September 2024
Intermediate to advanced
798 pages
18h 56m
German
Content preview from Arduino Kochbuch, 3. Auflage
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ASCII und erweiterte Zeichensätze
ASCII steht für American Standard Code for Information Interchange. Es ist die gängigste Art, Buchstaben und Zahlen auf einem Computer darzustellen. Jedes Zeichen wird durch eine Zahl dargestellt - zum Beispiel hat der Buchstabe A den numerischen Wert 65 und der Buchstabe a den numerischen Wert 97 (Kleinbuchstaben haben einen um 32 höheren Wert als ihre Großbuchstabenversionen).
Werte unter 32 werden Steuercodesgenannt - siewurden als nichtdruckende Zeichen definiert, um frühe Computerterminals zu steuern. Die gängigsten Steuercodes für Arduino-Anwendungen sind in Tabelle G-1 aufgeführt.
| Dezimal | Hex | Fluchtcode | Beschreibung |
|---|---|---|---|
|
0 |
0x0 |
|
Null-Zeichen (wird verwendet, um einen C-String zu beenden) |
|
9 |
0x9 |
|
Registerkarte |
|
10 |
0xA |
|
Neue Linie |
|
13 |
0xD |
|
Wagenrücklauf |
|
27 |
0x1B |
Flucht |
Tabelle G-2 zeigt die dezimalen und hexadezimalen Werte der druckbaren ASCII-Zeichen.
| Dez | Hex | Dez | Hex | Dez | Hex | |||
|---|---|---|---|---|---|---|---|---|
|
Raum |
32 |
20 |
@ |
64 |
40 |
` |
96 |
60 |
|
! |
33 |
21 |
A |
65 |
41 |
a |
97 |
61 |
|
" |
34 |
22 |
B |
66 |
42 |
b |
98 |
62 |
|
# |
35 |
23 |
C |
67 |
43 |
c |
99 |
63 |
|
$ |
36 |
24 |
D |
68 |
44 |
d |
100 |
64 |
|
% |
37 |
25 |
E |
69 |
45 |
e |
101 |
65 |
|
& |
38 |
26 |
F |
70 |
46 |
f |
102 |
66 |
|
' |
39 |
27 |
G |
71 |
47 |
g |
103 |
67 |
|
( |
40 |
28 |
H |
72 |
48 |
h |
104 |
68 |
|
) |
41 |
29 |
I |
73 |
49 |
i |
105 |
69 |
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