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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
+ ?) S0 X' Q, c! ?& Z2 I/ L - wget https://project-downloads.drogon.net/wiringpi-latest.deb2 [+ n4 e2 k: N9 N! e* L
- 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
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- +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+2 G d) _3 E2 O ~- ~
- | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
+ @) h" z1 d# d/ f* S5 S - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+4 F' S; u: S: \
- | | | 3.3v | | | 1 || 2 | | | 5v | | |
% C( D' Y1 T$ ]! @/ o; `! x - | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | |% b0 D8 Q/ V" \" q: u2 J
- | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | |
( k( I0 C; B; e' E - | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT0 | TxD | 15 | 14 |
) G9 D! r$ K% i) X - | | | 0v | | | 9 || 10 | 1 | ALT0 | RxD | 16 | 15 |2 _" X* D3 J) Q
- | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 |! a5 I. [0 f7 L4 {
- | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | |
- x9 M2 L; A5 S+ n o, w8 o+ A* W - | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 |
$ [& N; J% t' P! s1 x. y* M - | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 |
$ R9 s7 s! s2 N; O9 p' B - | 10 | 12 | MOSI | IN | 0 | 19 || 20 | | | 0v | | |
7 Q1 ]7 c' |9 [. m - | 9 | 13 | MISO | IN | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 |1 X! T- n! A7 p4 r' k' [' Y
- | 11 | 14 | SCLK | OUT | 0 | 23 || 24 | 1 | IN | CE0 | 10 | 8 |
1 ~% \, m8 X5 Y- \* C$ f. _/ g - | | | 0v | | | 25 || 26 | 1 | IN | CE1 | 11 | 7 |9 [+ _! i- \7 b, b; a
- | 0 | 30 | SDA.0 | OUT | 0 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 |+ y" E* p; ^5 b n7 C1 ^6 ^
- | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | |
( k7 \( y+ p* i- s% z4 y - | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 |& b; R" g5 w3 k* F) F7 a
- | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | |
0 a- b% B0 z; T% ^5 |7 r - | 19 | 24 | GPIO.24 | IN | 0 | 35 || 36 | 0 | IN | GPIO.27 | 27 | 16 |
: q2 n1 ], m# w; J9 A8 L - | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 |4 X! O/ |+ i! f- w# A2 H8 H" l% V" F
- | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 |* C' N. H" J/ b* W/ r! I
- +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
1 d: z* g4 p7 y- e! Q* ~5 M - | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
: P4 F' a4 X$ Z - +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+
; I( [$ o% c: z0 z# e$ N& @
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:
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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
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