Root/fisl2012/talk.tex

1\documentclass[12pt,trans]{beamer}
2\usepackage{color}
3\usepackage{url}
4\usepackage{colortbl}
5%\usepackage{soul}
6%\usepackage{verbatim}
7\usefonttheme{structurebold}
8\setbeamertemplate{navigation symbols}{}
9\setbeamertemplate{items}[ball]
10%\setbeamersize{sidebar width left=-5mm}
11\title{\Large Making Hardware \\ with KiCad and Friends}
12\author{Werner Almesberger \\\url{werner@almesberger.net}}
13\date{July 27, 2012}
14
15%\setul{}{1.5pt}
16
17\begin{document}
18
19\begin{frame}
20\titlepage
21\end{frame}
22
23% --- Overview ----------------------------------------------------------------
24
25\begin{frame}{Overview}
26\begin{itemize}
27  \item KiCad introduction
28  \item Collaborative design in Qi-Hardware
29  \item Tools to improve KiCad
30  \item Workflow overview
31\end{itemize}
32\vskip5mm
33{\small \url{downloads.qi-hardware.com/people/werner/fisl13.pdf}}
34\end{frame}
35
36% --- KiCad Introduction ------------------------------------------------------
37
38\begin{frame}{KiCad}
39\begin{itemize}
40  \item Complete EDA solution
41  \item Free Software: GPL, LGPL
42  \item Development team by Jean-Pierre Charras, \\
43    Dick Hollenbeck, and many others
44  \item C++, wxWidgets
45  \item Multi-platform: Linux, Windows, Mac
46  \item Text files $\rightarrow$ extensible
47\end{itemize}
48
49\vskip5mm
50{\small \url{www.kicad-pcb.org}}
51\end{frame}
52
53% --- Schematics --------------------------------------------------------------
54
55\begin{frame}{KiCad: Schematics}
56\begin{center}
57  \includegraphics[width=1.0\textwidth]{schem.pdf}
58\end{center}
59\end{frame}
60
61% --- Footprints --------------------------------------------------------------
62
63\begin{frame}{KiCad: Footprints}
64\begin{center}
65  \includegraphics[width=1.0\textwidth]{assoc.pdf}
66\end{center}
67\end{frame}
68
69% --- Layout ------------------------------------------------------------------
70
71\begin{frame}{KiCad: Layout}
72\begin{center}
73  \includegraphics[width=1.0\textwidth]{layout.pdf}
74\end{center}
75\end{frame}
76
77% --- Qi-Hardware -------------------------------------------------------------
78
79\begin{frame}{Qi-Hardware}
80Structure and goals:
81\begin{itemize}
82  \item Collection of loosely connected projects
83  \item Informal gathering of like-minded developers
84  \item Copyleft Hardware with Free Software
85  \item Development and manufacturing
86  \item Toolmaking
87\end{itemize}
88
89Products:
90\begin{itemize}
91  \item Ben NanoNote (Handheld computer)
92  \item Ben-WPAN (IEEE 802.15.4 wireless)
93  \item Milkymist One (FPGA-based Video synthesizer)
94\end{itemize}
95
96\vskip2mm
97{\small \url{www.qi-hardware.com}}
98\end{frame}
99
100% --- Collaborative Design ----------------------------------------------------
101
102\begin{frame}{Collaborative Design}
103\begin{itemize}
104  \item Follow other people's work
105  \item Review other people's work (projects and libraries)
106  \item Shared design information
107  \item Shared version control (git)
108  \item Shared procedures and rules
109\end{itemize}
110\end{frame}
111
112% --- KiCad Limitations -------------------------------------------------------
113
114\begin{frame}{KiCad Limitations}
115\begin{itemize}
116  \item No integrated version control system support
117  \item Integration leads to weak peripheral tools
118    \begin{itemize}
119      \item Footprint editor
120      \item Component catalog
121      \item Module catalog
122    \end{itemize}
123  \item No scripting (coming)
124  \item Scattered libraries
125\end{itemize}
126\end{frame}
127
128% --- Qi-Hardware Adaptation --------------------------------------------------
129
130\begin{frame}{Qi-Hardware Adaptation}
131\begin{itemize}
132  \item Keep things simple: only Linux
133  \item Command-line-oriented use
134  \item Extend KiCad with patches
135  \item External scripts/programs
136  \item Own component and module libraries with common rules
137\end{itemize}
138\end{frame}
139
140% --- Libraries ---------------------------------------------------------------
141
142\begin{frame}{Libraries}
143Goals:
144\begin{itemize}
145  \item Consistent naming
146  \item Known origin of design information \\
147     E.g., IPC-7351
148  \item Documented development process
149\end{itemize}
150
151To do:
152\begin{itemize}
153  \item Improve organization
154  \item Better integrate background information
155  \item Reviews !
