♞树莓派之安装墨水屏

2019-09-26-raspbian-buster-lite.img

墨水屏采用的是微雪电子的2.13inch e-Paper HAT型号，是带板黑白版的，支持局部刷新（如下图所示）

硬件连接

前期准备工作

#升级系统
sudo apt-get update
sudo apt-get upgrade

#开启SPI接口
sudo raspi-config
选择Interfacing Options -> SPI -> Yes 开启SPI接口

sudo reboot

sudo apt-get install git

安装Python及函数库

sudo apt-get update
sudo apt-get install python-pip
sudo apt-get install python-pil
sudo apt-get install python-numpy
sudo pip install RPi.GPIO
sudo pip install spidev

sudo apt-get update
sudo apt-get install python3-pip
sudo apt-get install python3-pil
sudo apt-get install python3-numpy
sudo pip3 install RPi.GPIO
sudo pip3 install spidev

sudo git clone https://github.com/waveshare/e-Paper
cd e-Paper/RaspberryPi\&JetsonNano/python/examples
sudo python3 epd_2in13_V3_test.py

#exit 0前插入
su pi -c "python3 /home/pi/e-Paper/RaspberryPi\&JetsonNano/python/examples/view_ip.py"

#!/usr/bin/python
# -*- coding:utf-8 -*-
#250*122
import sys
import os
import socket
picdir = os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), 'pic')
libdir = os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), 'lib')
if os.path.exists(libdir):
    sys.path.append(libdir)

import logging
from waveshare_epd import epd2in13_V2
import time,datetime
from PIL import Image,ImageDraw,ImageFont
import traceback

logging.basicConfig(level=logging.DEBUG)

try:
    
    # Drawing on the image
    fonta = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 14)
    fontb = ImageFont.truetype(os.path.join(picdir, 'Font.ttc'), 18)
    
    # # partial update
    logging.info("1.show IP Address")
    epd = epd2in13_V2.EPD()
    view_ip_w = Image.new('1', (epd.height, epd.width), 255)
    view_ip = ImageDraw.Draw(view_ip_w)
    
    eth0_status=os.popen("ethtool eth0 |grep \"Link detected:\"").readline().split(":")[1].replace("\n"," ").strip()
    #print(eth0_status)
    if eth0_status == "yes":
        #提取IP地址
	#s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)   
	#s.connect(('1.1.1.1',80))
	#ip_address =s.getsockname()[0]
	#s.close()
        ip_address=os.popen("ifconfig eth0 |grep \"inet \"").readline().strip().split(" ")[1]
    else:
        ip_address="未联接有线网络"

    ff=open("/etc/hostapd/hostapd.conf","rt")
    fff=ff.readlines()
    
    wifi_ssid=fff[1].split("=")[1]
    wifi_pass=fff[7].split("=")[1]
    ff.close()
    del fff
    start_date="本次开机时间："+datetime.datetime.now().strftime("%Y-%m-%d  %H:%M:%S") 

    view_ip.text((10, 5), u'东港市黑马网络科技有限公司', font = fontb, fill = 0)
    view_ip.line([(0,30),(250,30)], fill = 0,width = 2)
    view_ip.line([(0,55),(250,55)], fill = 0,width = 1)
    view_ip.text((0,35), u"有线访问地址:"+ip_address, font = fonta, fill = 0)
    view_ip.text((0,59), u"无线访问地址:192.168.66.1", font = fonta, fill = 0)
    view_ip.line([(0,80),(250,80)], fill = 0,width = 2)
    view_ip.text((0,82),u'热点',font=fonta,fill=0)
    view_ip.line([(35,80),(35,100)], fill = 0,width = 1)
    view_ip.line([(125,80),(125,100)],fill=0,width=1)
    view_ip.text((40,82),wifi_ssid,font=fonta,fill=0)  
    view_ip.text((130,82),wifi_pass,font=fonta,fill=0)  
    view_ip.line([(0,100),(250,100)], fill = 0,width = 2)
    view_ip.text((0,104),start_date,font=fonta,fill=0)
    epd.init(epd.FULL_UPDATE)
    epd.displayPartBaseImage(epd.getbuffer(view_ip_w))


    #epd.init(epd.PART_UPDATE)
    #epd.displayPartial(epd.getbuffer(view_ip_w))
    #epd.display(epd.getbuffer(view_ip_w))

    
    #logging.info("Clear...")
    #epd.init(epd.FULL_UPDATE)
    #epd.Clear(0xFF)
    
    logging.info("Goto Sleep...")
    epd.sleep()
        
except IOError as e:
    logging.info(e)
    
except KeyboardInterrupt:    
    logging.info("ctrl + c:")
    epd2in13_V2.epdconfig.module_exit()
    exit()