#./fileclient ./AppMain 192.168.1.168
#./fileclient ./helloworld.ko 192.168.1.168
上述更新文件,被发送至开发板的/tmp/update/(FileServer所在的目录)目录中。
重新启动开发板,文件升级完成。
注:如果要动态加载驱动模块,首先必须在开发板上创建/lib/modules/2.6.24.4目录。
附件:
• TCP/IP源码文件
http://download.csdn.net/source/2996852
注:TCP/IP 服务尽量使用大端口号,如:50000,否则服务器端会有Bind失败的情况出现。
服务器端如果有防火墙,需要开放该端口号,否则客户端会有connect失败的情况出现。
• StartShell脚本
#! /bin/sh
#判断是否有新的驱动文件,如果有进行替换
if [ -f /tmp/update/helloworld.ko ]
then
echo "it is a new ko file"
rm /lib/modules/helloworld.ko -f
cp /tmp/update/helloworld.ko /lib/modules/
rm /tmp/update/helloworld.ko -f
else
echo "it is not a new ko file"
fi
insmod helloworld
#判断是否有新的应用程序文件,如果有进行替换
if [ -f /tmp/update/AppMain ]
then
echo "it is a new app file"
rm /root/application/AppMain -f
cp /tmp/update/AppMain /root/application/
chmod 777 /tmp/update/AppMain
rm /tmp/update/AppMain -f
else
echo "it is not a new app file"
fi
#启动应用程序
cd /root/application/
./AppMain &
#启动TCP/IP服务程序
cd /tmp/update/
./FileServer &
Embedded Linux firmware upgrade
Development requirement
• Based on TCP/IP to complete the driver modules and application updates, upgrades
Special Statement
Drivers program and application program in this document are collectively called the “firmware”.
• Main machine: VMWare-Fedora 9
• Development Board: yc2440-64MB Nandflash; Kernel: 2.6.24.4
• Compiler: arm-linux-gcc-4.0.0
Design schematic
Description:
• Start FileServer application on development board, as the TCP/IP server, providing service to receive the upgrade file.
• When you need a firmware upgrade, PC starts FileClient application, as the TCP/IP client, providing service to send the upgrade file.
• Shell script file StartShell determine whether there is the firmware need to upgrade, if it is existed, launch the updated firmware, if not, start the existing firmware.
File
directory
function
FileClient
any directory in linux PC
PC TCP/IP client,
Send upgrade firmware to development board.
FileServer
/tmp/update/ in
linux development board
Development board TCP/IP server,
receive the upgrade firmware from client.
StartShell
/etc/init.d/ in
linux development board
Replace firmware,
Start frimware.
Implementation steps
Configuration startup files (development board: 192.168.1.168)
In the development board, edit the boot script file /etc/init.d/rcS, input the following information:
cp ~ /StartShell /etc/init.d/
vi /etc/init.d/rcS
Finally, in the end of the document, input the following information:
./StartShell
Restart the development board.
The update file is sent to the development board of the /tmp/update/(FileServer directory) directory.
Restart the development board, file upgrade is OK.
Note: If you want to dynamically load the driver module, first the directory /lib/modules/2.6.24.4 must be created in development board.
Attachment:
• TCP/IP source code file http://download.csdn.net/source/2996852
Note: TCP/IP service port to make use of large numbers, such as: 50000, otherwise there will be bind server failure situation.
If the server has a firewall, you need to open up the port number, otherwise the client will connect failure situation.
• StartShell script
#! /bin/sh
Determine whether there is a new driver file, if there is to be replaced
if [ -f /tmp/update/helloworld.ko ]
then
echo “it is a new ko file”
rm /lib/modules/helloworld.ko -f
cp /tmp/update/helloworld.ko /lib/modules/
rm /tmp/update/helloworld.ko -f
else
echo “it is not a new ko file”
fi
insmod helloworld
Determine whether there is a new application file, if there is to be replaced
if [ -f /tmp/update/AppMain ]
then
echo “it is a new app file”
rm /root/application/AppMain -f
cp /tmp/update/AppMain /root/application/
chmod 777 /tmp/update/AppMain
rm /tmp/update/AppMain -f
else
echo “it is not a new app file”
fi