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标题: 树莓派4B 更新wiringPi库到2.52的方法 [打印本页]
作者: admin 时间: 2020-7-21 15:30
标题: 树莓派4B 更新wiringPi库到2.52的方法
最新发布的树莓派4B在烧录了官方系统buster以后,如果直接使用gpio readall去查看GPIO会出现错误。无法识别的情况,需要根据以下步骤进行wiringPi的更新:
登陆后打开一个终端输入:
- cd /tmp8 k: G2 v5 d) C# L
- wget https://project-downloads.drogon.net/wiringpi-latest.deb. u1 ?+ I( V: X
- sudo dpkg -i wiringpi-latest.deb
复制代码然后再使用
检查版本信息,确保版本为:2.52即可。

然后再执行:gpio readall
i% U. E; b2 x% \4 {/ g- +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----++ j& {1 p8 U, @
- | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
# Q! A+ w w" I* `8 P - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
% X* N7 V5 l$ B1 t+ W3 T1 y - | | | 3.3v | | | 1 || 2 | | | 5v | | |
, Z4 H0 x% ~+ U' J0 w5 D1 R - | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | |
. O3 c: |! ?# L) X, Q - | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | |
! r/ y! d1 _2 D; k$ }& X - | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT0 | TxD | 15 | 14 |; Q. D8 [: u. E+ ?& G/ a0 `8 A
- | | | 0v | | | 9 || 10 | 1 | ALT0 | RxD | 16 | 15 |
- v. h3 S M1 v - | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 |
7 {: x2 e3 ^) K7 ~; n- ?( N - | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | |% @: A( q5 z& a) K% S @
- | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 |
! N5 V+ e. @# D! _ - | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 |
6 u( }/ M2 E! i9 _" [# ]( p9 a - | 10 | 12 | MOSI | IN | 0 | 19 || 20 | | | 0v | | |/ n& e5 ?9 ^7 x. W5 D
- | 9 | 13 | MISO | IN | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 |# e$ D, E2 J) C
- | 11 | 14 | SCLK | OUT | 0 | 23 || 24 | 1 | IN | CE0 | 10 | 8 |2 r2 a; A" l8 ^& B4 B8 Q8 Y8 r& r
- | | | 0v | | | 25 || 26 | 1 | IN | CE1 | 11 | 7 |0 T" r1 F" ]+ k
- | 0 | 30 | SDA.0 | OUT | 0 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 |
/ B7 `: `3 @/ W' q; o - | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | |
8 A$ W: |' o- L/ g0 q: U5 R - | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 |6 v7 [3 b2 N; `+ L# u( b4 t
- | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | |) _3 F$ ? H' q4 i
- | 19 | 24 | GPIO.24 | IN | 0 | 35 || 36 | 0 | IN | GPIO.27 | 27 | 16 |4 |5 O1 _7 S/ d* C
- | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 |
* E; `6 }6 T9 u/ r& _6 ?- i0 H3 l - | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 |
s/ G8 `0 ~, C+ \ - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
. U3 h7 D+ ]( b$ |% }9 a+ N" Z - | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
$ _2 f- m1 ~) [ - +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+
4 U) v) n" t1 C( a J- L4 R: d
复制代码这时候就可以继续像往常那样使用GPIO的引脚进行编程了。
我们尝试一下使用gpio 引脚点亮一个LED灯。LED灯接在物理引脚12号,名称GPIO.1 针对WPi 引脚为1, BCM引脚为18号。
编写一个C源码:led.c

调用gcc编译:
gcc -o led -lwiringPi led.c
执行:
./led
终端显示:
, u. V( F4 t, U
由于手头的电阻阻值比较大,效果不明显,所以去掉了电阻,实际上大家应该加个220欧姆的电阻来保护LED
2 d2 f; m) p0 S2 w+ W
# x8 f3 s" {$ n) a+ i. F3 G$ u
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