食用指南

• 配置清单
• 硬件
• 硬件链接
• 软件
• 所需软件（Windows系统）
• 所需软件（Raspbian系统）
• 开启i2C功能
• 查看i2c地址
• 安装Adafruit_Python_SSD1306库
• 屏幕显示
• python程序运行
• 命令
• 后台运行命令
• 退出ssh，仍可运行命令
• 实际应用效果图（微博热搜）

配置清单

硬件

• 树莓派4B x 1台
• 四针脚0.96寸12468屏幕 x 1块
• 母对母杜邦线 x 4条

硬件链接

• 树莓派引脚图
• 屏幕细节尺寸图
• 针脚连接方法

二、引脚定义及连接方法

软件

连接好硬件设备，我们开始软件方面的配置。

所需软件（Windows系统）

• PUTTY
• FileZilla

有了以上两个软件，我们便可以和树莓派系统实现互联互通，通过Windows来控制树莓派和文件的相互拷贝

所需软件（Raspbian系统）

通过命令我们来安装屏幕所需要的驱动：

开启i2C功能

sudo apt-get install -y python-smbus
sudo apt-get install -y i2c-tools
sudo raspi-config

查看i2c地址

sudo i2cdetect -y 1

安装Adafruit_Python_SSD1306库

sudo apt-get update
sudo apt-get install build-essential python-dev python-pip
sudo pip install RPi.GPIO
sudo apt-get install python-imaging python-smbus
sudo apt-get install git
git clone https://github.com/adafruit/Adafruit_Python_SSD1306.git
cd Adafruit_Python_SSD1306
sudo python setup.py install

python如果是3.x版本，pip需要改成pip3

屏幕显示

安装好Adafruit_Python_SSD1306库后，cd examples进入例程目录，ls查看文件。
下面以shapes.py例程说明。

import time
      
import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306
      
import Image
import ImageDraw
import ImageFont
 
# Raspberry Pi pin configuration:
RST = 24
# Note the following are only used with SPI:
DC = 23
SPI_PORT = 0
SPI_DEVICE = 0
      
# Beaglebone Black pin configuration:
# RST = 'P9_12'
# Note the following are only used with SPI:
# DC = 'P9_15'
# SPI_PORT = 1
# SPI_DEVICE = 0
 
# 128x32 display with hardware I2C:
disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)
      
# 128x64 display with hardware I2C:
# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)
      
# Alternatively you can specify an explicit I2C bus number, for example
# with the 128x32 display you would use:
# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, i2c_bus=2)
      
# 128x32 display with hardware SPI:
# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
      
# 128x64 display with hardware SPI:
# disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST, dc=DC, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE, max_speed_hz=8000000))
      
# Alternatively you can specify a software SPI implementation by providing
# digital GPIO pin numbers for all the required display pins. For example
# on a Raspberry Pi with the 128x32 display you might use:
# disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST, dc=DC, sclk=18, din=25, cs=22)
 
# Initialize library.
disp.begin()
      
# Clear display.
disp.clear()
disp.display()
      
# Create blank image for drawing.
# Make sure to create image with mode '1' for 1-bit color.
width = disp.width
height = disp.height
image = Image.new('1', (width, height))
      
# Get drawing object to draw on image.
draw = ImageDraw.Draw(image)
      
# Draw a black filled box to clear the image.
draw.rectangle((0,0,width,height), outline=0, fill=0)
 
# Draw some shapes.
# First define some constants to allow easy resizing of shapes.
padding = 2
shape_width = 20
top = padding
bottom = height-padding
# Move left to right keeping track of the current x position for drawing shapes.
x = padding
# Draw an ellipse.
draw.ellipse((x, top , x+shape_width, bottom), outline=255, fill=0)
x += shape_width+padding
# Draw a rectangle.
draw.rectangle((x, top, x+shape_width, bottom), outline=255, fill=0)
x += shape_width+padding
# Draw a triangle.
draw.polygon([(x, bottom), (x+shape_width/2, top), (x+shape_width, bottom)], outline=255, fill=0)
x += shape_width+padding
# Draw an X.
draw.line((x, bottom, x+shape_width, top), fill=255)
draw.line((x, top, x+shape_width, bottom), fill=255)
x += shape_width+padding
 
# Load default font.
font = ImageFont.load_default()
      
# Alternatively load a TTF font.
# Some other nice fonts to try: http://www.dafont.com/bitmap.php
#font = ImageFont.truetype('Minecraftia.ttf', 8)
      
# Write two lines of text.
draw.text((x, top),    'Hello',  font=font, fill=255)
draw.text((x, top+20), 'World!', font=font, fill=255)
 
# Display image.
disp.image(image)
disp.display()

按照你的oled屏修改代码，程序默认是12832的，你的oled屏是这个就不用改直接运行就OK。
如果是12864的I2C就像下面那样修改，把12832加#注释，12864#注释去掉保存。

# 128x32 display with hardware I2C:
#disp = Adafruit_SSD1306.SSD1306_128_32(rst=RST)
      
# 128x64 display with hardware I2C:
disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)

终端输入sudo python shapes.py或用Python打开文件运行就能看到OLED屏有显示了。

python程序运行

命令

python test1.py

后台运行命令

python test.py &

退出ssh，仍可运行命令

nohup python test.py >null 2>&1 &

实际应用效果图（微博热搜）