香橙派4 LTS 安装 WiringPi

**下载wiringOP-Python**

```bash
root@orangepi:~# sudo apt-get update
root@orangepi:~# sudo apt-get -y install git swig python3-dev python3-setuptools

#下面的 git clone--recursive 命令会自动下载 wiringOP 的源码，因为
# wiringOP-Python 是依赖 wiringOP 的。请确保下载过程没有因为网络问题而报错。
# git 可能访问超时，多试几次
root@orangepi:~# git clone --recursive https://github.com/orangepi-xunlong/wiringOP-Python
```

**编译&安装 wiringOP-Python**

```bash
root@orangepi:~# cd wiringOP-Python
root@orangepi:~/wiringOP-Python# python3 generate-bindings.py > bindings.i
root@orangepi:~/wiringOP-Python# sudo python3 setup.py install
```

**查看 wiringOP-Python 帮助**

```bash
root@orangepi:~/wiringOP-Python# python3 -c "import wiringpi; help(wiringpi)"

Help on module wiringpi:

NAME
    wiringpi

DESCRIPTION
    # This file was automatically generated by SWIG (http://www.swig.org).
    # Version 4.0.2
    #
    # Do not make changes to this file unless you know what you are doing--modify
    # the SWIG interface file instead.

**查看板子 wPi号与物理引脚的对应关系**

```bash
bj@orangepi4-lts:~/Downloads/wiringOP-Python$ gpio readall
 +------+-----+----------+--------+---+ OPi 4 LTS+---+--------+----------+-----+------+
 | GPIO | wPi |   Name   |  Mode  | V | Physical | V |  Mode  | Name     | wPi | GPIO |
 +------+-----+----------+--------+---+----++----+---+--------+----------+-----+------+
 |      |     |     3.3V |        |   |  1 || 2  |   |        | 5V       |     |      |
 |   64 |   0 | I2C8_SDA |   ALT2 | 1 |  3 || 4  |   |        | 5V       |     |      |
 |   65 |   1 | I2C8_SCL |   ALT2 | 1 |  5 || 6  |   |        | GND      |     |      |
 |  150 |   2 |     PWM1 |     IN | 0 |  7 || 8  | 1 | ALT2   | I2C3_SCL | 3   | 145  |
 |      |     |      GND |        |   |  9 || 10 | 1 | ALT2   | I2C3_SDA | 4   | 144  |
 |   33 |   5 | GPIO1_A1 |     IN | 0 | 11 || 12 | 1 | IN     | GPIO1_C2 | 6   | 50   |
 |   35 |   7 | GPIO1_A3 |     IN | 0 | 13 || 14 |   |        | GND      |     |      |
 |   92 |   8 | GPIO2_D4 |     IN | 0 | 15 || 16 | 0 | IN     | GPIO1_C6 | 9   | 54   |
 |      |     |     3.3V |        |   | 17 || 18 | 0 | IN     | GPIO1_C7 | 10  | 55   |
 |   40 |  11 | SPI1_TXD |   ALT3 | 0 | 19 || 20 |   |        | GND      |     |      |
 |   39 |  12 | SPI1_RXD |   ALT3 | 1 | 21 || 22 | 0 | IN     | GPIO1_D0 | 13  | 56   |
 |   41 |  14 | SPI1_CLK |   ALT3 | 0 | 23 || 24 | 1 | ALT3   | SPI1_CS  | 15  | 42   |
 |      |     |      GND |        |   | 25 || 26 | 0 | IN     | GPIO4_C5 | 16  | 149  |
 +------+-----+----------+--------+---+----++----+---+--------+----------+-----+------+
 | GPIO | wPi |   Name   |  Mode  | V | Physical | V |  Mode  | Name     | wPi | GPIO |
 +------+-----+----------+--------+---+ OPi 4 LTS+---+--------+----------+-----+------+
```

# 参考文档

[wiringPi 库详解](https://www.cnblogs.com/lulipro/p/5992172.html)