《树莓派》开发 之 用 0.96OLED 播放 badapple

•  安装树莓派环境下的OLED库：树莓派实验室

• 为了更好的显示性能，例如显示动画时如对帧率有要求，可以通过修改下面的参数将 I2C 频率从默认的 100KHz 或 400KHz 提升到 1MHz。

  命令：	sudo nano /boot/config.txt

  在文件末添加一行：

dtparam=i2c_baudrate=1000000

sudo  reboot 重启 树莓派即可生效

• 将 badapple 视频转为图片：《MATLAB》应用 之 用 MATLAB 将 badapple 视频转换为128*64分辨率图片
• 使用 FileZilla 工具将生成的 badapple 文件夹复制到 badapple.py 文件夹下（或者使用电脑拷贝到树莓派系统TFT卡）

badapple.py文件：

import time

import Adafruit_GPIO.SPI as SPI
import Adafruit_SSD1306

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

import subprocess

RST = None

disp = Adafruit_SSD1306.SSD1306_128_64(rst=RST)

# Initialize library.
disp.begin()

# Clear display.
disp.clear()
disp.display()

while True:
    x = 0
    y = -2
    # 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)
    
    font = ImageFont.truetype('123.ttf', 13)
    
    for Test in range(1,50):
        # Draw a black filled box to clear the image.
        draw.rectangle((0,0,width,height), outline=0, fill=0)

        # Shell scripts for system monitoring from here : https://unix.stackexchange.com/questions/119126/command-to-display-memory-usage-disk-usage-and-cpu-load
        cmd = "hostname -I | cut -d\' \' -f1"
        IP = subprocess.check_output(cmd, shell = True )
        cmd = "top -bn1 | grep load | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'"
        CPU = subprocess.check_output(cmd, shell = True )
        cmd = "free -m | awk 'NR==2{printf \"Mem: %s/%sMB %.2f%%\", $3,$2,$3*100/$2 }'"
        MemUsage = subprocess.check_output(cmd, shell = True )
        cmd = "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%dGB %s\", $3,$2,$5}'"
        Disk = subprocess.check_output(cmd, shell = True )

        # Write two lines of text.
        draw.text((x+32, y),    "Liuzewen pi",  font=font, fill=255)
        draw.text((x, y+11),    "Test: ",  font=font, fill=255)
        draw.text((x, y+22),    "IP: " + str(IP),  font=font, fill=255)
        draw.text((x, y+32),    str(CPU), font=font, fill=255)
        draw.text((x, y+42),    str(MemUsage),  font=font, fill=255)
        draw.text((x, y+52),    str(Disk),  font=font, fill=255)

        # Display image.
        disp.image(image)
        disp.display()
        time.sleep(.1)
        
    for begin in range(1,10):
        draw.rectangle((0,0,width,height), outline=0, fill=0)
        font = ImageFont.truetype('cubic.ttf', 20)
        draw.text((x+32, y+24), "Begin", font=font, fill=255)
        font = ImageFont.truetype('LED Dot-Matrix.ttf', 14)
        draw.text((x+115, y), str(10+1-begin) , font=font, fill=255)
        # Display image.
        disp.image(image)
        disp.display()
        time.sleep(1)
    
    for I_image in range(1,6540):#6540
        image = Image.open('badapple/'+str(I_image)+'.jpg').convert('1')
        disp.image(image)
        disp.display()   
    

• 最终 OLED 屏幕 的刷新速率可以达到 30 帧
• badapple.py 中的 123.ttf 、 cubic.ttf 、 LED Dot-Matrix.ttf 均为字体名，可自行下载字体并放在 badapple.py 目录下，并将程序中字体修改为对应字体即可~

字体下载网站：https://www.dafont.com/bitmap.php?page=4

• 命令：sudo python badapple.py  即可看到屏幕动了起来^-^~

• 最终播放效果：稍后上传到 哔哩哔哩