1. \documentclass[a4paper,12pt]{scrartcl}
2. \usepackage[utf8]{inputenc}
3. \usepackage[T1]{fontenc}
4. \usepackage{cmbright}
5. \usepackage[left=1cm]{geometry}
6.  
7. \usepackage{tikz}
8. \usetikzlibrary{matrix}
9. \usetikzlibrary{arrows}
10. \usetikzlibrary{calc}
11. \usetikzlibrary{shapes.symbols}
12.  
13.  
14. \tikzstyle{block} = [draw,
15.                     rectangle,
16.                     thick,
17.                     minimum width=4.3cm,
18.                     align=center,
19.                     rounded corners]
20. \tikzstyle{outblock} = [block, fill=green!25, draw=green!70!black]
21. \tikzstyle{ucblock}  = [block, fill=brown!50, draw=brown]
22.  
23. \tikzstyle{lin}  = [thick, rounded corners]
24. \tikzstyle{outc} = [lin, -triangle 45]
25. \tikzstyle{inc}  = [lin, triangle 45-]
26. \tikzstyle{ioc}  = [lin, triangle 45-triangle 45]
27.  
28. \tikzstyle{vcc} = [-open triangle 90, thick]
29.  
30. \begin{document}
31. \newcommand{\comptxt}[3]{%
32.     \footnotesize #1 \\
33.     #2 \\
34.     \footnotesize #3
35. }
36. \newcommand{\vcc}[2]{%
37.     \coordinate (arrowpeak-#1) at ($(#1.north) + (-3\hpitch,5mm)$);
38.     \draw [vcc]
39.         ($(#1.north) + (-3\hpitch,0)$)
40.         -- node [right, pos=1.2] {\llabel{#2}}
41.        (arrowpeak-#1);
42. }
43. \newcommand{\vccalt}[2]{%
44.     \draw [vcc]
45.         ($(#1.north) + (3\hpitch,0)$)
46.         -- node [right, pos=1.2] {\llabel{#2}}
47.        ($(#1.north) + (3\hpitch,5mm)$);
48. }
49.  
50. \newcommand{\llabel}[1]{\scriptsize#1}
51. \newcommand{\IIC}{I$^2$C}
52. \newlength{\hpitch}
53. \setlength{\hpitch}{6mm}
54. \newlength{\vpitch}
55. \setlength{\vpitch}{3mm}
56.  
57. \begin{tikzpicture}
58.     %%% Blocks %%%
59.     \matrix [row sep=1cm, column sep=1.5cm] {
60.        \node[outblock] (bat)   {\comptxt{Power Supply}{3V Lithium Battery}{}}; &
61.        &
62.        \node[block]    (boost) {\comptxt{3.3V Boostconverter}{TPS61025}{}}; \\
63.         %%%%%%%%%%%%%%%
64.         \node[block]    (ntx)   {\comptxt{434\,MHz TX}{NTX2 433\,MHz}{Or RFM-228 (SPI)}}; &
65.        &
66.        \node[block]    (osc)   {\comptxt{Oscillator}{9.216\,MHz Crystal}{}}; \\
67.         %%%%%%%%%%%%%%%
68.         \node[block]    (xbee)  {\comptxt{868\,MHz TX/RX}{XBee 868\,MHz}{}}; &
69.        &
70.        \node[block]    (swi)   {\comptxt{silicon switch}{TS5A5624}{disable \IIC{}}}; \\
71.         %%%%%%%%%%%%%%%
72.         \node[block]    (flash) {\comptxt{256\,Mbit flash}{S25FL256SAGNFI001}{}}; &
73.        \node[ucblock]  (uc)    {\comptxt{Microcontroller}{ATmega1281}{}}; &
74.        \node[block]    (mux)   {\comptxt{\IIC{} Mux/Conv.}{PCA9540}{}}; \\
75.         %%%%%%%%%%%%%%%
76.         \node[outblock] (beep)  {\comptxt{Alarm}{Beeper}{+ Driver}}; &
77.        &
78.        \node[block]    (9dof)  {\comptxt{Motion Sensors}{9DOF-Board}{}}; \\
79.         %%%%%%%%%%%%%%%
80.         \node[block]    (gps)   {\comptxt{GPS RX}{MAX-6Q}{}}; &
81.        &
82.        \node[block]    (temp)  {\comptxt{Temp./Hum.}{SHT25}{}}; \\
83.         %%%%%%%%%%%%%%%
84.         \node[block]    (cfg)   {\comptxt{config memory}{4K EEPROM}{}}; &
85.        &
86.        \node[outblock] (temp2) {\comptxt{Temp./Hum.}{SHT25}{}}; \\
87.         %%%%%%%%%%%%%%%
88.         \node[block]    (inout) {\comptxt{Input/Output Debug}{LEDs + DIP-switches}{}}; &
89.        &
90.        \node[block]    (press) {\comptxt{pressure sensor}{SSCMNNN015PA2A3}{}}; \\
91.    };
92.  