156\end{itemize}
157
158\vskip4mm
159% URL http://projects.qi-hardware.com/index.php/p/kicad-libs/source/tree/master/components/
160{\small \url{tiny.cc/kicad-libs-components}} \\
161% URL http://projects.qi-hardware.com/index.php/p/kicad-libs/source/tree/master/modules/
162{\small \url{tiny.cc/kicad-libs-modules}}
163\end{frame}
164
165% --- What goes into git ------------------------------------------------------
166
167\begin{frame}{What goes into git}
168KiCad:
169\begin{itemize}
170  \item Project file: {\tt {\em project}.{\color{red}pro}}
171  \item Schematics: {\tt {\em project}.{\color{red}sch}},
172    {\tt {\em subsheet}.{\color{red}sch}}
173  \item Footprint mapping: {\tt {\em project}.{\color{red}cmp}}
174  \item Layout: {\tt {\em project}.{\color{red}brd}}
175\end{itemize}
176
177Qi-Hardware:
178\begin{itemize}
179  \item Makefile ({\tt sch}, {\tt brd}, {\tt fab}, {\tt clean})
180  \item Bookshelf (for dsv)
181  \item Project-local libraries
182\end{itemize}
183\end{frame}
184
185% --- What doesn't ------------------------------------------------------------
186
187\begin{frame}{What doesn't}
188\begin{itemize}
189  \item Netlist: {\tt {\em project}.{\color{red}net}} \\
190    Generated with eeschema from
191    {\tt *.{\color{red}sch}}
192    and
193    {\tt {\em project}.{\color{red}cmp}}
194  \item Caches and backups:
195    {\tt {\em sheet}.{\color{red}bak}},
196    {\tt {\em project}.{\color{red}000}},
197    {\tt {\em project}{\color{red}-cache.lib}}
198  \item Postscript:
199    {\tt {\em project}-{\em sheet}.{\color{red}ps}},
200    {\tt {\em project}-{\em layer}.{\color{red}ps}}
201  \item Gerbers:
202    {\tt {\em project}-{\em layer}.{\color{red}g{\em ??}}}
203  \item BOMs: {\tt {\em project}.{\color{red}lst}},
204    {\tt {\em project}.{\color{red}cvs}}
205  \item Fab outputs: {\tt {\em project}.{\color{red}drl}},
206    {\tt {\em project}.{\color{red}pos}}
207  \item And so on: {\tt {\em project}.{\color{red}cad}},
208    {\tt {\em project}.{\color{red}erc}},
209    {\tt {\em project}.{\color{red}dsn}},
210    {\tt {\em project}.{\color{red}rpt}},
211    {\tt {\em project}.{\color{red}wrl}}, $\ldots$
212\end{itemize}
213\end{frame}
214
215% --- Project File ------------------------------------------------------------
216
217\begin{frame}{Project File ({\tt {\em project}.pro})}
218
219Contains:
220\begin{itemize}
221  \item Project settings
222  \item Lists of libraries
223\end{itemize}
224
225Issues:
226\begin{itemize}
227  \item Local absolute paths
228  \item Default libraries
229  \item Timestamps $\rightarrow$ commit noise
230\end{itemize}
231
232Solution:
233\begin{itemize}
234  \item Maintain paths manually
235  \item {\tt purge} script: \\
236% URL http://projects.qi-hw.com/index.phpp/wernermisc/source/tree/master/bin/purge
237{\small \url{tiny.cc/wernermisc-bin-purge}}
238\end{itemize}
239\end{frame}
240
241% --- Makefile ----------------------------------------------------------------
242
243\begin{frame}[fragile]{Makefile}
244Objectives:
245\begin{itemize}
246  \item Convenience shortcuts
247  \item Combine tools
248  \item Share common procedures
249  \item Avoid mistakes
250\end{itemize}
251
252{\small
253\begin{verbatim}
254front:
255    pcbnew --plot=ps --plot-fill-all-zones \
256       --layers=Front --plot-mirror \
257       $(PROJECT).brd
258    lpr $(PROJECT)-Front.ps
259\end{verbatim}
260}
261\end{frame}
262
263% --- KiCad Command-Line Patches ----------------------------------------------
264
265\begin{frame}{KiCad Command-Line Patches}
266Original hack by Werner Almesberger, clean rewrite by Wolfgang Spraul,
267soon rewrite for scripting.
