嵌入式Linux固件升级
嵌入式Linux固件升级
开发需求
· 基于TCP/IP完成驱动模块和应用程序的更新、升级
特殊声明
该文档中驱动程序和应用程序统称为“固件”。
· 主 机：VMWare--Fedora 9
· 开发板：yc2440--64MB Nandflash；Kernel:2.6.24.4
· 编译器：arm-linux-gcc-4.0.0
设计原理图
说明：
· 开发板启动FileServer应用程序，作为TCP/IP的Server端，提供接收升级文件的服务。
· 当需要进行固件升级时，PC启动FileClient应用程序，作为TCP/IP的Client端，提供发送升级文件的服务。
· Shell脚本文件StartShell判断是否有固件需要升级，如果有更新现有固件后，启动更新后的固件，如果没有，启动现有固件。
|
文件名称 |
所在目录 |
功能 |
|
FileClient |
Linux PC下任意目录 |
PC机TCP/IP客户端， 向开发板发送升级固件。 |
|
FileServer |
Linux开发板 /tmp/update/ |
开发板TCP/IP服务端， 接收客户端发送的升级固件。 |
|
StartShell |
Linux开发板 /etc/init.d/ |
替换相应固件， 启动相应固件。 |
实现步骤
1. 配置启动文件（开发板：192.168.1.168）
在开发板中，编辑开机启动脚本/etc/init.d/rcS
#cp ~/StartShell /etc/init.d/
#vi /etc/init.d/rcS
在该文件的最后面，填写下面信息：
./StartShell
重新启动开发板。
2. 发送更新文件文件（Linux PC：192.168.1.200）
#./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, |
|
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
1. 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.
2. Send the update file file (Linux PC: 192.168.1.200)
#./Fileclient ./AppMain 192.168.1.168
#./Fileclient ./Helloworld.ko 192.168.1.168
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
# Start the application program
cd /root/application/
./AppMain &
# Start TCP/IP service program
cd /tmp/update/
./FileServer &