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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 /tmp4 v! J& F c l0 v
- wget https://project-downloads.drogon.net/wiringpi-latest.deb
6 _ O% B7 B+ U+ q* ~) | - 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
' j& f. ?! f' Y) \
- +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+" O9 w% R" w |& p$ z/ }7 h
- | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |3 c5 G ~: L! C
- +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
3 t% B/ K( M9 |0 D - | | | 3.3v | | | 1 || 2 | | | 5v | | |# {; y7 f& C# I4 J
- | 2 | 8 | SDA.1 | IN | 1 | 3 || 4 | | | 5v | | |! Y) z1 i- u0 k+ o5 {
- | 3 | 9 | SCL.1 | IN | 1 | 5 || 6 | | | 0v | | |( D* x: I1 p( @* h
- | 4 | 7 | GPIO. 7 | IN | 1 | 7 || 8 | 1 | ALT0 | TxD | 15 | 14 |4 D5 t6 r- z* d, S X7 N4 h. g
- | | | 0v | | | 9 || 10 | 1 | ALT0 | RxD | 16 | 15 |
9 L; U4 A" G* O% l - | 17 | 0 | GPIO. 0 | IN | 0 | 11 || 12 | 0 | IN | GPIO. 1 | 1 | 18 |
- {7 H6 R, S- |# `( n. G' z - | 27 | 2 | GPIO. 2 | IN | 0 | 13 || 14 | | | 0v | | |1 `- ?. g, V% K2 f
- | 22 | 3 | GPIO. 3 | IN | 0 | 15 || 16 | 0 | IN | GPIO. 4 | 4 | 23 |
& s# O7 P! X; ]6 c7 g - | | | 3.3v | | | 17 || 18 | 0 | IN | GPIO. 5 | 5 | 24 |2 y! r6 U% a) M0 }1 E
- | 10 | 12 | MOSI | IN | 0 | 19 || 20 | | | 0v | | |$ Y: {' Q( i% X l. M9 g
- | 9 | 13 | MISO | IN | 0 | 21 || 22 | 0 | IN | GPIO. 6 | 6 | 25 |+ g/ b+ _' _/ G( T4 ~4 R
- | 11 | 14 | SCLK | OUT | 0 | 23 || 24 | 1 | IN | CE0 | 10 | 8 |( C4 V5 C4 J0 M2 F& G
- | | | 0v | | | 25 || 26 | 1 | IN | CE1 | 11 | 7 |% b5 o3 o# p" N2 i9 q) L/ K* m! h
- | 0 | 30 | SDA.0 | OUT | 0 | 27 || 28 | 1 | IN | SCL.0 | 31 | 1 |
$ U& o1 m$ ]( i7 [3 X( F4 g1 t - | 5 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | |1 Z) _2 h3 S6 E" Q6 u8 T
- | 6 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | IN | GPIO.26 | 26 | 12 |( a: `& h; T( Q
- | 13 | 23 | GPIO.23 | IN | 0 | 33 || 34 | | | 0v | | |
$ j8 g4 t& t7 a- I - | 19 | 24 | GPIO.24 | IN | 0 | 35 || 36 | 0 | IN | GPIO.27 | 27 | 16 |
. U3 x+ H" \" x. r% W - | 26 | 25 | GPIO.25 | IN | 0 | 37 || 38 | 0 | IN | GPIO.28 | 28 | 20 |
( Z0 g5 ~+ N Y: Y* o7 T* ~/ F0 m - | | | 0v | | | 39 || 40 | 0 | IN | GPIO.29 | 29 | 21 |
* J: {8 n9 J. Y; @; Y2 K% u7 u/ U - +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+3 U9 A1 X- \& j1 b9 {
- | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM |
* L" v4 q; e4 W4 n - +-----+-----+---------+------+---+---Pi A+--+---+------+---------+-----+-----+
- t$ M. Z1 m; {
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:
8 ~6 m5 Z1 [ w( O( N* i7 D
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
! b t1 D( F, r8 h4 R3 r
! L- I0 B; S+ t9 e: R7 B
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