任务10：认知“数码管”的显示原理
本系列教程以AVR单片机为对象，介绍单片机的快速开发方法。
参考教材：《单片机技术及应用项目教程》 栾秋平 电子工业出版社 2019.6 第1版
本文介绍“数码管”的显示原理。
一、认知数码管
1、4位8段共阳极数码管
2、4位8段共阴极数码管
二、数码管的字符编码
1、共阳极数码管字符编码表
|
字符 |
dp |
g |
f |
e |
d |
c |
b |
a |
十六进制 |
|
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0xC0 |
|
1 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0xF9 |
|
2 |
1 |
0 |
1 |
0 |
0 |
1 |
0 |
0 |
0xA4 |
|
3 |
1 |
0 |
1 |
1 |
0 |
0 |
0 |
0 |
0xB0 |
|
4 |
1 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
0x99 |
|
5 |
1 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
0x92 |
|
6 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
0x82 |
|
7 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0 |
0xF8 |
|
8 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0x80 |
|
9 |
1 |
0 |
0 |
1 |
0 |
0 |
0 |
0 |
0x90 |
|
A |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
0x88 |
|
B |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
0x83 |
|
C |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
0xC6 |
|
D |
1 |
0 |
1 |
0 |
0 |
0 |
0 |
1 |
0xA1 |
|
E |
1 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0x86 |
|
F |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
0x8E |
|
H |
1 |
0 |
0 |
0 |
1 |
0 |
0 |
1 |
0x89 |
|
L |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0xC7 |
|
P |
1 |
0 |
0 |
0 |
1 |
1 |
0 |
0 |
0x8C |
|
R |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
0 |
0xCE |
|
U |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
1 |
0xC1 |
|
- |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
0xBF |
|
. |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0x7F |
|
熄灭 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0xFF |
2、共阴极数码管字符编码表
|
字符 |
dp |
g |
f |
e |
d |
c |
b |
a |
十六进制 |
|
0 |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
0x3F |
|
1 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
0x06 |
|
2 |
0 |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
0x5B |
|
3 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
0x4F |
|
4 |
0 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
0x66 |
|
5 |
0 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
0x6D |
|
6 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
0x7D |
|
7 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
0x07 |
|
8 |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
0x7F |
|
9 |
0 |
1 |
1 |
0 |
1 |
1 |
1 |
1 |
0x6F |
|
A |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
0x77 |
|
B |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
0x7C |
|
C |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
1 |
0x39 |
|
D |
0 |
1 |
0 |
1 |
1 |
1 |
1 |
0 |
0x5E |
|
E |
0 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
0x79 |
|
F |
0 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
0x71 |
|
H |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
0 |
0x76 |
|
L |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
0 |
0x38 |
|
P |
0 |
1 |
1 |
1 |
0 |
0 |
1 |
1 |
0x73 |
|
R |
0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
0x31 |
|
U |
0 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
0x3E |
|
- |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0x40 |
|
. |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0x80 |
|
熄灭 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0x00 |
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