嵌入式Linux固件升級
開發需求
• 基於TCP/IP完成驅動模塊和應用程序的更新、升級
特殊聲明
該文檔中驅動程序和應用程序統稱爲“固件”。
• 主 機：VMWare--Fedora 9
• 開發板：yc2440--64MB Nandflash；Kernel:2.6.24.4
• 編譯器：arm-linux-gcc-4.0.0
設計原理圖
說明：
• 開發板啓動FileServer應用程序，作爲TCP/IP的Server端，提供接收升級文件的服務。
• 當需要進行固件升級時，PC啓動FileClient應用程序，作爲TCP/IP的Client端，提供發送升級文件的服務。
• Shell腳本文件StartShell判斷是否有固件需要升級，如果有更新現有固件後，啓動更新後的固件，如果沒有，啓動現有固件。
|
文件名稱 |
所在目錄 |
功能 |
|
FileClient |
Linux PC下任意目錄 |
PC機TCP/IP客戶端， 向開發板發送升級固件。 |
|
FileServer |
Linux開發板 /tmp/update/ |
開發板TCP/IP服務端， 接收客戶端發送的升級固件。 |
|
StartShell |
Linux開發板 /etc/init.d/ |
替換相應固件， 啓動相應固件。 |
實現步驟
1. 配置啓動文件（開發板：192.168.1.168）
在開發板中，編輯開機啓動腳本/etc/init.d/rcS
#cp ~/StartShell /etc/init.d/
#vi /etc/init.d/rcS
在該文件的最後面，填寫下面信息：
./StartShell
重新啓動開發板。
2. 發送更新文件文件（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，被髮送至開發板的/tmp/update/（FileServer所在的目錄）目錄中。
重新啓動開發板，文件升級完成。
注：如果要動態加載驅動模塊，首先必須在開發板上創建/lib/modules/2.6.24.4目錄。
附件：
• TCP/IP源碼文件
http://download.csdn.net/source/2996852
注：TCP/IP 服務儘量使用大端口號，如：50000，否則服務器端會有Bind失敗的情況出現。
服務器端如果有防火牆，需要開放該端口號，否則客戶端會有connect失敗的情況出現。
• StartShell腳本
#! /bin/sh
#判斷是否有新的驅動文件，如果有進行替換
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
#判斷是否有新的應用程序文件，如果有進行替換
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
#啓動應用程序
cd /root/application/
./AppMain &
#啓動TCP/IP服務程序
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 &
