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刷hame_a100笔记.txt
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刷hame_a100笔记.txt
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给HAME A100刷固件
目的:
1. 给HAME A100刷固件
2. 配置上UVC驱动
3. 修改内核自带的UVC驱动,使其支持我们自制的二合一摄像头
4. 移植mjpg-streamer
5. 实现开机自启动、热拔插功能
便携的无线监控设备 = 路由器(HAME A100) + USB摄像头(二合一摄像头) + 手机
HAME A100:
CPU: RT5350
FLASH: 8M SPI FLASH
SDRAM: 32M
固件:
可以理解为我们自己的内核和文件系统
一,环境的搭建
a,解压100ask_toolchain.bz2:
tar xjvf 100ask_toolchain.bz2
b,安装工具连:
cd toolchain/
sudo tar jxf buildroot-gcc342.tar.bz2 -C /opt
c,安装内核压缩工具:
cd lzma-4.32.0beta5
./configure
make
sudo make install
d,安装rootfs工具:linux 2.6
cd ..
cd mksquash_lzma-3.2
make
sudo make install
若安装错误,安装zlib库。 sudo apt-get install zlib1g-dev
二,配置与编译固件
tar xjvf 100ask.bz2
cd 5350_source/
vim .config
-- CONFIG_CROSS_COMPILER_PATH="/opt/buildroot-gcc342/bin"
make clean
make
结果:
flash_100ask_IP_Camera_debug_V1.0.4.bin
2.1 配置上UVC驱动
Device Drivers --->
Multimedia devices --->
<*> Video For Linux
Video Capture Adapters --->
<*> USB Video Class (UVC)
问:“/dev/video0”该设备节点是谁创建的?怎么取消掉?
答:
1.肯定是通过运行脚步中的mknod这个命令来创建的。
通过分析内核的启动流程,发现internet.sh是我们要
找的脚步,然后在该脚步中发现了如下命令:
mknod /dev/video0 c 81 0
2. 要取消掉video0这个设备节点,只需将该行注释掉即可。
2.2 修改UVC驱动
三,烧写固件
1. 连接好串口,并搭建好相应的环境后,启动路由器
Please choose the operation:
1: Load system code to SDRAM via TFTP.
2: Load system code then write to Flash via TFTP.
3: Boot system code via Flash (default).
4: Entr boot command line interface.
7: Load Boot Loader code then write to Flash via Serial.
9: Load Boot Loader code then write to Flash via TFTP
2. 选择如上选项的1;
Please Input new ones /or Ctrl-C to discard
Input device IP (192.168.1.155) ==:192.168.1.155 // 设备IP,与服务器IP同一个网段
Input server IP (192.168.1.105) ==:192.168.1.105 // 服务器IP
Input Linux Kernel filename (flash_100ask_IP_Camera_debug_V1.0.4.bin) ==:flash_100ask_IP_Camera_debug_V1.0.4.bin // 固件名称
四,移植mjpg-streamer
1. 安装交叉编译器
vim /etc//environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/buildroot-gcc342/bin"
sudo reboot
mipsel-linux-gcc -v
2. 交叉编译libjpeg
tar xzvf libjpeg-turbo-1.2.1.tar.gz
cd libjpeg-turbo-1.2.1
mkdir tmp
./configure --prefix=/work/mjpg_streamer/libjpeg-turbo-1.2.1/tmp/ --host=mipsel-linux
make
make install
cp *so* /work/hame_a100/5350_source/romfs/lib -d
3. 交叉编译mjpg-streamer
tar xzvf mjpg-streamer-r63.tar.gz
cd mjpg-streamer-r63/
修改所有的Makefile
--(1) 将 CC=gcc 修改为 CC=mipsel-linux-gcc
--(2) 修改plugins/input_uvc/Makfile
a.将
CFLAGS += -O2 -DLINUX -D_GNU_SOURCE -Wall -shared -fPIC
改为
CFLAGS += -O2 -DLINUX -D_GNU_SOURCE -Wall -shared -fPIC -I /work/luyou/5350_source/linux-2.6.21.x/include -I /work/mjpg_streamer/libjpeg-turbo-1.2.1/tmp/include
b.将
input_uvc.so: $(OTHER_HEADERS) input_uvc.c v4l2uvc.lo jpeg_utils.lo dynctrl.lo
$(CC) $(CFLAGS) -ljpeg -o $@ input_uvc.c v4l2uvc.lo jpeg_utils.lo dynctrl.lo
改为
input_uvc.so: $(OTHER_HEADERS) input_uvc.c v4l2uvc.lo jpeg_utils.lo dynctrl.lo
$(CC) $(CFLAGS) -ljpeg -L /work/mjpg_streamer/libjpeg-turbo-1.2.1/tmp/lib -o $@ input_uvc.c v4l2uvc.lo jpeg_utils.lo dynctrl.lo
make
cp *so* /work/luyou/5350_source/romfs/lib -d
cp mjpg_streamer /work/luyou/5350_source/romfs/bin/
4. 测试
1)
二合一摄像头:
mjpg_streamer -i "input_uvc.so -f 10 -r 320*240" -o "output_http.so -w www"
一般的摄像头:
mjpg_streamer -i "input_uvc.so -f 10 -r 320*240 -y" -o "output_http.so -w www"
2)断开网线;
3)手机连接上路hame a100由器的wifi信号;
4)运行手机上的MjpegMonitor软件;
五,热拔插
mdev.conf的格式:
<device regex> <uid>:<gid> <octal permissions> [<@|$|*> <command>]
device regex:正则表达式,表示哪一个设备
uid: owner
gid: 组ID
octal permissions:以八进制表示的属性
@:创建设备节点之后执行命令
$:删除设备节点之前执行命令
*: 创建设备节点之后 和 删除设备节点之前 执行命令
command:要执行的命令
问:路由器上的文件系统中的/etc/mdev.conf是谁创建的?里面的内容又是谁填入的?
