults; woo!
;; so we re-use the nets we skipped with the missing col 5/6 diodes
[diode (cond [(> diode 44) (- diode 20)]
[(> diode 41) (- diode 21)]
[true diode])]
[net-row (cond [(= col 5) 2]
[(= col 6) 3]
[true row])])
(diode-module x′ y′ rotation label
`(net ,(+ 16 diode)
,(string->symbol (format "N-diode-~s" diode)))
`(net ,(+ net-row 1)
,(string->symbol (format "N-row-~s" net-row))))))
(define switches+diodes
(for/list ([col (in-range cols)]
#:when true
[row (if (or (= 5 col) (= 6 col))
'(0) (in-range rows))])
(list (switch row col) (diode row col))))
(define edge-cuts
(for/list [(s '([31 22] [84 22] [127 30] [127 54] [130 54] [130 60] [138 60]
[138 54] [141 54] [141 30] [185 22]
[237 22] [250 95] [161 112] [107 112] [18 95]))
(e '([84 22] [127 30] [127 54] [130 54] [130 60] [138 60] [138 54]
[141 54] [141 30] [185 22]
[237 22] [250 95] [161 112] [107 112] [18 95] [31 22]))]
`(gr_line (start ,@s) (end ,@e) (angle 90) (layer Edge.Cuts) (width 0.3))))
(define board
(apply append nets
(list (net-class nets))
(list microcontroller-module)
edge-cuts
switches+diodes))
(define (write-placement filename)
(when (file-exists? filename) (delete-file filename))
(call-with-output-file filename
(λ (op)
(display (call-with-input-file "header.rktd"
(curry read-string 9999)) op)
;; kicad has this terrible bug where it's whitespace-sensitive here =(
(display "\n" op)
(for ([f board])
(pretty-print f op 1))
(display (call-with-input-file "traces.rktd"
(curry read-string 999999)) op)
(display ")" op))))
(write-placement "atreus.kicad_pcb")