Difference between revisions of "RPi.GPIO : NanoPi NEO/NEO2/Air GPIO Programming with Python"

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==RPi.GPIO_NP示例==
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==Code Samples with RPi.GPIO_NP==
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以NanoPi  NEO2为例，将一个[[Matrix - LED]]通过连接至NanoPi  NEO2，像下图这样：<br />
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Here is code sample on how to access a NanoPi NEO2. A [[Matrix - LED]] is connected to a NanoPi NEO2 in the following hardware setup:<br />
 
[[File:WiringNP-LED-Demo.jpg|frameless|300px|WiringNP-LED-Demo]]<br />
 
[[File:WiringNP-LED-Demo.jpg|frameless|300px|WiringNP-LED-Demo]]<br />
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其中，引脚的连接对应如下：<br />
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Pin Connection:<br />
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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|Matrix-LED || NanoPi M1
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|Matrix-LED || NanoPi NEO2
 
|-
 
|-
 
|S    || Pin7
 
|S    || Pin7
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接下来我们用Python实现一个LED闪烁的例子, <br />
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The code sample shows how to make an LED blink in Python<br />
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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: <br />
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Pin 7 is accessed in this code sample:<br />
  
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=== Python语言示例 ===
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===Code Sample in Python===
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创建一个Python源文件：
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Create a source file in Python:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
vi led.py
 
vi led.py
 
</syntaxhighlight>
 
</syntaxhighlight>
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然后键入如下代码:
+
Type in the following lines:
 
<syntaxhighlight lang="python">
 
<syntaxhighlight lang="python">
 
#!/usr/bin/env python
 
#!/usr/bin/env python
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         time.sleep(1)
 
         time.sleep(1)
 
</syntaxhighlight>
 
</syntaxhighlight>
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运行led.py：
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Run led.py：
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
chmod +x led.py
 
chmod +x led.py
 
sudo ./led.py
 
sudo ./led.py
 
</syntaxhighlight>
 
</syntaxhighlight>
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看到LED灯一闪一闪的，就表示成功了。
+
The LED module will blink if you do everything right.

Revision as of 13:22, 7 June 2017

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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 Install RPi.GPIO_NP

The RPi.GPIO_NP library is integrated in all the UbuntuCore images that are and will be released after June 5, 2017. Therefore for images released after this date no installation is needed.

3 Applicable Board Types and Image Files

Here is a table which lists all the board types and image files that work with RPi.GPIO. These image files are under the "official-ROMs" directories of the corresponding download links:

Board Type Image File Download Link 1 Download Link 2
NanoPi NEO2 nanopi-neo2_ubuntu-core-xenial_4.11.0_YYYYMMDD.img.zip baidu MediaFire
NanoPi NEO nanopi-neo_ubuntu-core-xenial_4.11.0_YYYYMMDD.img.zip baidu MediaFire
NanoPi NEO Air nanopi-neo-air_ubuntu-core-xenial_4.11.0_YYYYMMDD.img.zip baidu MediaFire

4 Code Samples with RPi.GPIO_NP

Here is code sample on how to access a NanoPi NEO2. A Matrix - LED is connected to a NanoPi NEO2 in the following hardware setup:
WiringNP-LED-Demo
Pin Connection:

Matrix-LED NanoPi NEO2
S Pin7
V Pin4
G Pin6

The code sample shows how to make an LED blink in Python
Pin 7 is accessed in this code sample:

4.1 Code Sample in Python

Create a source file in Python: 

vi led.py

Type in the following lines: 

#!/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)

Run led.py： 

chmod +x led.py
sudo ./led.py

The LED module will blink if you do everything right.

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