268\begin{itemize}
269  \item Idea: command-line access to main output functions
270  \item eeschema
271    \begin{itemize}
272      \item Visualization: Postscript (and SVG, DXF)
273      \item BOM $\rightarrow$ BOOM
274      \item Netlist, ERC
275    \end{itemize}
276  \item pcbnew
277    \begin{itemize}
278      \item Fabrication: Gerbers, drill (Excellon), component positions
279      \item Visualization and DIY: Postscript
280      \item Attributes: mirror, size, origin, fill zones, $\ldots$
281    \end{itemize}
282\end{itemize}
283
284\vskip5mm
285% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/kicad-patches/
286{\small \url{tiny.cc/eda-tools-kicad-patches}}
287\end{frame}
288
289% --- Data Sheet Viewer (dsv) -------------------------------------------------
290
291\begin{frame}[fragile]{Data Sheet Viewer (dsv)}
292\begin{itemize}
293  \item Bookshelf: name and aliases $\rightarrow$ PDF or ZIP with PDF
294  \item Download (wget) to local cache
295  \item Hierarchical lookup by name or alias
296  \item Example: \\
297    {\tt dsv avr} $\rightarrow$ ATtiny87 ({\tt doc8265.pdf})
298      $\rightarrow$ xpdf
299\end{itemize}
300
301\vskip5mm
302Bookshelf example:
303
304\begin{verbatim}
305N: attiny87
306A: attiny167
307A: avr
308D: http://www.atmel.com/Images/doc8265.pdf
309\end{verbatim}
310\end{frame}
311
312% --- Data Sheet Viewer (dsv) -------------------------------------------------
313
314\begin{frame}{dsv Motivation}
315\begin{itemize}
316  \item Make sure everybody uses the same data sheet
317    \begin{itemize}
318      \item Same component
319      \item Same manufacturer
320      \item Same data sheet revision
321    \end{itemize}
322  \item Copyright: can't just check in PDF
323  \item Industrial pragmatism: private mail or ``internal'' repository
324  \item Qi-Hardware: share {\tt BOOKSHELF}
325\end{itemize}
326
327\vskip10mm
328% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/dsv/
329{\small \url{tiny.cc/eda-tools-dsv}}
330\end{frame}
331
332% --- Schematics Symbol Catalog ----------------------------------------------
333
334\begin{frame}{Schematics Symbol Catalog}
335\begin{itemize}
336  \item For selection, review
337  \item Hierarchical order with alphabetical index
338  \item Short descriptions and data sheet links \\
339    To do: connect to dsv
340  \item Added value: indicate pin types
341\end{itemize}
342
343\begin{center}
344  \includegraphics[width=1.0\textwidth]{cat-comp.pdf}
345\end{center}
346\end{frame}
347
348% --- Schematics History ------------------------------------------------------
349
350\begin{frame}{Schematics History}
351\begin{itemize}
352  \item Schematics revision history
353  \item {\tt git diff} produces gibberish
354\end{itemize}
355
356\begin{center}
357  \includegraphics[height=4.5cm]{../fisl2011/schhist.png}
358  \qquad
359  \includegraphics[height=4cm]{../fisl2011/USB.png}
360\end{center}
361
362{\small \url{projects.qi-hardware.com/schhist/}}
363\end{frame}
364
365% --- Schematics History (cont'd) ---------------------------------------------
366
367\begin{frame}{Schematics History (cont'd)}
368How it works:
369\begin{itemize}
370  \item Walk git revision history
371  \item Check out project whenever schematics change
372  \item Run eeschema to make Postscript
373  \item Convert to PNG (find diffs, with highlighting) and PDF
374  \item Wrap in HTML
375\end{itemize}
376
377%Issues:
378%\begin{itemize}
379% \item Nasty shell script
380% \item Resource-hungry (partial caching)
381% \item Large schematics get confusing
382% \item Projects spanning multiple repositories
383%\end{itemize}
384\vskip5mm
385% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/schhist/
386{\small \url{tiny.cc/eda-tools-schhist}}
387\end{frame}
388
389% --- Fped --------------------------------------------------------------------
390
391\begin{frame}{Footprint Editor (fped)}
392\begin{center}
393  \includegraphics[height=45mm]{../fisl2011/fped.png}
394\end{center}
395
396\begin{itemize}
397  \item Fully parametric
398  \item Automated repetition (loops, tables, sub-frames)
399  \item GUI or text-based
400  \item Automatic measurements
401  \item Output: KiCad, Postscript, Gnuplot
402\end{itemize}
403\end{frame}
404
405% --- Footprint Catalog ------------------------------------------------------
406
407\begin{frame}{Footprint Catalog}
