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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 /tmp
2 `3 h g4 l4 [( E7 |% q) S - wget https://project-downloads.drogon.net/wiringpi-latest.deb
. }; t, T9 F6 V4 Q% k, T' \ - 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
$ r8 s- g7 T/ p' o7 a, g* o% C
- +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+) y; K8 R1 g$ I& |* |. Z, V7 A; N
- | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
% T; g9 r- g) [* A3 f% ?4 h - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
, A" i# d* n8 T' L8 v9 S+ T - | | | 3.3v | | | 1 || 2 | | | 5v | | |! s' e) G6 t0 D1 ]- i* j- F
- | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | |1 q) K0 f0 p* k! m1 S* ?
- | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | |. }9 Z! [6 J4 x; @5 l
- | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT0 | TxD | 15 | 14 |# L7 [7 K5 ~* U- H
- | | | 0v | | | 9 || 10 | 1 | ALT0 | RxD | 16 | 15 |
3 B5 U6 i2 ~) D - | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 |
" y6 r. h( r0 X, m. N - | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | |3 }5 U w0 k* k: B8 Y
- | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 |
' f( W. M0 ~* n' x4 d - | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 |
( t h, C5 {% e8 x* a - | 10 | 12 | MOSI | IN | 0 | 19 || 20 | | | 0v | | |
* m3 d" g, s4 e( X2 Q! O! ~ - | 9 | 13 | MISO | IN | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 |7 h* b6 \5 A% L; R1 d
- | 11 | 14 | SCLK | OUT | 0 | 23 || 24 | 1 | IN | CE0 | 10 | 8 |3 r; h+ Z0 M% X/ X
- | | | 0v | | | 25 || 26 | 1 | IN | CE1 | 11 | 7 |
# ^, v: l4 ^4 t- m. _ - | 0 | 30 | SDA.0 | OUT | 0 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 |% r& i$ N0 \; Q$ U, b6 N7 l% X
- | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | |+ F9 }( _1 ~' w
- | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 |
9 C" B- @" Z8 i- O' `0 ` - | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | |
3 P0 |7 p# s1 ~' M( {( a( N- } - | 19 | 24 | GPIO.24 | IN | 0 | 35 || 36 | 0 | IN | GPIO.27 | 27 | 16 |
# z2 a# ^# `) C - | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 |& O. U' d6 ?5 u( y1 J) `' U
- | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 |
9 g- n. ?$ J& y W% B R: c% @( T - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
. C+ {! L0 w% ]9 I g1 }) u7 m4 }) p - | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
; a# k% q" J4 k3 h9 U3 | - +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+! U2 g$ u; E' ?) r1 L6 ?
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:
% P( k" j( B5 f% N: e7 G7 z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 K$ Z. E9 Z6 a! `9 j3 G4 H
7 y3 E' L, y$ z( l$ D
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