答:
cd /work/hame_a100/5350_source/user/rt2880_app/scripts
vim
发现:
echo "# <device regex> <uid>:<gid> <octal permissions> [<@|$|*> <command>]" > /etc/mdev.conf
echo "# The special characters have the meaning:" >> /etc/mdev.conf
echo "# @ Run after creating the device." >> /etc/mdev.conf
echo "# $ Run before removing the device." >> /etc/mdev.conf
echo "# * Run both after creating and before removing the device." >> /etc/mdev.conf
echo "sd[a-z][1-9] 0:0 0660 */sbin/automount.sh \$MDEV" >> /etc/mdev.conf
echo "sd[a-z] 0:0 0660 */sbin/automount.sh \$MDEV" >> /etc/mdev.conf
问:怎么实现摄像头的热拔插功能?
答:
1).
echo "video[012345]? 0:0 777 * /bin/mjpg-streamer.sh /dev/\$MDEV" >> /etc/mdev.conf
2).
实现mjpg-streamer.sh
#!/bin/sh
NAME=mjpg_streamer
PROG=/bin/$NAME
DEVICE=$1
FPS=10
RESOLUTION=320*240
if [ $ACTION = "add" ];
then
# USB video in
if [ -e $DEVICE ];then
$PROG -i "input_uvc.so -d $DEVICE -f $FPS -r $RESOLUTION" -o "output_http.so -w www" &
else
# not find device
exit -2
fi
sleep 3
# check if mjpg_streamer is running
pgrep $NAME
if [ $? -ne 0 ];then
# try to mjpg_streamer YUYV format
$PROG -i "input_uvc.so -d $DEVICE -y -f $FPS -r $RESOLUTION" -o "output_http.so -w www" &
fi
else
killall -9 $NAME
fi
思路:
先
mjpg_streamer -i "input_uvc.so -f 10 -r 320*240" -o "output_http.so -w www"
后
mjpg_streamer -i "input_uvc.so -f 10 -r 320*240 -y" -o "output_http.so -w www"
附件:
-e file : 如果file是存在的,则返回真
pgrep: 通过进程的名字来查询进程是否正常运行的工具,一般就是用来判断程序是否正常运行
$?:表示最后支持的命令的推出状态,如果为0,则表示没有错误
六,开机自启动
1).写一个脚本文件run.sh
#!/bin/sh
NAME=mjpg_streamer
PROG=/bin/$NAME
DEVICE=/dev/video0
FPS=10
RESOLUTION=320*240
if [ -e $DEVICE ];then
$PROG -i "input_uvc.so -d $DEVICE -f $FPS -r $RESOLUTION" -o "output_http.so -w www" &
sleep 3
# check if mjpg_streamer is running
pgrep $NAME
if [ $? -ne 0 ];then
# try to mjpg_streamer YUYV format
$PROG -i "input_uvc.so -d $DEVICE -y -f $FPS -r $RESOLUTION" -o "output_http.so -w www" &
fi
else
# not find device
exit -2
fi
2).让系统自动运行这个脚步文件
将运行run.sh脚本的命令添加到internet.sh中即可
七,将固件烧写到flash
方法1:
Please choose the operation:
1: Load system code to SDRAM via TFTP.
2: Load system code then write to Flash via TFTP.
3: Boot system code via Flash (default).
4: Entr boot command line interface.
7: Load Boot Loader code then write to Flash via Serial.
9: Load Boot Loader code then write to Flash via TFTP.
You choosed 2 // 不同之处
0
2: System Load Linux Kernel then write to Flash via TFTP.
Warning!! Erase Linux in Flash then burn new one. Are you sure?(Y/N)
Please Input new ones /or Ctrl-C to discard
Input device IP (192.168.1.155) ==:192.168.1.155
Input server IP (192.168.1.105) ==:192.168.1.105
Input Linux Kernel filename (flash_100ask_IP_Camera_debug_V1.0.4.bin) ==:flash_100ask_IP_Camera_debug_V1.0.4.bin
方法2:
通过网络升级的办法来下载固件
注意:
1. 串口的波特率为57600(8N1);