RPi.GPIO : NanoPi NEO/NEO2/Air GPIO Programming with Python
From FriendlyELEC WiKi
Contents
1 Introduction to RPi.GPIO_NP
For users to easily access GPIO with python FriendlyElec integrated RPi.GPIO in the UbuntuCore image for the NanoPi NEO/NEO2.
RPi.GPIO is a famous library in python for Raspberry Pi. FriendlyElec ported it to the NanoPi NEO/NEO2's UbuntuCore and renamed it as RPi.GPIO_NP.
Most RPi.GPIO_NP's APIs are the same as those of RPi.GPIO and you can refer to https://pypi.python.org/pypi/RPi.GPIO for more details.
2 RPi.GPIO_NP安装
RPi.GPIO_NP已经预装在 2017/06/05 之后的 Ubuntu core系统中,无需安装。
3 支持RPi.GPIO_NP的开发板型号及固件列表
下表中列出了当前已支持RPi.GPIO_NP的开发板型号,以及对应的固件文件,固件文件位于下载链接的officail-ROMs目录:
4 RPi.GPIO_NP示例
以NanoPi NEO2为例,将一个Matrix - LED通过连接至NanoPi NEO2,像下图这样:
其中,引脚的连接对应如下:
Matrix-LED | NanoPi M1 |
S | Pin7 |
V | Pin4 |
G | Pin6 |
接下来我们用Python实现一个LED闪烁的例子,
在代码中使用数字7来操作Pin7这个引脚,即引脚的编号直接使用物理编号:
4.1 Python语言示例
创建一个Python源文件:
vi led.py
然后键入如下代码:
#!/usr/bin/env python import RPi.GPIO as GPIO import time PIN_NUM = 7 GPIO.setmode(GPIO.BOARD) GPIO.setup(PIN_NUM,GPIO.OUT) while True: GPIO.output(PIN_NUM,True) time.sleep(1) GPIO.output(PIN_NUM,False) time.sleep(1)
运行led.py:
chmod +x led.py sudo ./led.py
看到LED灯一闪一闪的,就表示成功了。