408\begin{itemize}
409  \item Like schematics symbol catalog, but for footprints
410  \item Added value: measurements, pad types
411\end{itemize}
412
413\begin{center}
414  \includegraphics[width=1.0\textwidth]{cat-mod.pdf}
415\end{center}
416
417% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/genkicat/
418{\small \url{tiny.cc/eda-tools-genkicat}}
419\end{frame}
420
421% --- Layout History ----------------------------------------------------------
422
423\begin{frame}{Layout History}
424\begin{itemize}
425  \item Layout revision history
426  \item To do $\ldots$
427\end{itemize}
428
429\vskip5cm
430%% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/brdhist/
431% {\small \url{tiny.cc/eda-tools-brdhist}}
432\end{frame}
433
434% --- Gerber Renderer ---------------------------------------------------------
435
436\begin{frame}{Gerber Renderer (prettygerbv)}
437\begin{columns}
438  \begin{column}[l]{8.5cm}
439    \begin{itemize}
440      \item ``Photorealistic'' view of PCB
441      \item Combines Gerber (traces, drawings) and Excellon (holes)
442      \item Easy to see issues with solder paste, silk screen,
443        solder mask, $\ldots$
444      \item Uses gerbv for rendering
445    \end{itemize}
446\vskip10mm
447% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/fab/prettygerbv/
448{\small \url{tiny.cc/eda-tools-fab-prettygerbv}}
449% MORE ??
450% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/fab/
451{\small \url{tiny.cc/eda-tools-fab}}
452  \end{column}
453
454  \begin{column}[r]{4cm}
455    \includegraphics[width=3cm]{../fisl2011/atusb-front.png}
456  \end{column}
457\end{columns}
458
459\end{frame}
460
461% --- BOM Processor -----------------------------------------------------------
462
463\begin{frame}{BOM Processor (BOOM)}
464\begin{itemize}
465  \item BOM $\rightarrow$ select components $\rightarrow$ find supplier
466     $\rightarrow$ \\
467     shopping list
468    \begin{itemize}
469      \item Decode product numbers
470      \item Match characteristics (manufacturer part)
471      \item Find part in inventories (distributor part)
472      \item Select best price
473    \end{itemize}
474  \item Work in progress. Rewrite from Perl to C.
475% \item Snag: Digi-Key spider no longer works
476  \item Future: Help with component selection
477\end{itemize}
478\vskip3mm
479% URL http://projects.qi-hardware.com/index.php/p/eda-tools/source/tree/master/b2/
480{\small \url{tiny.cc/eda-tools-b2}}
481\end{frame}
482
483% --- BOOM Data Flow ----------------------------------------------------------
484
485%\begin{frame}{BOOM Data Flow}
486%DRAWING
487%\end{frame}
488
489% --- Schematics Design Rules -------------------------------------------------
490
491\begin{frame}{Schematics Design Rules}
492Work in progress. First compilation by Adam Wang.
493
494\begin{itemize}
495  \item Clean visual representation
496  \item Compatibility with post-processors (e.g., BOOM)
497\end{itemize}
498
499Examples:
500\begin{itemize}
501  \item Value naming (4k7, 10nH, $\ldots$)
502  \item Junction style
503  \item Naming of negated pins (e.g., nRESET)
504  \item Text placement and size
505  \item Checklists for reviews
506\end{itemize}
507
508{\small \url{en.qi-hardware.com/wiki/Rules_on_Editing_Schematics}}
509\end{frame}
510
511% --- Qi-Hardware Workflow ----------------------------------------------------
512
513\begin{frame}{Qi-Hardware Workflow}
514\begin{center}
515  \includegraphics[width=1.0\textwidth]{all.pdf}
516\end{center}
517\end{frame}
518
519% --- Conclusion --------------------------------------------------------------
520
521\begin{frame}{Conclusion}
522Experience this far:
523\begin{itemize}
524  \item KiCad is a good basis for collaborative projects
525  \item Easy to extend, thanks to open design
526  \item Automation makes workflow less intimidating
527\end{itemize}
528
529To do:
530\begin{itemize}
531  \item Spread the word
532  \item Finish BOOM and write brdhist
533  \item Unify meta-data (bookshelf, etc.)
534  \item Improve quality of libraries
535  \item Command-line support in mainline KiCad
536\end{itemize}
537
538\vskip2mm
539{\small \url{projects.qi-hardware.com/}} \\
540{\small \url{downloads.qi-hardware.com/people/werner/fisl13.pdf}}
541\end{frame}
542
543\end{document}
544

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