93.     %%% Lines %%%
94.     %% Left side to uC
95.     % Battery - Boost converter
96.     \draw [outc]
97.         ($(bat.east) + (0,\vpitch)$)
98.         -- node [above] {\llabel{U$_{bat}$}}
99.         ($(boost.west) + (0, \vpitch)$);
100.     % NTX2 - uC
101.     \draw [inc]
102.         (ntx)
103.         -| node [above, near start] {\llabel{PWM 3.3V}}
104.         (uc.north);
105.     % XBee - uC
106.     \draw [ioc]
107.         (xbee)
108.         -| node [above, near start] {\llabel{UART 3.3V}}
109.         ($(uc.north) - (\hpitch,0)$);
110.     % Flash - uC
111.     \draw [ioc]
112.         (flash)
113.         -- node [above=2pt] {\llabel{SPI 3.3V}}
114.         (uc.west);
115.     % Beeper - uC
116.     \draw [ioc]
117.         (beep)
118.         -| node [above, near start] {\llabel{\IIC{} 3.3V}}
119.         ($(uc.south) - (1\hpitch,0)$);
120.     % GPS - uC (UART)
121.     \draw [ioc]
122.         ($(gps.east) + (0,\vpitch)$)
123.         -| node [above, near start] {\llabel{UART 3.3V}}
124.         ($(uc.south) + (0\hpitch,0)$);
125.     % GPS - uC (I/O)
126.     \draw [outc]
127.         ($(gps.east) - (0,\vpitch)$)
128.         -| node [below, near start] {\llabel{I/O 3.3V}}
129.         ($(uc.south) + (1\hpitch,0)$);
130.     % GPS - config memory
131.     \draw [ioc]
132.         (gps)
133.         -- node [right] {\llabel{\IIC{} 3.3V}}
134.         (cfg);
135.     % I/O Debug - uC
136.     \draw [ioc]
137.         (inout)
138.         -| node [above, near start] {\llabel{I/O 3.3V}}
139.         ($(uc.south) + (2\hpitch,0)$);
140.  
141.     %% Right side - uC
142.     % Boost to uC
143.     \draw [ioc]
144.         ($(boost.west) - (0,\vpitch)$)
145.         -| node [below, near start] {\llabel{I/O 3.3V}}
146.         ($(uc.north) + (1\hpitch,0)$);
147.     % Oscillator - uC
148.     \draw [outc]
149.         (osc)
150.         -| ($(uc.north) + (2\hpitch,0)$);
151.     % silicon switch - uC
152.     \draw [ioc]
153.         (swi)
154.         -| node [above, near start] {\llabel{I/O 3.3V}}
155.         ($(uc.north) + (3\hpitch,0)$);
156.  
157.     %% I2C bus
158.     \draw [ioc]
159.         (mux)
160.         -- (uc.east);
161.     \coordinate (i2c1) at ($(uc.east)!0.5!(mux.west)$);
162.     \coordinate (i2c2) at (i2c1 |- 9dof);
163.     \draw [outc] (i2c1)
164.         -- (i2c2)
165.         -- (9dof);
166.     \draw [outc] (i2c2)
167.         |- node [left, very near start] {\llabel{\IIC{} 3.3V}}
168.         (press);
169.  
170.     %% SHT25 to mux/conv
171.     \draw[inc]
172.         ($(mux.east) - (0,\vpitch)$)
173.         -- ($(mux.east) + (\hpitch,-\vpitch)$)
174.         |- node [left, very near start] {\llabel{\IIC{} 3.3V}}
175.        (temp);
176.    \draw [inc]
177.        ($(mux.east) + (0,\vpitch)$)
178.        -- ($(mux.east) + (2\hpitch,\vpitch)$)
179.        |- node [auto] {\llabel{\IIC{} 3.3V}}
180.         (temp2);
181.  
182.     %% Serial port
183.     \coordinate (serialend) at ($(xbee.east) + (1.5,-8mm)$);
184.     \coordinate (xbeetmp) at ($(uc.north) - (\hpitch,0)$);
185.     \coordinate (serialstart) at (xbeetmp |- serialend);
186.     \draw ($(serialend) - (0.7mm,0)$) circle (0.7mm);
187.     \draw[lin]
188.         (serialstart)
189.         -- node [above] {\llabel{SERIAL}}
190.         (serialend);
191.  
192.     %%% Power supplies %%%
193.     \foreach \dev in {ntx,xbee,flash,gps,cfg,inout,boost,uc}{
194.        \vcc{\dev}{3.3V}
195.    }
196.    \vccalt{swi}{3.3V}
197.    \foreach \dev in {swi,mux,9dof,temp,temp2,press}{
198.        \vcc{\dev}{3.3V\_\IIC{}}
199.    }
200.  
201.     %%% Antennas %%%
202.     \coordinate (antoffset) at ($(ntx.west) + (-7mm,0)$);
203.     \foreach \dev in {ntx,xbee,gps}{
204.        \draw[thick]
205.            (antoffset |- \dev.north)
206.            -- (antoffset |- arrowpeak-\dev)
207.            +(-1.5mm,0mm) -- +(0mm,-2.5mm)
208.            +(1.5mm,0mm) -- +(0mm,-2.5mm)
209.            -- (antoffset |- \dev)
210.            -- (\dev.west);
211.    }
212.  
213.     %%% Legend %%%
214.     \filldraw[draw=green!50!black, fill=green!25, rounded corners]
215.         ($(cfg.south east) + (5mm,0mm)$)
216.         rectangle +(8mm,8mm)
217.         ($(cfg.south east) + (15mm,4mm)$)
218.         node [right, align=center] {externe \\ Komponenten};
219. \end{tikzpicture}
220.  
221. \end{document}