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#N canvas 188 22 632 673 10;
#X floatatom 7 380 5 0 0 0 - - -;
#X floatatom 71 348 5 0 0 0 - - -;
#X floatatom 136 323 5 0 0 0 - - -;
#X obj 7 34 tgl 15 0 empty empty empty 17 7 0 10 -24198 -1 -1 0 1;
#X text 215 206 * my system resets the owner of the printer port to
'root.lp' so I need to issue as root 'chown myuser.lp';
#X text 215 50 * you will need : a paper clip (or a 'high tech' solid
core 22-18 awg wire) an led a button;
#X text 215 176 * consult http://en.wikipedia.org/wiki/Parallel_Port
for the pinouts + more;
#X text 215 255 7 6 5 4 3 2 1 0 bit number;
#X text 215 269 9 8 7 6 5 4 3 2 pin number;
#X text 215 237 layout of bit to pin numbers;
#X text 18 32 <-- This will send a 0 or a 1 to the first pin;
#X text 14 243 Will accept values from 0-255;
#X obj 7 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0 1
;
#X obj 26 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0 1
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#X obj 45 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0 1
;
#X obj 64 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0 1
;
#X obj 83 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0 1
;
#X obj 102 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0
1;
#X obj 121 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0
1;
#X obj 140 132 tgl 15 0 empty empty empty 0 -6 0 8 -260818 -1 -1 0
1;
#X obj 7 229 nbx 5 14 -1e+37 1e+37 0 0 empty empty empty 0 -6 0 10
-241291 -1 -1 0 256;
#X obj 7 191 #fold +;
#X obj 7 210 #to_float;
#X obj 7 172 # << (0 1 2 3 4 5 6 7);
#X obj 7 153 #pack 8 \, \, \, \, \, \, \, \, \, \, \, \, \, \, \, \,
;
#X text 19 274 takes the port as argument;
#X text 44 -1 The cheapest digital i/o interface;
#X obj 7 293 parallel_port /dev/lp0;
#X obj 7 63 metro 1;
#X text 215 286 Flags : PERRORP (active low) \, PSELECD (active high)
\, POUTPA (active high) \, PACK (active low) \, PBUSY (active high)
;
#X obj 0 0 doc_h;
#X text 215 80 1: break the paper clip in two and connect pin 11 (Busy)
to pin 24 (GND) and pin 12 (Paper-Out) to 25 (GND). Those pins are
normally 1 and grounding them opens the port for messages.;
#X text 215 138 2: connect the led between pins 2 (Data0) and 23 (GND)
;
#X text 215 156 3: connect a button between pin 10 and 22 (GND);
#X obj 3 416 doc_c 1;
#X obj 3 478 doc_i 1;
#X obj 14 508 doc_ii 0;
#X obj 14 446 doc_cc 0;
#X obj 0 644 doc_f;
#X text 177 322 parallel port flags;
#X text 110 348 status (pin 10);
#X text 51 379 reserved for future use;
#X obj 3 540 doc_o 3;
#X obj 14 570 doc_oo 0;
#X obj 14 590 doc_oo 1;
#X obj 14 612 doc_oo 2;
#X obj 97 612 doc_m o2 float;
#X obj 97 590 doc_m o1 float;
#X obj 97 570 doc_m o0 <none>;
#X obj 97 508 doc_m i0 float;
#X obj 97 446 doc_m c0 symbol;
#X text 232 446 device name (Linux parallel port interface);
#X text 232 508 bytes to send;
#X text 232 590 status;
#X text 232 612 flags;
#X connect 3 0 28 0;
#X connect 12 0 24 0;
#X connect 13 0 24 1;
#X connect 14 0 24 2;
#X connect 15 0 24 3;
#X connect 16 0 24 4;
#X connect 17 0 24 5;
#X connect 18 0 24 6;
#X connect 19 0 24 7;
#X connect 20 0 27 0;
#X connect 21 0 22 0;
#X connect 22 0 20 0;
#X connect 23 0 21 0;
#X connect 24 0 23 0;
#X connect 27 0 0 0;
#X connect 27 1 1 0;
#X connect 27 2 2 0;
#X connect 28 0 12 0;
#X connect 46 1 54 0;
#X connect 47 1 53 0;
#X connect 49 1 52 0;
#X connect 50 1 51 0;
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