Exporting KiCad DSN to Text

I finally got round to exporting the DSN file to some intermediate files that are easier to work with:

• pcb.txt
• nets.txt
• parts.txt

The code is rather bloated so later I will try and remove the S-Expr linked list.

The "pcb" file looks like this (units are um):

pcb:
    130810 -95250
    130810 -120650
    175260 -120650
    175260 -95250
    130810 -95250
    130810 -95250

 I can write some code to consider an arbitrary shape but a rectangle is good enough for now.

The "nets":

nets:
    C1-1 D2-1 Q1-2 R2-1 
    C1-2 D1-2 D3-2 D4-2 D5-2 R3-1 
    D1-1 D2-2 
    D3-1 J1-3 
    D4-1 J1-4 
    D5-1 J1-5 
    J1-1 R1-2 R3-2 
    J1-2 Q1-3 R1-1 
    J1-6 Q1-1 R2-2 

The nets will need to be converted into number for the router.

And finally the "pins" or parts:

Component  Surface/Pin           X           Y  Rot
C1               front      154940     -105410  180
                     1           0           0    0
                     2        5000           0    0
D1               front      165100     -110490  180
                     1           0           0    0
                     2        7620           0    0
D2               front      157480     -107950    0
                     1           0           0    0
                     2        7620           0    0
D3               front      139700     -107950    0
                     1           0           0    0
                     2        7620           0    0
D4               front      139700     -110490    0
                     1           0           0    0
                     2        7620           0    0
D5               front      139700     -113030    0
                     1           0           0    0
                     2        7620           0    0
J1               front      135890     -102870    0
                     1           0           0    0
                     2           0       -2540    0
                     3           0       -5080    0
                     4           0       -7620    0
                     5           0      -10160    0
                     6           0      -12700    0
Q1               front      163830     -101600   90
                     2        1270        1270   90
                     3        2540           0   90
                     1           0           0   90
R1               front      147320     -102870  180
                     1           0           0    0
                     2        7620           0    0
R2               front      157480     -105410    0
                     1           0           0    0
                     2        7620           0    0
R3               front      147320     -105410  180
                     1           0           0    0
                     2        7620           0    0

All the pin locations need to be processed (translated and rotated).

The next step is to build the "links" list:

SRC    DST
  1	 7
  7	 8
  2	13
 13	22
  3	 9
  4	10
  5	11
  6	24
 24	25
 12	14
 14	19
 14	15
 15	16
 16	21
 17	18
 18	23
 18	20
 26	27

The then build a "map":

25 20
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  7  0  0  0  0  0 12  0 17  0  0  0  0  0 25  0  0  0  0
0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  2  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  8  0  0  0  0  0 13  0 18  0  0  0  0 22  0  0  0  0  0
0  0  0  0  3  0  0  0  0  0  0  0  0  0  0  0  0  0  0 23  0  0  0  0  0
0  0  0  0  0  0  9  0  0  0  0  0 14  0 19  0  0  0  0 24  0  0  0  0  0
0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0 10  0  0  0  0  0 15  0 20  0  0  0  0  0 26  0  0  0  0
0  0  0  0  5  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0 11  0  0  0  0  0 16  0 21  0  0  0  0  0 27  0  0  0  0
0  0  0  0  6  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0

AlanX