树莓派配置

软件准备

安装

打开Win32DiskImager，烧录Resbian系统

配置

打开Putty ，树莓派接路由器网线，查看192.168.1.1的IP地址分配

树莓派最新的raspberry系统（2016.11.25日更新的系统）默认是关闭ssh功能的，如果可以连接屏幕，进入系统开启即可。

如果只能连ssh，先将sd卡取出，插入电脑，在boot分区新建个ssh文件夹即可

账号是pi，密码是raspberry
sudo raspi-config
把整个系统的可用空间扩展到储存卡的大小，改密码，使能各种接口。
修改更新源/etc/apt/sources.list

deb http://mirrors.zju.edu.cn/raspbian/raspbian/ jessie main contrib non-free rpi
deb-src http://mirrors.zju.edu.cn/raspbian/raspbian/ jessie main contrib non-free rpi

然后更新sudo apt-get update
装vnc服务sudo apt-get install tightvncserver
开机自启动VNC

输入vncpasswd，设置密码
新建文件sudo nano /etc/init.d/tightvncserver
#!/bin/sh
### BEGIN INIT INFO
# Provides:          tightvncserver
# Required-Start:    $local_fs
# Required-Stop:     $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start/stop tightvncserver
### END INIT INFO

# More details see:
# http://www.penguintutor.com/linux/tightvnc

### Customize this entry
# Set the USER variable to the name of the user to start tightvncserver under
export USER='pi'
### End customization required

eval cd ~$USER

case "$1" in
  start)
    # 启动命令行。此处自定义分辨率、控制台号码或其它参数。
    su $USER -c '/usr/bin/tightvncserver -depth 16 -geometry 800x600 :1'
    echo "Starting TightVNC server for $USER "
    ;;
  stop)
    # 终止命令行。此处控制台号码与启动一致。
    su $USER -c '/usr/bin/tightvncserver -kill :1'
    echo "Tightvncserver stopped"
    ;;
  *)
    echo "Usage: /etc/init.d/tightvncserver {start|stop}"
    exit 1
    ;;
esac
exit 0
保存，配置服务
sudo chmod 755 /etc/init.d/tightvncserver
sudo update-rc.d tightvncserver defaults

自动连接wifi

修改/etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant
#ap_scan=1
network={
        ssid="wo_shi_yige_wifi_ssid"
        scan_ssid=1
        psk="wo_shi_mi_ma"
        priority=5
 }
 network={
        ssid="pi"
        psk="onlyforpi"
        priority=1
 }

修改/etc/network/interfaces，最后倒数两行替换成
iface wlan0 inet dhcp
wpa_conf /etc/wpa_supplicant/wpa_supplicant.conf

输入sudo ifup wlan0  链接wifi

安装Python-OpenCV

sudo apt-get update 
sudo apt-get upgrade
sudo apt-get install libopencv-dev
sudo apt-get install python-opencv

测试摄像头

sudo apt-get install xawtv
xawtv /dev/video0

测试OpenCV

# import the necessary packages
from picamera.array import PiRGBArray
from picamera import PiCamera
import time
import cv2

# initialize the camera and grab a reference to the raw camera capture
camera = PiCamera()
camera.resolution = (640, 480)
camera.framerate = 32
rawCapture = PiRGBArray(camera, size=(640, 480))

# allow the camera to warmup
time.sleep(0.1)

# capture frames from the camera
for frame in camera.capture_continuous(rawCapture, format="bgr", use_video_port=True):
    # grab the raw NumPy array representing the image, then initialize the timestamp
    # and occupied/unoccupied text
    image = frame.array

    # show the frame
    cv2.imshow("Frame", image)
    key = cv2.waitKey(1) & 0xFF

    # clear the stream in preparation for the next frame
    rawCapture.truncate(0)

    # if the `q` key was pressed, break from the loop
    if key == ord("q"):
        break

OpenCV2无法imshow（）

报错如下
Xlib:  extension "RANDR" missing on display ":1".

(image:14611): GdkGLExt-WARNING **: Window system doesn't support OpenGL.

RealVNC不支持OpenGL，所以无法调用cv2模块里的imshow()函数显示图像,改成了使用matplotlib库中的函数显示(单幅图像)

wiringPi安装

sudo apt-get install wiringPi
#测试是否安装成功
gpio -v
gpio readall

Python 程序开机自启动

sudo nano etc/rc.local
#在最后一行添加
python home/pi/XXX/XXX.py

Python 程序开机自启动2

在/home/pi/.config下创建一个文件夹，名称为autostart，并在该文件夹下创建一个xxx.desktop文件，文件内容如下：

[Desktop Entry]
Name=testname   #程序的名字
Comment=My Python Program
Exec=python /home/pi/ScanTest/Scan.py #程序的路径
Icon=/home/pi/ScanTest/Scan.png #
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;
StartupNotify=true

软件准备

安装

配置

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